JP6981386B2 - Meter reading value collection device and meter reading value collection method - Google Patents

Description

The present invention relates to a meter reading value collecting device and a meter reading value collecting method for collecting meter reading values from a plurality of smart meters installed in a consumer at regular intervals, and particularly to a technique for preventing errors due to communication errors.

In recent years, an automatic meter reading system in which a smart meter is installed in each consumer and an information such as the amount of power used by each consumer is collected by a meter reading value collecting device called a concentrator (upper device) has become widespread. In the automatic meter reading system, the meter reading data collected by the smart meter is collected in the meter reading value collecting device from the communication terminal attached to each smart meter by a communication means such as wireless / power line carrier. However, regardless of the communication means, erroneous data may be transmitted due to the influence of home appliance noise, radio wave interference, etc., and the erroneous data may be recorded as a normal meter reading value as it is.

In order to detect such an error in the meter reading value, a method of incorporating an error check such as a checksum or a parity check into the meter reading data exchanged between each communication terminal and the meter reading value collecting device and detecting the error in the meter reading value by software. Is often taken. Further, a method of detecting an error in the meter reading value based on whether or not the difference from the previous meter reading value is within a predetermined threshold value has also been proposed (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2012-199726 (paragraphs 0013 to 0033, FIGS. 1 to 3)

By the way, in the automatic meter reading of a smart meter, the meter reading value data from each smart meter is usually collected every 30 minutes. Therefore, if an error check is incorporated and the data length is lengthened, it may be more susceptible to noise (burst noise) that occurs intermittently only in a limited time zone such as home appliance noise. Furthermore, while there is a time constraint of 30 minutes, if the meter reading data has an excessively long data length, it may be difficult to collect all the meter reading data within the time when the number of smart meters increases. be. In other words, it can be said that measures by incorporating an error check are not suitable for automatic meter reading of smart meters.

On the other hand, in checking whether the difference is within the threshold value, it is necessary to set the threshold value by trend analysis or the like from the information of the past usage status, which requires a lot of calculations and storage capacity. Further, even if an error is detected, it is difficult to distinguish whether the error is the previous meter reading value or the current meter reading value, and it is difficult to obtain an accurate meter reading value.

The present invention has been made to solve the above-mentioned problems, and realizes automatic meter reading that efficiently collects accurate meter reading values without the need for past trend analysis or lengthening of communication data. The purpose.

The meter reading value collecting device of the present invention is a meter reading value collecting device that collects measured values from a plurality of smart meters at regular periodic collection time intervals, and is continuous based on the rated values of the plurality of smart meters. A threshold value setting unit that sets a threshold value for each smart meter with respect to a difference in measurement values between collection time periods, and a measurement value measured in the collection time period from each of the plurality of smart meters for each collection time period, and the collection. Calculates and calculates the difference between the measurement values for the past three collection time periods that are continuous in the time period, the data acquisition unit that acquires the measurement values for the collection time period as the data set, and the measurement values between the continuous collection time periods in the data set. When all the differences are within the threshold range, each measurement value of the data set acquired by the data acquisition unit is set as a provisional value for the collection time period, and there is a difference that is not within the threshold range. In this case, the provisional value setting unit that replaces each measurement value with an invalid value indicating that it is invalid and sets it as the provisional value, the provisional value of the collection time set by the provisional value setting unit, and the collection time limit. The above in the provisional value group consisting of four provisional values corresponding to the measured values measured before the three collection time periods of the collection time period, which are extracted from the provisional values of the past three collection time periods in succession. It is characterized in that it is provided with a measurement value determination unit for determining the measurement value before the three collection time periods based on the detection result of the invalid value.

The meter reading value collecting method of the present invention is a meter reading value collecting method for collecting measured values from a plurality of smart meters at a fixed cycle collection time period, and is continuous based on the rated values of the plurality of smart meters. A threshold setting step for setting a threshold value for each smart meter with respect to a difference in measurement values between collection time periods, and a measurement value measured in the collection time period from each of the plurality of smart meters for each collection time period, and the measurement value. The difference between the data acquisition step of acquiring the measurement values for the past three collection time periods consecutive in the collection time period as the data set of the collection time period and the measurement values between the continuous collection time periods in the data set is calculated. If all the calculated differences are within the threshold range, each metric value of the data set acquired in the data acquisition step is set as a provisional value for the collection time limit, and the difference not within the threshold range is set. If there is, the provisional value setting step that replaces each weighing value with an invalid value indicating that it is invalid and sets it as the provisional value, the provisional value of the collection time set in the provisional value setting step, and the collection. In the provisional value group consisting of four provisional values corresponding to the measured values measured before the three collection time periods of the collection time period, which are extracted from the provisional values of the past three collection time periods that are continuous in the time period. It is characterized by including a weighing value determination step of determining the weighing value before the three collection time periods based on the detection result of the invalid value.

According to the meter reading value collecting device or the meter reading value collecting method of the present invention, the weighing value before the three time periods is determined at the present time, and a plurality of data for the same measuring time period having different collection time periods are used. Accurate meter reading values can be efficiently collected without the need for past trend analysis or lengthening of communication data.

