JP3435174B2 - Observation system for digital protection controller - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an observation system capable of observing the operation and device state of a digital protection control device.

[0002]

2. Description of the Related Art The technique of applying a microcomputer to a protection and control device for a power system is well known. Today, as the scale of power system expands, the increase of system protection and control equipment is becoming a problem. As one solution to this problem, a large number of protections, protections for control targets, and control are possible. In addition, there is a digital protection control device which can make the device compact. Specifically, there are a digital relay for determining a system fault, a fault locator for locating a system fault, and a system stabilizing device for stabilizing the system. The digital protection control device described above is currently
Widely applied to the operation of power systems. The conventional technique will be described below using a fault locator as an example.
FIG. 6 shows the structure of a basic fault locator. The fault locator shown in the figure comprises an analog / digital conversion unit 1, a digital arithmetic processing unit 2, an external input / output interface 3, a bus 4, and an operator interface unit 10. In addition, from 1 to 3
The respective units of 10 are connected to each other via a bus 4.

The analog / digital converter 1 is composed of analog filters 1-11 to 1-1n, sampling and holding sections 1-21 to 1-2n, a multiplexer 1-3, and an analog / digital converter 1-4. The n pieces (n ≧ 1) of analog information A-1 to An used for point orientation are held at a predetermined sampling interval and then converted into digital quantities. On the other hand, the digital arithmetic processing section 2 includes CPU2-1, R
It is composed of AM2-2 and ROM2-3, and the above-mentioned digitally converted electric quantity data is sequentially transferred to RAM2-2. Based on this data and the program from ROM2-3, CPU2-1 is used for fault location. Various processing of. The input / output interface 3 is an interface for fetching an external control device state such as CB information and outputting to the external device. The operator interface unit 10 is a unit for interfacing between the digital protection control device and the operator of the device, and the input given from the operator to the device is mainly the impedance of the transmission line, the sensitivity of the relay, or a set value such as a timer. There are operation switching commands, etc., and the output given from the device to the operator includes a relay operating state, a set value setting state, a device operating state, an external control device loading state, and the like.

When a system fault occurs, the fault locator locates the fault point, displays the orientation result on the operator interface unit 10, and outputs the orientation result to the outside of the apparatus by the input / output interface 3. In the case of a digital relay that protects the system, it also displays and externally outputs an accident aspect such as a short circuit accident or a ground fault accident. In recent years, with the unmanned power stations where these protection and control devices are installed, it is common to obtain orientation results and accident aspects at manned distant power stations and use them for operation and subsequent maintenance in the event of a system fault. It is becoming a target. In order to achieve such an object, conventionally, as shown in FIG. 7, the input / output interface 3 of the protection control device and the remote monitoring control device are connected to each other, and a dedicated line is used to show the orientation result and the appearance of the accident to the manned electrical equipment. Had been transferred to the place.

[0005]

Although the information transfer means to the distant place of the conventional protection control device has been described above, there are the following problems. First of all, since a dedicated line is used, flexibility is low when adding a partner station to which information is to be transferred or when changing a communication route, and the frequency of system accidents is low. There is also a problem in terms of economy. Second,
As digitalization of protection and control equipment progresses, the amount of data that can be recorded using memory in the event of a system fault is increasing, and along with this, the instantaneous value of the system electricity quantity is being verified in order to verify the operation of the system. It has become possible to record such a large amount of information and analyze it with a general-purpose device such as a personal computer. In this respect, it is difficult to deal with these problems with the conventional distant monitoring control device which aims to quickly collect a small amount of information from the protection control device. It is complicated and there are problems in terms of reliability and economy.
The present invention has been made in view of the above circumstances. By efficiently utilizing and combining the features of the digital protection control device and the features of the telephone line network, the digital protection having high functionality, reliability, and economy. It is intended to provide an observation system for a control device.

[0006]

An observation system for observing the operation and device state of a digital protection control device according to claim 1 of the present invention inputs an electric quantity of an electric power system, converts it into digital data, and outputs the electric power. In an observation system for observing the operation and device state of a digital protection control device for system protection control, if a predetermined recording start condition is satisfied by the output of at least one digital protection control device provided at the self-end, the recording start Data recording means for recording predetermined digital data according to conditions, and when transmitting the recorded digital data to a plurality of partner stations in a predetermined order, the partner station of the digital data requires Data transfer means for transferring digital data via the telephone network is provided, and the data transferred at the partner station is transferred. Comprising data receiving means for receiving the data, and an observation result output means for outputting the observation results. According to a second aspect of the present invention, in the observation system for observing the operation and the state of the digital protection control device, in the first aspect, the recording start condition is a system internal accident or a system external accident, and the data transfer means. Transmits data according to an accident to the plurality of partner stations that need the data in a predetermined order. An observation system for observing the operation and device state of a digital protection controller according to claim 3 of the present invention is the observation system according to claim 1, in which the data transfer means transfers the data to the plurality of partner stations. When there is a request for, the desired digital data is transferred from the data recording means in response to the request.

