JP5881986B2 - Plant operation monitoring device, plant operation monitoring system, and plant operation monitoring method - Google Patents

Description

The present invention relates to a plant operation monitoring device, a plant operation monitoring system, and a plant operation monitoring method .

  FIG. 8 shows a configuration example of a water purification plant. As shown in FIG. 8, the water treatment plant plant takes the water from the river with the water pump 2 and stores it in the landing well 3, injects the flocculant into the treated raw water and mixes them, and slowly mixes the treated raw material. A floc formation pond 4 for forming flocs in water, a sedimentation basin 5 for precipitating suspended solids and flocs, and a rapid filtration basin 6 for filtering treated water are provided. In addition, although the water purification plant plant is also provided with the water purification tank 7 and the distribution reservoir 8, these are demonstrated as an installation here.

  Each facility is provided with so-called field equipment such as sensors such as a water level sensor and a valve regulator. Process quantities measured by field equipment are collected by data collection and storage devices such as DCS (Distributed Control System) and GSA (Gadget Service Adapter), and plant operation monitoring systems consisting of various servers are collected by the data collection and storage device. The operational status of each facility is monitored based on the process volume.

  Specifically, the process amount measured by each field device is buffered in real time for each sampling time of measurement in DCS or GSA allocated and installed for each facility. The buffered process amount is stored in the form of a file or database in a DB server (not shown) connected to the network by a LAN (Local Area Network) or the like, and is appropriately accessed by the central monitoring server or client via the LAN.

  According to the above-mentioned plant operation monitoring system, process amounts such as raw water quality, mixing conditions, flock formation pond operation conditions, sedimentation basin water quality data, etc. acquired from each field device are determined from preset upper and lower limits. If it falls off, it is determined as “abnormal”, and an abnormal alarm is notified to the operator. In this plant operation monitoring system, guidance on the cause and response to the abnormality alarm is also performed.

  In Patent Document 1, a monitoring target amount including at least one of an instantaneous value or a statistic of collected data is compared with a reference value to detect a change state of a process amount, and monitoring information including the detected data is displayed on a screen. There has been proposed a method for accurately detecting an abnormality of a plant at the symptom stage by displaying.

JP 2000-29513 A

  However, according to the above-described prior art, an abnormal alarm is not notified unless the process amount deviates from the upper and lower limit values, and even if a guidance for the abnormal alarm is displayed after the abnormal alarm is notified, It only informs how to deal with the abnormality. On the other hand, according to the technique disclosed in Patent Document 1, statistical processing is performed on the basis of instantaneous value data of various process amounts to accumulate statistical data, and the characteristics are taken into consideration from the long-term tendency of the monitoring target. Since the reference value is automatically generated, it is possible to set the monitoring reference without manpower. However, since the abnormality determination is still made by comparison with the reference value, an abnormality alarm is not notified unless it is out of the reference value. For this reason, it has been desired to provide a technique that enables stable operation of a plant by capturing and notifying a sign before an abnormality occurs.

The present invention has been made in view of the above problems, and its object is to provide a plant operation monitoring apparatus, a plant operation monitoring system, and a plant that enable stable operation of a plant by capturing and notifying a sign before the occurrence of an abnormality. It is to provide an operation monitoring method .

In order to solve the above-mentioned problems, the plant operation monitoring apparatus of the present invention is a plant operation monitoring apparatus in which field devices for measuring a water level that varies according to the elapsed time of a water reservoir constituting a water treatment plant plant are connected via a communication network. The process information acquisition unit that acquires the water level from the field equipment, the past data storage unit that stores the water level acquired by the process information acquisition unit for at least a fixed time, and the abnormality predictor of the water treatment plant the alarm condition indicating the abnormality of the field devices, compares the alarm condition storage unit for storing the conditions for variation state of the water level within the predetermined time, and the alarm condition and variation state of the water level within the predetermined time, the water treatment plant plant if there is a change status of the water level within the predetermined time has deviated on Tei以 away from said alarm condition And abnormality warning detection unit for detecting an abnormality of the field apparatus is abnormal sign, broadcast information to output an alarm when said abnormality warning detection unit the field apparatus wherein an abnormal sign of purification plant plant with abnormality is detected And an output unit.