It is a functional block diagram which shows the structure of the part concerning the function which sets a provisional value in the meter reading value collecting apparatus which concerns on Embodiment 1 of this invention, and the function which determines a measurement value. It is a system diagram which shows the communication connection system in the meter reading system which is the execution target of the meter reading value collecting method which concerns on Embodiment 1 of this invention. It is a functional block diagram which shows the structure of the smart meter which is the object of collecting the meter reading value by the meter reading value collecting method which concerns on Embodiment 1 of this invention, and the communication terminal. It is a functional block diagram which shows the structure of the meter reading value collecting apparatus which concerns on Embodiment 1 of this invention. It is a flowchart for demonstrating the operation from the meter reading value collection to the provisional value setting in the operation of the meter reading value collecting apparatus or the meter reading value collecting method which concerns on Embodiment 1 of this invention. Schematic diagram illustrating the relationship between the data set collected for each time period, a plurality of provisional values for each time period, and a fixed value in the operation of the meter reading value collecting device or the meter reading value collecting method according to the first embodiment of the present invention. Is. It is a figure which visualized the data in order to explain the operation from the collection of a data set to the difference calculation in the meter reading value collection method which concerns on Embodiment 1 of this invention. It is a figure which visualized the data in order to explain the provisional value determination operation when the difference is within the range in the meter reading value collecting method which concerns on Embodiment 1 of this invention. It is a figure which visualized the data in order to explain the provisional value determination operation when the difference is not within the range in the meter reading value collecting method which concerns on Embodiment 1 of this invention. It is a flowchart for demonstrating the operation which determines the measured value based on the set provisional value in the meter reading value collecting method which concerns on Embodiment 1 of this invention. It is a figure which visualized the data in order to explain the measurement value determination operation when an invalid value is not detected in the extracted provisional value in the meter reading value collecting method which concerns on Embodiment 1 of this invention. It is a figure which visualized the data in order to explain the measurement value determination operation when an invalid value is detected in the extracted provisional value in the meter reading value collecting method which concerns on Embodiment 1 of this invention. It is a figure which visualized the data in order to explain the measurement value determination operation of another example in which an invalid value was detected in the extracted provisional value in the meter reading value collecting method which concerns on Embodiment 1 of this invention.

Embodiment 1.
1 to 13 are for explaining the meter reading value collecting device or the meter reading value collecting method according to the first embodiment of the present invention, and FIG. 1 is a characteristic of the meter reading value collecting device and the meter reading value collecting method. A functional block diagram showing the configuration of the part related to the setting of the provisional value by simple error detection that executes the operation and the determination of the measured value by multiple provisional values for each time period. A system diagram showing a communication connection system in a meter reading system having a smart meter, FIG. 3 is a functional block diagram showing a configuration of a smart meter for which meter reading values are collected and a paired communication terminal, and FIG. 4 is a meter reading value collection. It is a functional block diagram which shows the structure of the meter reading value collecting apparatus which executes a method.

FIG. 5 is a flowchart for explaining the operation in the provisional value setting process until the meter reading value is collected from each smart meter in the meter reading value collecting method and the provisional value is set for each time period, and FIG. 6 shows the smart meter. In the target meter reading system, a data set that is a set of four meter reading values including the past three time periods collected for each time period, four provisional values for each time period set based on a plurality of data sets, and It is a schematic diagram explaining the relationship with the definite value adopted as a meter reading value based on a provisional value. FIG. 7 is a diagram in which the data is visualized in order to explain the operation of collecting the data set in the provisional value setting process and calculating the difference between the data of the adjacent time periods in the collected data set, and FIG. 8 is the provisional value setting. In the process, it is a diagram that visualizes the data to explain the provisional value determination operation when the difference between the data is within the range, and FIG. 9 is the data of the data set when there is a difference that is not within the range. It is a figure which visualized the data in order to explain the provisional value determination operation which replaces all with invalid values and makes it a provisional value.

Then, FIG. 10 is a flowchart for explaining the operation of the measurement value determination step of determining the measurement value based on the four provisional values for a certain time period, which is carried out after the provisional value determination step in the meter reading value collection method. FIG. 11 is a diagram in which data is visualized to explain the measurement value determination operation when an invalid value is not detected among the four provisional values corresponding to a certain time period extracted in the measurement value determination process. Is a diagram that visualizes the data to explain the measurement value determination operation when an invalid value is detected in the extracted provisional value, and FIG. 13 shows the invalid value detected in the extracted provisional value and the rest. It is a figure which visualized the data in order to explain the measurement value determination operation when the provisional value which does not match exists in the provisional value of. Hereinafter, the meter reading value collecting method according to the embodiment of the present invention and the meter reading value collecting device for executing the meter reading value collecting device will be described in detail with reference to the above-mentioned drawings. The present invention is not limited to this embodiment.

Before the detailed description of the meter reading value collecting device or the meter reading value collecting method according to the first embodiment of the present invention, the basic configuration of the target automatic meter reading system will be described. As shown in FIG. 2, the automatic meter reading system 100 connects the meter reading value collecting device 1 and the plurality of smart meters 4 by communication, and measures the meter reading values measured by the plurality of smart meters 4 at a fixed cycle (for example, at intervals of 30 minutes). ) Is configured to collect.

To each consumer, a smart meter 4 that measures the amount of electric power and a communication terminal (terminal child) that sucks up the meter reading value measured by the smart meter 4 and transfers the sucked meter reading value as meter reading data based on each communication method. Machine 3) is attached. Each terminal slave unit 3 is connected to a higher-level communication terminal (referred to as a terminal master unit 2) as a transfer destination via a wired or wireless communication line. A meter reading value collecting device 1 that collects and processes meter reading value data transferred to the terminal master unit 2 is connected to the upper side of the terminal master unit 2, and the meter reading value collecting device 1 is connected to the meter reading value collecting device 1. A management personal computer 5 that manages information on the meter reading values collected and processed by the user and sets the meter reading is connected.