The arbitrary data in the digital protection control device is recorded by the data recording means when the predetermined recording start condition is satisfied, and the recorded digital data is transmitted by the data transfer means through the telephone line network. , When transmitting in a predetermined order to each of a plurality of partner stations, transfer is performed according to a request from the partner station, and the transfer condition can be selected from requests from the partner station, and the partner station receives this. The observation result output is transmitted together with.

[0007]

Embodiments will be described below with reference to the drawings. Figure 2
FIG. 1 is a configuration diagram of an embodiment of an observation system according to the present invention. In this embodiment, the basic configuration of the digital protection control device to be observed is the same as the conventional one, but the data recording means 11 collects and records data from other units via the bus 4. Is different. The data recording means 11 includes a CPU 11-1, I / O 11-4, ROM 11-3 and R.
It is composed of AM11-2 and INF11-5. The ROM 11-3 stores the recording start condition and the recording format. Here, the recording start condition is a condition for recording data in the RAM 11-2 when the condition is satisfied. In the fault locator and the digital relay, occurrence of a system fault, occurrence of a device abnormality, etc.
It can be considered as a recording start condition. That is, when a system fault occurs, data relating to the system fault (for example, system electricity quantity, relay operating state, etc.) will be recorded. In addition, the recording format includes data to be recorded, a recording period, and a recording interval. The data to be recorded includes system electricity, relay operation status, external equipment information acquisition status, automatic monitoring result, recording start condition satisfaction time, and the like.
The recording period is set to record data from T _P time before the recording start condition is satisfied to T _A time after. The recording interval is set so that the system electricity is recorded at t ₁ hour intervals and the relay operating state is recorded at t ₂ hour intervals.

FIG. 3 is a diagram for explaining the example shown above.
Shown in. In FIG. 3, the system electricity quantity and the relay operation state are recorded. From the time T _P before the start condition is satisfied to the time T _A after the condition is satisfied, t ₁
And t _{2 at} intervals, the state of sequentially recording in the RAM 11-2 is shown. After the recording is completed, the recorded data is transferred to the modem 12 via the I / O 11-4. Although the transfer data is a digital signal, it is modulated into an analog signal by the modem 12 and sent to the telephone line. The telephone number of the partner station is set in the modem, and the recorded data is sequentially sent to the modem of the partner station in accordance with the set telephone number.
In the partner station, the data demodulated by the modems 13-1 to 13-n are sequentially input to the observation result output means 14-1 to 14-n.
The observation result output means 14-1 includes a CPU 14-1-1 and a RAM 14
-1-2, ROM14-1-3, I / O14-1-4, keyboard 14-1-
5, CRT 14-1-6, printer 14-1-7, and the data taken in via I / O 14-1-4 is CR
It will be output as an observation result by T14-1-6 or printer 14-1-7. Here, the CPU 14-1-1 can process the observation result into a form that is easy for the user to see.
For example, when the system electricity amount is displayed, it is easy to see by displaying the waveform form or the vector as the analog amount. Similarly, the observation results of the observation result output means 14-2 to 14-n can be obtained.

According to the above-described embodiment, the data recording means 11 is provided to efficiently collect and record the data in the protection control device and transfer the data by using the telephone line. A large amount of information can be transferred efficiently compared to a system using a control device and a dedicated line. Also, in order to use the telephone line, the addition of the partner station,
The change can be made only by changing the telephone number of the modem 12, and the system can be expanded and changed easily and flexibly.
It also has the effect of improving economic efficiency.

In the above embodiment, the observation result output means 14 is shown as a form in which the transferred data is immediately output, but the present invention is not limited to this, and the transferred data is temporarily stored in the RAM 14-1. It is conceivable that the data may be recorded in -2 and output to the CRT 14-1-6 or the printer 14-1-7 as needed. As an effect in this case, in addition to the above-described effect, there is an effect that a user can obtain a necessary record at any time when the user needs it, without requiring data transfer.