According to the present invention, the abnormality sign detection unit detects an abnormality of a field device that is an abnormality sign of a water treatment plant plant from an alarm condition that is a fluctuation state of a water level within a predetermined time of a distribution reservoir , and outputs an alarm. Thus, a single distribution reservoir is of course, to detect an abnormality of the field devices is abnormal sign of purification plants plant from changes status of the water level within a predetermined time of distributing reservoir, abnormal same thinking and skilled operators It is possible to automatically determine the sign. Therefore, even a low-skilled operator can respond before an abnormality occurs, improving the reliability of the water purification plant and improving the stable operation of the water purification plant. Further, according to the present invention, an alarm if an abnormality warning detection unit, the water level was not deviate on Tei以 away from alert conditions by comparing the alarm condition and level change condition of within a given time distribution reservoir Since it is automatically output, the load on the operator can be reduced.

The plant operation monitoring apparatus according to the present invention is a communication between a plurality of field devices that detect an operation state and a stop state for each water pump, which is an operation state that fluctuates according to an elapsed time in a plurality of water pumps constituting the water purification plant. A plant operation monitoring apparatus connected via a network, wherein the process information acquisition unit acquires the operation status of the water pump from the plurality of field devices, and the operation status of the water pump that is an abnormal sign of the water purification plant As an alarm condition indicating an abnormality of the water pump , an alarm condition storage unit that stores operation conditions related to each other of the plurality of water pumps , and an operation condition of the water pump and the alarm condition are compared, and an operation condition of the water pump detects the but abnormal operating conditions of the water pump wherein an abnormal sign of purification plants plant when not depart from the alarm condition And abnormality warning detection unit which, further comprising a, a broadcast information output unit for outputting an alarm when said abnormality warning detection unit in the operating conditions of the water treatment plant plant is abnormal sign the water pump abnormality is detected It is characterized by.

According to the present invention, the abnormality sign detection unit detects an abnormality sign of the water treatment plant plant from the operation conditions related to each other of the plurality of water pumps and outputs an alarm. Thus, a single water pump, of course, a driving situation that varies according to the elapsed time in a plurality of water pumps, water purification plants plant from Interactions between the operating state and the stop state in each of the water pump Since an abnormality in the operation status of the water pump, which is an abnormal sign , is detected, it is possible to automatically determine the abnormal sign with the same thought as the skilled operator. Therefore, even a low-skilled operator can respond before an abnormality occurs, improving the reliability of the water purification plant and improving the stable operation of the water purification plant. Further, according to the present invention, the abnormality sign detection unit compares the operation status of the water pump, which is the operation status fluctuating according to the elapsed time in the plurality of water pumps, with the alarm condition, so that the operation status of the water pump is determined from the warning condition. Since the alarm is automatically output when the vehicle deviates, the load on the operator can be reduced.

The plant operation monitoring system of the present invention is a plant operation monitoring system that monitors the operating state of a water treatment plant facility, and measures the water level that fluctuates according to the elapsed time of the facilities that constitute the water treatment plant treatment facility, and The plant operation monitoring device according to the invention is provided.

The plant operation monitoring system of the present invention is a plant operation monitoring system that monitors the operation state of a water treatment plant facility, and is an operation state that varies according to the elapsed time in a plurality of water pumps that constitute the water treatment plant treatment facility . A plurality of field devices for detecting an operation state and a stop state for each water pump and the plant operation monitoring device according to the invention are provided.

The plant operation monitoring method of the present invention uses a field device that measures a water level that fluctuates according to an elapsed time of a distribution reservoir constituting a water treatment plant, and a plant operation monitoring device that is connected to the field device via a communication network. A plant operation monitoring method, wherein a process information acquisition unit of the plant operation monitoring device acquires the water level from the field device, and a past data storage unit of the plant operation monitoring device includes the process A process amount storage step for storing the water level acquired by the information acquisition unit for at least a certain period of time, and an alarm condition storage unit of the plant operation monitoring device indicating an abnormality of the field equipment that is an abnormal sign of the water purification plant plant as the alarm condition storage stearyl for storing conditions for variation state of the water level within the predetermined time Flop and the abnormality warning detection portion of the plant operation monitoring device, wherein the variation state of the water level within a predetermined time is compared with the alarm condition, where the variation situation said alarm condition of the water level within the predetermined time and abnormality warning detection step of detecting an abnormality of the field apparatus wherein an abnormal sign of purification plants plant when not depart on Tei以, broadcast information output unit of the plant operation monitoring apparatus, in the abnormality warning detection unit And an alarm output step of outputting an alarm when an abnormality of the field device, which is an abnormality sign of the water purification plant, is detected.