An ID for identifying each of the smart meter 4 and the terminal slave unit 3 for each consumer is assigned, and these are associated with the meter reading value collecting device 1 through the terminal master unit 2. As a result, the meter reading value collecting device 1 can acquire information such as the rating information and the phase line type of each smart meter 4 by communication, and together with this, identifies from which smart meter 4 the meter reading value is collected. be able to.

The smart meter 4 is connected to a wiring on the power supply side (not shown) and a load wiring 70 wired for each consumer as shown in FIG. 3, and a terminal slave unit 3 for data transfer described above is connected to the smart meter 4. .. The smart meter 4 has a measuring unit 40 that measures (measures) electrical information (mainly the amount of electric power) related to the electric power supplied to the load wiring 70, a control unit 41 that controls the overall operation, and the measured electric energy. A data holding unit 42 that holds the meter reading value is provided. The smart meter 4 measures the amount of electric power every 30 minutes, stores it in the data holding unit 42, and transmits it as meter reading data to the terminal slave unit 3 via serial communication. The meter reading data transmitted here is a data set of electric energy for four consecutive periods (described later), which is a combination of the electric energy data measured at that time (time period) and the electric energy data for the past three periods. It is composed.

On the other hand, the terminal slave unit 3 has a data processing unit 30 that processes meter reading data transmitted from the smart meter 4, a control unit 31 that controls the whole, a data holding unit 33 that stores meter reading data, and various communication methods. A communication unit 32 for transmitting meter reading data based on the above is provided. The data processing unit 30 processes the meter reading data sucked up from the smart meter by error checking or the like, and stores it in the data holding unit 33. The stored meter reading data is configured to be transmitted to the terminal master unit 2 via the communication unit 32 in accordance with a transmission request sent from the terminal master unit 2 every 30 minutes.

The terminal master unit 2 may basically have the same configuration as the terminal slave unit 3, but it is desirable that the terminal master unit 2 has a configuration in which the processing capacity and the data holding unit are further strengthened. Further, as described with reference to FIG. 2, the terminal master unit 2 is assumed to be connected to, for example, hundreds of terminal slave units 3, and one terminal master unit 2 is connected to several hundred terminal slave units 3. It is desirable to be able to communicate and to have specifications that can handle them.

As shown in FIG. 4, the meter reading value collecting device 1 includes a communication unit 10 capable of communicating with the terminal master unit 2, a data processing unit 11 for processing transmitted / received data, and a control unit 12 for controlling the whole. A data holding unit 13 for storing data is provided. Further, in order to determine whether or not there is an error in the received data, a threshold value setting unit 14 for setting a threshold value for each smart meter 4 from the rating of each smart meter 4 is provided. The meter reading value collecting device 1 is a LAN (Local Area Network) or equivalent so that the terminal master unit 2 can communicate with the communication terminal and the management personal computer 5 for writing the settings to the meter reading value collecting device 1, respectively. Has a means of communication. By transmitting the meter reading data transmitted from the terminal master unit 2 to the management personal computer 5, the power consumption of the consumer is managed by the management personal computer 5.

Next, a provisional value setting process and a measurement value determination process for adopting error-free data from the collected data, which are characteristic parts of the meter reading value collection method according to the present embodiment, will be described. First, the details of the data processing unit 11, the control unit 12, the data holding unit 13, and the threshold value setting unit 14 of the meter reading value collecting device 1 that executes the provisional value setting step and the measurement value determination step will be described with reference to FIG. ..

The threshold value setting unit 14 includes a rating value acquisition unit 140 for acquiring rating information from the smart meter 4 and a threshold value calculation unit 141. The rating value acquisition unit 140 transmits a telegram to the smart meter 4 via the communication unit 10 to acquire the rating information and the phase line type information of the smart meter 4 installed in each consumer. From the acquired information, the threshold value calculation unit 141 calculates a threshold value to be used for determining error detection.

For example, as for the upper limit value of the threshold value, assuming that the rating of the smart meter 4 is 100V, 60A, 1P3W, the maximum value that can be measured as the electric energy for 30 minutes is calculated and used as the threshold value. Specifically, the converted (for example, 1.5 times) 9000 Wh is set as the threshold value so that the margin is included in the maximum value calculated as 100 V × 60 A × 2 × 0.5 = 6000 Wh. Further, the lower limit value of the threshold value is set to, for example, 0 Wh because the meter reading value cannot be negative. Of course, in the actual usage site, smart meters 4 having different specifications including the rating may be mixed and used, so the threshold value is set for each smart meter 4.

The data holding unit 13 has a data set holding unit 132 that stores meter reading values (data sets) for four time periods collected in one telegram as data of electric energy measured every 30 minutes, and the above-mentioned threshold value. It is provided with a threshold value holding unit 131 for storing the data, and a definite value holding unit 130 for storing the definite value finally determined as the meter reading value.

The data processing unit 11 is composed of a provisional value setting unit 11a that determines whether or not there is an error in the meter reading value and sets a provisional value, and a measurement value determination unit 11b that determines the measurement value from the set provisional value. ..