Further, in the first embodiment, the data transfer to the partner station is started from the end of recording in the protection control device, but in addition to this, the data transfer to the partner station is performed from the partner station. It is conceivable that the configuration may be performed according to the request of In this case, the data transfer request is sent from the keyboard 14-1-5 of the observation result output means 14 of the partner station to the data recording means 11 by the modems 13 and 12.
The data recording means transfers the data recorded by 11 to the partner station. By doing so, only the recording data desired by the user is transferred, and in addition to the effect similar to that of the first embodiment, there is an effect that the use efficiency of the line is improved.

Further, in the first embodiment, the recording start condition and the recording format are stored in advance in the ROM 11-3 in the data recording means 11 and the recording is carried out according to this. The conditions and recording format are input by the keyboard 14-1-5 of the observation result output means 14 of the partner station, and the R in the data recording means 11 is passed through the modems 13 and 12.
It is conceivable to write to AM11-2. As a result, even if the type of data requested by the user changes, it becomes possible to easily record and transfer the required data by the operation from the partner station, and in addition to the same effects as the first embodiment. In addition, the operability, flexibility, and reliability can be improved.

Further, in the first embodiment, the same record data is sequentially transferred to n partner stations. However, in addition to this, according to the content of the recording start condition, the record content, the data transfer content, and the transfer partner station are transferred. Among them, a mode in which at least one or more are controlled or selected can be considered. First, the case of controlling the recorded contents will be described. As described above, in the protection control device, the occurrence of a system accident can be considered as the recording start condition, but if this is considered in more detail, it is possible to distinguish between the occurrence of an external accident and the occurrence of an internal accident. In case of an internal accident, the observation system requires as much relevant data as possible,
In case of an external accident, less data is required. Therefore, considering the two record activation conditions of internal accident occurrence and external accident occurrence, the same data (for example, system electricity quantity,
Recording and transmitting relay operation and external device information) is not preferable in terms of memory usage efficiency and line usage efficiency. Therefore, as in the present embodiment, for example, when the internal accident occurs, the system electricity amount, the relay operation, the external device information and the like are recorded, and when the external accident occurs, only the relay operation is recorded. Can record and transfer.

Next, control of data transfer contents will be described. In this case, the print data is the same regardless of the print start condition. Then, the data transfer content is controlled by the recording start condition. For example, in the event of an internal accident, the system electricity quantity, relay operation, and external device information are selected and transferred from the recorded data, and in the event of an external accident, only the relay operation is selected and transferred. By doing so, the use efficiency of the line is improved.

Next, selection of a transfer partner station will be described.
At the electric station where the observation result output means 14 is installed, the observation system of the present invention may be used for different tasks. For example, in an electric station whose business is maintenance of power lines,
The observation result may be only the orientation result transferred from the fault locator. Also, in the department that verifies the validity of the operation of the fault locator, the system electricity quantity at the time of the system fault,
A lot of observation data such as relay operation status and calculation results are required. Further, in the department that monitors the operation status of the device, as the observation data, it is sufficient to obtain only the data regarding the restoration of the device abnormality. In this way, since the required data differs depending on the business, in this embodiment, the partner station to be transferred is selected according to the contents of the recording start condition.
For example, when a system fault occurs, the related data is transferred to the A electric station, and when the device is abnormal, the related data is transferred to the B electric station. By doing so, each user can obtain only the information related to his / her own work as the observation data, and the usability can be improved. In addition, there is an effect that the use efficiency of the entire line is improved. Naturally, the same effect can be obtained even in the combination of the control and selection described above.

Further, in the first embodiment, the telephone number of the partner station is stored in the modem 12 so that a plurality of stations can be sequentially called. It may be set from the side. As a means of realization,
Set the telephone numbers 14-1 to 14-n using the keyboard 14-1-5 of the partner station 14-1. The set telephone number is a modem
13-1 and RAM 12 in the data recording means 11 via the modem 12
Written to -2. When the recording data is transferred from the data recording means 11, the modem 12 has a mode of calling each partner station according to the telephone number written in the RAM 11-2. By doing so, each partner station of this observation system can be easily specified from a distance, and the system expandability is improved.