The provisional value setting unit 11a calculates based on the difference calculation unit 111 that calculates the difference between the measured values in the data set read from the data set holding unit 132 and the threshold value read from the threshold holding unit 131. It has a difference evaluation unit 112 that evaluates the difference. Then, when an evaluation result in which the difference is within the threshold value is obtained, the provisional value determination unit 113 for determining each data of the read data set as a provisional value for each measurement period is provided. Further, from the provisional values of the four different measurement time periods determined by the provisional value determination unit 113, the four provisional values of the common measurement time period collected in the different collection time periods are collectively output to the measurement value determination unit 11b. The provisional value editing unit 114 is provided.

On the other hand, when the control unit 12 receives the evaluation result that there is a difference that does not fall within the threshold value, the control unit 12 recollects the meter reading value from the corresponding smart meter 4 and replaces the data set stored in the data set holding unit 132. A recollection operation control unit 121 is provided to control the above. Even in this recollection operation, when the evaluation result that the difference is within the threshold value is received, each data of the data set obtained in the collection time is determined as a provisional value. However, an upper limit (for example, 3 times) is set for the number of recollections, and if the evaluation result that the number of recollections is within the threshold value is not obtained even after recollecting the upper limit number of times, the recollection is performed. To stop. Then, the provisional value determination unit 113 replaces all the data of the data set held at the time when the recollection of the corresponding smart meter 4 is stopped with an invalid value (blank), and determines the invalid value as the provisional value. The determined provisional values are collected when four provisional values of different collection time periods for the same measurement time period are prepared, and are output to the measurement value determination unit 11b.

The measurement value determination unit 11b is provided with an invalid value detection unit 115 that detects an invalid value among four provisional values collected in different collection time periods for the same measurement time period output from the provisional value determination unit 113. .. Then, when an invalid value is detected by the invalid value detecting unit 115, a matching evaluation unit 116 for evaluating the consistency of provisional values other than the invalid value is provided. Further, it includes a definite value determination unit 117 that determines a definite value to be determined as a measurement value based on the detection result of the invalid value detection unit 115 or the evaluation result of the consistency evaluation unit 116.

The invalid value detection unit 115 detects an invalid value from four provisional values of different collection time periods for a certain measurement time period for each smart meter 4 output from the provisional value determination unit 113. When an invalid value is detected, the number of detected invalid values (or the number of provisional values other than the invalid value) and four provisional values including the invalid value are output to the consistency evaluation unit 116. On the other hand, when an invalid value is not detected, four provisional values are output to the fixed value determination unit 117.

The consistency evaluation unit 116 is based on the number of invalid values output from the invalid value detection unit 115 and the provisional value. If the number of invalid values is 1, whether or not the three provisional values other than the invalid values match. To evaluate. Then, when the three provisional values other than the invalid value match, the information indicating the matched result and the matched value are output to the definite value determination unit 117. On the other hand, when the number of invalid values is larger than 1, the result is output to the definite value determination unit 117.

When the invalid value detection unit 115 does not detect the invalid value and the invalid value detection unit 115 outputs four provisional values, the fixed value determination unit 117 is one of the four provisional values (for example,). The latest) provisional value is determined as a definite value for definite as the meter reading value for that time period, and is configured to be output to the definite value holding unit 130. On the other hand, when the invalid value is detected by the invalid value detection unit 115 and the matching value is output from the consistency evaluation unit 116 with the information indicating the result of matching the three provisional values other than the invalid value, the matching value is output. It is configured to be determined as a fixed value for that time period and output to the fixed value holding unit 130.

On the other hand, when the information that the number of invalid values is larger than 1 is output from the consistency evaluation unit 116, the invalid value is determined as a definite value (no meter reading value) and output to the definite value holding unit 130. It is composed. Further, when an invalid value is adopted as a definite value based on the above conditions or the information from the consistency evaluation unit 116, it is configured to output to that effect to the warning operation control unit 122 provided in the control unit 12. ing. The warning operation control unit 122 is configured to control the warning operation so as to display a warning on, for example, the management personal computer 5.

When the invalid value detection unit 115 does not detect an invalid value, the invalid value detection unit 115 outputs information indicating that there is no invalid value and the latest provisional value among the four provisional values to the final value determination unit 117. It may be configured as follows. In this case, when the information indicating that there is no invalid value and one provisional value are output from the invalid value detection unit 115, the fixed value determination unit 117 uses the output one provisional value as the fixed value (meter reading) for that time period. It may be determined as a value) and configured to be output to the fixed value holding unit 130.

The operation when the automatic meter reading system 100 as shown in FIG. 2 is configured by using the meter reading value collecting device 1 configured as described above will be described. First, the operation of the provisional value setting process will be described mainly with reference to the flowchart of FIG. 5 with reference to the schematic diagram of the data of FIG. 6 and the visualization diagrams of FIGS. 7 to 9 as appropriate.

In the provisional value setting process, the meter reading value collecting device 1 first sets the weighing value at the weighing time corresponding to the current collection time and the weighing value for the past three time periods via the terminal master unit 2 and the terminal slave unit 3. In addition, the data set Dg of the measured values for a total of 4 time periods is collected from the smart meter 4 (step S100). Here, assuming that the current collection time is t (for example, 2:30), as shown in FIG. 6, the data set collected in the current collection time t is represented _{as Dg (t). Specifically, the data set Dg (t)} collected in a certain time period t _{includes the first measurement value (D 1 (t)} ) weighed three times before (t-3 = 1:00) and 2 _{The second weighing value (D 2 (t)} ) weighed before the limit (t-2 = 1:30) and the third weighing value (D) weighed one time before (t-1 = 2:00). _{3 (t) ) and a fourth weighed value (D 4 (t)} ) weighed in the current time period (t = 2:30) are included.

In the following description, if the collection time is not specified, the measured value can be displayed without the code " _{(t) " as in "D 1} , D ₂ , D ₃ , D _4". , In the case of provisional value editing, which will be described later, a code for specifying the collection time is added as described above in order to handle data with different collection time. A data set composed of data of different measurement time periods for each collection time period collected in this way is stored in the data set holding unit 132.

When the data set Dg as shown in FIG. 7A is obtained in this way, the difference calculation unit 111 calculates the difference between the measured values of the adjacent collection time periods in the data set Dg (step S110). .. Specifically, as shown in FIG. 7 (b), 3 units of instruction before the weighing D ₁ and the difference delta ₂₁ of 2 units of instruction before the weighing D _{2, 2} units of instruction before the weighing D ₂ and first period before difference delta _32, 1 timed previous metric value _{D 3} and the difference _{delta 43} the weighing _{D 4} of the current time period the weighing _{D 3,} to calculate a city.

For example, in FIG. 7 (a), (b) , each weighing data set _Dg in _{(t) is, D 1 (t)} is _{1600Wh, D 2 (t)} is _{1800Wh, D 3 (t)} is 2000Wh, The case where D _{4 (t)} is 2200 Wh is shown. As a result, the calculated difference Δ ₂₁ is 200 Wh, the difference Δ ₃₂ is 200 Wh, and the difference Δ ₄₃ is 200 Wh.

Difference evaluation unit 112, the three difference difference calculation unit 111 calculates _{(Δ 21, Δ 32, Δ} 43) and compares the threshold holder 131 and the read threshold value, whether the difference is within the threshold value Determination (step S120). For example, as shown in FIG. 8A, when all three differences are within the threshold range (0 to 9000 Wh) (“Y” in step S120), the provisional value determination unit 113 uses the data set Dg. The values of all the measured values (D _{1 to} D ₄ ) among them are determined as they are as provisional values (Dt _{1 to Dt 4) (step S150).} Specifically, as shown in FIG. 8 (b), all the provisional values (Dt _{1 (t)} , Dt _{2 (t)} , Dt _{3 (t)} , Dt _{4 (t) in the data set Dg (t). )} ) Is determined by the value (1600Wh, 1800Wh, 2000Wh, 2200Wh) of the weighing values (D _{1 (t)} , D _{2 (t)} , D _{3 (t)} , D _{4 (t)).}

On the other hand, for example, when there is a difference that does not fall within the threshold range among the three differences (“N” in step S120), the difference becomes the threshold value up to three times (“Y” in step S130). Recollection (retry) is performed until it is settled (“N” in step S130). For example, if as shown in FIG. 9 (a), there is a range of 23556Wh and threshold time of the acquisition differences do not fall (0~9000Wh) (Δ _43), as shown in FIG. 9 (b), Retry is performed until a data set Dg in which all the differences fall within the threshold value is obtained.

In this example, since it was not possible to obtain a data set Dg in which the total difference falls within the threshold value even after three recollections, as shown in FIG. 9 (c), all the measured values in the data set Dg (t) ( D _{1 (t)} , D _{2 (t)} , D _{3 (t)} , D _{4 (t)} ) are replaced with invalid values (step S140). Then, the invalid value is determined as a provisional value (Dt _{1 (t)} , Dt _{2 (t)} , Dt _{3 (t)} , Dt _{4 (t)} ) (step S150). Of course, if all the differences fall within the threshold value in the process of recollection, the measured value Dg collected at that time is determined as a provisional value (Dt _{1 to Dt 4} ).

_{When the provisional value Dt (t)} in the collection time limit t is determined, the provisional value editing unit 114 sets the current collection time limit and the past as provisional values necessary for determining the _{final value Dv (t-3) for the measurement before the three time periods.} From the provisional values for the three collection time periods, four provisional values are collected and output to the measurement value determination unit 11b (step S160).

Specifically, the measurement value D in FIG. 6 will be read as a provisional value Dt (for example, “D _{1 (t)} ” → “Dt _{1 (t)} ”). The fourth provisional value Dt _{4 (t-3)} before the third time period, the third provisional value Dt _{3 (t-2)} before the second time period, and the second provisional value Dt _{2 (t-) before the first time period. 1)} and the first provisional value Dt _{1 (t)} of the current time period indicate the measured value of the time period t-3. Therefore, the four provisional values Dt that have the same weighing time and different collection time, that is, the timing transmitted by communication, are put together and used as the provisional value group Vgt _{(t-3) for determining the fixed value before the three time periods.} , Is output to the measurement value determination unit 11b. As a result, the provisional value setting process is completed, and the process shifts to the measurement value determination process.

The operation of the measurement value determination process will be described mainly with reference to the flowchart of FIG. 10 with reference to the schematic diagram of the data of FIG. 6 and the visualization diagram of the data of FIGS. 11 to 13.
The provisional value group Vgt output from the provisional value editing unit 114 toward the measurement value determination unit 11b is read by the invalid value detection unit 115 as data for determining the measurement value three time periods before the current collection time period (. Step S200). The invalid value detection unit 115 detects whether or not an invalid value exists among the four provisional values Dt in the read provisional value group Vgt (step S210). If there is no invalid value (“N” in step S210), the four provisional values Dt are output to the final value determination unit 117. Then, the fixed value determining unit 117 adopts any one of the four provisional values Dt as the fixed value Dv of the electric energy measured three times before (timed t-3) (step S220).