Further, when the partner station is busy or the line is disconnected, it is possible to repeat the data transfer to the same partner station at least once after the lapse of a predetermined time. This observation system may take the form of transferring the observation results of the digital protection control devices installed in a plurality of electric stations to a plurality of observation result output means. This state is shown in FIG. With such a configuration, data may be transferred from a plurality of digital protection control devices at the same time. For example, this is a case where the recording start condition is the occurrence of an external accident. At this time, there is a timing to call the same partner station at the same time, and the data transfer is performed only for the device to which the data link is previously established. In such a case, the data transfer of the device that tried to make the call later cannot be performed. However, according to the present embodiment, the call is made again after the elapse of the predetermined time, so that the reliable data transfer becomes possible and the entire system Has the effect of improving the reliability of. The above has described the case where the line is busy, but the same applies when the line is disconnected. The above control is performed by the data recording means 11.

Further, when the partner station is busy or the line is disconnected, it is possible to stop the data transfer and transfer the data to another partner station. In this case, since the data transfer is repeatedly performed to the same partner station, the time until the data transfer is carried out to all the partner stations becomes long, but in the present embodiment, the data transfer is carried out to another partner station. For,
The time required for data transfer to all partner stations does not become long, and the efficiency of the entire system improves. The above control is performed by the data recording means 11.

Furthermore, it is also possible to use one data transfer means from the partner station to observe a plurality of digital protection control devices. This embodiment is shown in FIG. As a data transfer means, in addition to the modems 12 and 13, a multiplexer
Provide 15 The multiplexer 15 connects the recorded protection observation device and the modem 12, and is included in the data means 12 of FIG. After the connection is completed, data transfer to the partner station is performed as in the first embodiment. As described above, the protection control device to be observed can be selected from the observation processing means 14. In the above embodiment, the mode in which the modem is installed outside the protection control device has been described, but it is also conceivable to install the modem inside the protection control device.

[0020]

As described above, according to the present invention, the data in the digital protection controller is efficiently collected and recorded, and the recorded data is transferred using the telephone line network. It is possible to provide an observation system of a digital protection control device with high functionality, reliability, and economy.

[Brief description of drawings]

FIG. 1 is a functional block diagram showing the basic concept of an observation system according to the present invention.

FIG. 2 is a configuration diagram of an embodiment of an observation system according to the present invention.

FIG. 3 is a diagram showing the operation of the data recording means of the present invention.

FIG. 4 is a diagram showing another embodiment of the present invention.

FIG. 5 is a diagram showing still another embodiment of the present invention.

FIG. 6 is a diagram showing a configuration example of a conventional digital protection control device.

FIG. 7 shows a conventional observation system.

[Explanation of symbols]

1 Analog-to-digital converter 2 Digital arithmetic processing unit 3 I / O 4 Operator interface section 11 Data recording means 12, 13 Data transfer means 14 Observation result output means

Continued front page    (72) Inventor Ryoichi Matsunaga               2-47 Shiobara, Minami-ku, Fukuoka City, Fukuoka Prefecture               Kyushu Electric Power Co., Inc. (72) Inventor Katsuhiko Sekiguchi               No. 1 Toshiba Town, Fuchu City, Tokyo Higashi Co., Ltd.               Shiba Fuchu Factory                (56) Reference JP-A-61-177133 (JP, A)                 JP-A-4-38476 (JP, A)                 JP-A-60-224351 (JP, A)                 JP-A-1-255396 (JP, A)                 JP-A-1-208998 (JP, A)                 JP 63-178722 (JP, A)                 JP-A-52-6950 (JP, A)

Claims (3)

(57) [Claims] 1. An observation system for observing the operation and device state of a digital protection control device for inputting the amount of electricity of a power system and converting it into digital data to perform protection control of the power system, at least provided at its own end. predetermined recording start condition by the output of one of the digital protective control apparatus established Then, a data recording means for recording a predetermined digital data corresponding to the recording start condition, with respect to the recorded plurality of other station the digital data And a data transfer means for transferring the digital data required by the partner station among the digital data through a telephone network when transmitting the data in a predetermined order, and the partner station receives the transferred data. Data receiving means and an observation result output means for outputting an observation result. Observation system of protection control device. 2. The observation system for observing the operation and device state of the digital protection control device according to claim 1, wherein the recording activation condition is a system internal accident or a system external accident , and the data transfer means is an accident. the data corresponding to for a plurality of destination stations in need of such data
An observation system for a digital protection controller characterized by transmitting in a predetermined order . 3. The observation system for observing the operation and device state of the digital protection control device according to claim 1, wherein the data transfer means transfers the data to the plurality of partner stations.
In addition to the above, if there is a request from the other station ,
Observation system of the digital protective control apparatus characterized by transferring the desired digital data from said data recording means according.