For example, as shown in FIGS. 11A and 11B, when there is no blank in any of the four provisional values and a valid value is set, the measured value collected in the current collection time period before the three time periods is used. The first provisional value Dt _{1 (t)} (= 1600Wh) set for this is adopted as the _{definite value Dv (t-3).} At this time, the fixed value Dv is _{not limited to the provisional value Dt 1 (t),} and may be any of the four provisional value Dt in the provisional value group Vgt _(t-3). This is because in the automatic meter reading of the smart meter, a reading error such as manual input does not occur, and the measured value itself has no error.

That is, when there is an error in the collected data, it is only assumed that the data indicating the correct value is not properly transmitted due to a communication failure or the like and changes to the data indicating the incorrect value. Therefore, if there is no invalid value in multiple collections with different time periods, there is no change in data due to communication failure, etc., and all the values judged to be valid are practically correct values. Because it is supposed.

On the other hand, when an invalid value is detected (“Y” in step S210), the process differs depending on the number of invalid values (step S230). When there is one invalid value, the invalid value detection unit 115 outputs the number of detected invalid values (or the number of provisional values other than the invalid value) and four provisional values including the invalid value to the consistency evaluation unit 116. .. The consistency evaluation unit 116 compares (three) provisional values Dt other than invalid values (step S240). Then, when all three provisional values Dt other than the invalid value match (“Y” in step S250), the information indicating the matched result and the matched value are output to the definite value determination unit 117. The final value determination unit 117 adopts the matched provisional value Dt, that is, any provisional value Dt other than the invalid value as the final value Dv (step S260).

Here, if there is a provisional value that does not match among the three provisional values other than the invalid value (“N” in step S250), the consistency evaluation unit 116 outputs the result to the final value determination unit 117. In that case, the definite value determination unit 117 adopts an invalid value for the definite value Dv of the electric energy measured before the third period (time period t-3) (step S270), that is, it is determined that the measurement could not be performed. .. At this time, the information that the invalid value is adopted is also output to the warning operation control unit 122. Although not described in the flowchart, the warning operation control unit 122 controls the warning operation so as to display a warning on, for example, the management personal computer 5.

When the number of invalid values is two or more (“N” in step S230), the definite value determination unit 117, which receives the result from the invalid value detection unit 115, measures the value before the third period (time period t-3). An invalid value is adopted as the definite value Dv of the electric energy (step S270). Then, the information that the invalid value is adopted is also output to the warning operation control unit 122.

For example, as shown in FIGS. 12 (a) and 12 (b), when one of the four provisional values (Dt _{2 (t-1)} ) is an invalid value, the remaining three provisional values ( Confirm the consistency of Dt _{4 (t-3)} , Dt _{3 (t-2)} , Dt _{1 (t)).} Then, as shown in FIG. 12 (c), when the three provisional values Dt match, the matched value (1600 Wh) is adopted as the _{definite value Dv (t-3).}

On the other hand, in FIGS. 13 (a) and 13 (b), when there are provisional values (Dt _{3 (t-2)} ) having different values among the three provisional values Dt, the remaining two provisional values (Dt _{4 (Dt 4) Even if t-3)} and Dt _{1 (t)} ) match, the definite value determination unit 117 that receives the result determines the definite value Dv _{(t-) of the electric energy measured three times before (time t-3).} An invalid value is adopted for _{3) (step S270).} It is assumed that there is a high possibility that a communication error has occurred if an invalid value exists even once out of the four collection time periods, and all the remaining provisional values match. This is because, except in the case, the reliability of the transmitted value is considered to be low.

That is, in the meter reading value collecting method according to the present embodiment, as in the conventional case, a simple threshold value determined by the rated value and the past three time periods are not accompanied by the memory of the past history and the use of complicated telegrams. It suffices to store the data set of the measured values for the number of target smart meters 4. Using this, the measurement value before the 3 collection time is determined instead of the current collection time by a simple comparison as described above, so that only highly reliable data can be adopted as the measurement value.

As described above, the target for determining the measured value is 3 time periods before (1.5 hours before), but a provisional value may be used for demand control, and it is practically possible that the determination is delayed by 3 periods. No problem. Above all, since long telegrams and complicated error checks are not required, the communication time does not extend within the limited collection time, and it is possible to collect highly reliable measured values as a whole. In other words, we decided to determine the measurement value before the 3rd period at the present time, and made it possible to use multiple data for each collection period, so there is no need for past trend analysis or lengthening of communication data, and there is an error. It is possible to specify the meter reading value and efficiently collect the accurate meter reading value.

As described above, in the meter reading value collecting device 1 according to the first embodiment of the present invention, the meter reading value collecting device 1 collects measured values from a plurality of smart meters 4 for each collection period of a fixed cycle (for example, 30 minutes). A threshold setting unit 14 that sets a threshold value for each smart meter 4 with respect to a difference in measured values between consecutive collection time periods based on the rated values of each of the plurality of smart meters 4, and a plurality of threshold value setting units 14 for each collection time period. From each of the smart meters 4 of the above, the measured value D _{4 (t) measured in the collection time period and the measurement value (D 1 (t)} , D _{2 (t)} for the past three collection time periods continuous with the collection time period. , _{D 3} and _(t)), a data acquisition unit 15 for acquiring a data set _Dg of the collection time period _(t) of the difference (delta ₂₁ the weighing between collection time period of consecutive among the data sets Dg, delta _32, to calculate the delta _43), calculated when the difference is within the scope of the threshold value, the provisional value Dt of the collecting each weighing data set Dg to the data acquisition unit 15 has acquired timed (t) ₍ set as _t), if there is a difference that is not within the range of the threshold value, the provisional value setting unit 11a for setting a provisional value Dt _(t) is replaced with an invalid value to indicate that each metered value is invalid , a provisional value _Dt of the collection time period the provisional value setting unit 11a is set _(t) (t), the provisional value of the last three collected timed component that is continuous with the collection time period _{(Dt (t-3),} Dt (t- _{2) Four provisional values (Dt 4 (t-3} )) extracted from Dt _(t-1) ) and corresponding to the measured values measured 3 before the collection time (t-3) of the collection time. ₎ , Dt _{3 (t-2)} , Dt _{2 (t-1)} , Dt _{1 (t)} ), 3 based on the detection result of the invalid value in the provisional value group Vgt _(t-3). Since it is configured to include a measurement value determination unit 11b that determines the measurement value before the collection time limit, it is possible to analyze past trends and use communication data by using a plurality of data having different collection time periods for the same measurement time limit. Accurate meter reading values can be efficiently collected without the need for lengthening.

In particular, if the detection result does not include an invalid value, the measurement value determination unit 11b measures the value of any of the provisional values in the provisional value group Vgt _(t-3) 3 before the collection time limit. It is confirmed as a value, and if only one invalid value is included, the remaining provisional values match the values of the remaining provisional values excluding the invalid values in _{the provisional value group Vgt (t-3).} Any of these values was determined as the weighing value before the 3 collection time limit, and if there was a provisional value that did not match, the weighing value before the 3 collection time limit was invalidated and two or more invalid values were included. In this case, if the measurement value before the collection time limit is invalidated, it is possible to prevent erroneous data from being adopted due to the influence of erroneous transmission, and to collect the meter reading value more reliably. Can be done.

Further, for the smart meter 4 in which there is data not within the threshold range in the difference calculated by the provisional value setting unit 11a, the data set Dg _{(t) in the collection time limit (t) is limited to a predetermined number of times.} By configuring the recollection operation control unit 121 to recollect the data, even if the data cannot be received properly, the influence on the next collection time is minimized, and the communication failure occurs in the short collection time. You can overcome it and collect data efficiently.

It is a meter reading value collection method that collects measured values from a plurality of smart meters 4 for each collection time period of a fixed cycle (for example, 30 minutes), and is a continuous collection time period based on the rated value of each of the plurality of smart meters 4. A threshold setting step for setting a threshold value for each smart meter 4 with respect to the difference between the measured values, and a measured value D _{4 (t) measured in the collected time period from each of the plurality of smart meters 4 for each collection time period. , The measurement values (D 1 (t)} , D _{2 (t)} , D _{3 (t)} ) for the past three collection time periods consecutive to the collection time period are acquired as the data set Dg _{(t) of the collection time period.} data acquisition step (step S100), successive difference metric between collection time period _{(Δ 21, Δ 32, Δ} 43) is calculated, the range calculated difference are all threshold among the data sets _{Dg (t) If it is, each measurement value of the data set Dg (t)} acquired in the data acquisition step (step S100 _{) is set as the provisional value Dt (t)} of the collection time limit (t), and the value falls within the threshold range. If there is a difference that is not present, replace it with an invalid value indicating that each metric value is invalid and set it as the provisional value Dt _(t) in the provisional value setting step (steps S120 to S150) and the provisional value setting step. The provisional value Dt _{(t) of the set collection time period (t) and the provisional values (Dt (t-3)} , Dt _(t-2) , Dt _(t- ) for the past three collection time periods consecutive to the collection time period). _{4 provisional values (Dt 4 (t-3)} , Dt _{3 (t-2)} , Dt _{2 ) extracted from 1)} ) and corresponding to the measured values weighed before the 3 collection time limits. Based on the detection result of the invalid value in the provisional value group Vgt _{(t-3) composed of (t-1)} and Dt _{1 (t)} ), the measurement value determination before the 3 collection time period is determined. Since it is configured to include steps (steps S210 to S270), by using a plurality of data having different collection times for the same measurement time, it is not necessary to analyze past trends or lengthen communication data. Accurate meter reading values can be efficiently collected.

In particular, in the measurement value determination step (steps S210 to S270), if the detection result does not include an invalid value, the value of any of the provisional value group Vgt _(t-3) is used as described above. 3 When the measurement value is confirmed before the collection time limit and only one invalid value is included, when the values of the remaining provisional values excluding the invalid value in _{the provisional value group Vgt (t-3) match.} Determines any of the remaining provisional values as the weighing value before the 3 collection time limit, and if there is a provisional value that does not match, the weighing value before the 3 collection time limit is invalidated and the invalid value is 2. If more than one is included, the measurement value before the collection time limit is invalidated. If it is configured to invalidate the measurement value, it is possible to prevent the wrong data from being adopted due to the influence of the wrong transmission, and it is more reliable and accurate. Meter reading values can be collected.

In the provisional value setting step (steps S120 to S150), the data set in the collection time limit is recollected for the smart meter 4 which has data not within the threshold range in the calculated difference, up to a predetermined number of times. If the recollection operation (step S120, S130 → step S100) is configured to be executed, even if the data cannot be received successfully, the influence on the next collection time is minimized and the collection time is short. Therefore, it is possible to overcome communication failures and collect data efficiently.

1: Meter reading value collection device, 2: Terminal master unit, 3: Terminal slave unit, 4: Smart meter, 5: Management personal computer, 10: Communication unit, 11: Data processing unit, 11a: Temporary value setting unit, 11b: Weighing Value determination unit, 12: control unit, 13: data retention unit, 14: threshold calculation unit, 15: data acquisition unit,
111: Difference calculation unit, 112: Difference evaluation unit, 113: Provisional value determination unit, 114: Provisional value editing unit, 115: Invalid value detection unit, 116: Consistency evaluation unit, 117: Confirmed value determination unit, 121: Re Collection operation control unit, 122: Warning operation control unit, 131: Threshold holding unit, 140: Rated value acquisition unit, 141: Threshold calculation unit,
Dg: data set, Dt: provisional value: Dv: definite value, Vgt: provisional value group.

Claims (6)

It is a meter reading value collection device that collects measured values from multiple smart meters at regular collection time intervals.
A threshold setting unit that sets a threshold value for each smart meter with respect to a difference in measured values between consecutive collection time periods based on the rated values of each of the plurality of smart meters.
For each collection time period, the data set of the measurement values measured in the collection time period and the measurement values of the past three collection time periods consecutive to the collection time period from each of the plurality of smart meters are used as the data set of the collection time period. The data acquisition unit to be acquired and
The difference between the measured values between the continuous collection time periods in the data set is calculated, and if all the calculated differences are within the threshold range, each measured value of the data set acquired by the data acquisition unit is used. A provisional value setting unit that is set as a provisional value for the collection time, and if there is a difference that is not within the threshold range, it is replaced with an invalid value indicating that each measurement value is invalid and set as the provisional value. When,
Weighed before the 3 collection time periods of the collection time, extracted from the provisional value of the collection time set by the provisional value setting unit and the provisional values of the past 3 collection time periods that are continuous with the collection time period. Based on the detection result of the invalid value in the provisional value group composed of four provisional values corresponding to the values, the measurement value determination unit for determining the measurement value before the three collection time limits, and the measurement value determination unit.
A meter reading value collecting device characterized by being equipped with. The measurement value determination unit is
In the above detection result,
If the invalid value is not included, the value of any of the provisional values in the provisional value group is determined as the measurement value before the three collection time limits.
If only one invalid value is included, and if the values of the remaining provisional values excluding the invalid value in the provisional value group match, one of the remaining provisional values is used. Is determined as the measurement value before the 3 collection time limit, and if there is a provisional value that does not match, the measurement value before the 3 collection time limit is invalidated.
If two or more of the invalid values are included, the weighing value before the three collection time limit is invalidated.
The meter reading value collecting device according to claim 1. A recollection operation control unit that recollects the data set in the collection time limit for a smart meter that has data that is not within the threshold range in the difference calculated by the provisional value setting unit. The meter reading value collecting device according to claim 1 or 2, wherein the meter reading value collecting device is provided. It is a meter reading value collection method that collects measured values from multiple smart meters at regular collection time intervals.
A threshold setting step for setting a threshold value for each smart meter with respect to the difference in the measured value between consecutive collection time periods based on the rated value of each of the plurality of smart meters.
For each collection time period, the data set of the measurement values measured in the collection time period and the measurement values of the past three collection time periods consecutive to the collection time period from each of the plurality of smart meters are used as the data set of the collection time period. The data acquisition step to be acquired and
The difference between the measured values between the continuous collection time periods in the data set is calculated, and if all the calculated differences are within the threshold range, each measured value of the data set acquired in the data acquisition step is used. A provisional value setting step that is set as a provisional value for the collection time, and if there is a difference that is not within the threshold range, it is replaced with an invalid value indicating that each measurement value is invalid and set as the provisional value. When,
Weighed before the 3 collection time periods of the collection time period, extracted from the provisional value of the collection time period set in the provisional value setting step and the provisional values of the past 3 collection time periods that are continuous with the collection time period. Based on the detection result of the invalid value in the provisional value group composed of four provisional values corresponding to the values, the measurement value determination step of determining the measurement value before the three collection time periods, and the measurement value determination step.
A meter reading value collection method comprising. In the measurement value determination step,
In the above detection result,
If the invalid value is not included, the value of any of the provisional values in the provisional value group is determined as the measurement value before the three collection time limits.
If only one invalid value is included, and if the values of the remaining provisional values excluding the invalid value in the provisional value group match, one of the remaining provisional values is used. Is determined as the measurement value before the 3 collection time limit, and if there is a provisional value that does not match, the measurement value before the 3 collection time limit is invalidated.
If two or more of the invalid values are included, the weighing value before the three collection time limit is invalidated.
The meter reading value collecting method according to claim 4, wherein the meter reading value is collected. In the provisional value setting step,
The feature is that a recollection operation is executed to recollect the data set in the collection time limit for a smart meter having data that is not within the threshold range in the calculated difference, up to a predetermined number of times. The meter reading value collecting method according to claim 4 or 5.

Images