The plant operation monitoring method of the present invention is an operation state that fluctuates according to the elapsed time in a plurality of water pumps constituting a water purification plant, and detects an operation state and a stop state for each water pump via a communication network. A plant operation monitoring method using a plurality of connected field devices and a plant operation monitoring device connected to the plurality of field devices via a communication network, wherein the process information acquisition unit of the plant operation monitoring device includes: , A process amount acquisition step of acquiring the operation status of the water pump from the plurality of field devices;
The alarm condition storage unit of the plant operation monitoring device stores operation conditions related to each other of the plurality of water pumps as alarm conditions indicating an abnormality in the operation status of the water pump, which is an abnormality sign of the water purification plant. if an alarm condition storing step, the abnormality warning detection portion of the plant operation monitoring device, comparing the alarm conditions and operating status of the water pump, the operating status of the water pump was not depart from the alarm condition An abnormality sign detection step for detecting an abnormality in the operation status of the water pump that is an abnormality sign of the plant, and a notification information output unit of the water treatment plant plant operation monitoring device are the abnormality sign detection unit and the abnormality of the water purification plant plant An alarm output step of outputting an alarm when an abnormality in the operation status of the water pump, which is a sign , is detected.

According to the present invention, a plant operation monitoring device, a plant operation monitoring system, and a plant operation monitoring capable of stable operation of a plant by capturing and notifying a sign before the occurrence of an abnormality from the relevance of process quantities in a plurality of facilities. A method can be provided.

FIG. 1 is a block diagram showing a configuration of a plant operation monitoring system according to an embodiment of the present invention. FIG. 2 is a block diagram showing the configuration of the plant operation monitoring apparatus according to the embodiment of the present invention. FIG. 3 is a flowchart showing the operation of the plant operation monitoring apparatus according to the embodiment of the present invention. FIG. 4 is an explanatory diagram for explaining the correlation analysis of the plant operation monitoring apparatus according to the embodiment of the present invention. FIG. 5 is a graph showing a monitoring example (1) of abnormality sign detection by correlation analysis of the plant operation monitoring apparatus according to the embodiment of the present invention. FIG. 6 is a graph showing a monitoring example (2) of abnormality sign detection by correlation analysis of the plant operation monitoring apparatus according to the embodiment of the present invention. FIG. 7 is a graph showing a monitoring example (3) of abnormality sign detection by correlation analysis of the plant operation monitoring apparatus according to the embodiment of the present invention. FIG. 8 is a diagram illustrating an example of a water purification plant.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as embodiments) will be described in detail with reference to the accompanying drawings. Note that the same number is assigned to the same element throughout the description of the embodiment.

(Configuration of the embodiment)
FIG. 1 is a block diagram showing a configuration of a plant operation monitoring system 1 according to an embodiment of the present invention. A plant operation monitoring system 1 according to an embodiment of the present invention is a system that supports plant maintenance and maintenance work, and includes a field device 10 installed for each facility # 1 to #n, an administrator terminal 20, A plant operation monitoring device 30 and a client terminal 40 are provided.

  Each of the facilities # 1 to #n is provided with a field device 10 including a field server 11 and a process device 12. The plant operation monitoring device 30 connected to these field devices 10 via a WAN (Wide Area Network) 50 detects a plant abnormality sign from the correlation between the process amounts acquired for each monitoring target, and detects a plant abnormality. When a sign is detected, it has a function of outputting a warning to a display terminal of the client terminal 40 or a client terminal 40 connected via the LAN 60.

  The field device 10 includes a field server 11 and a process device 12. The field server 11 includes, for example, a hard disk, a display monitor, and the like as peripheral devices in addition to a basic configuration as a server such as a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (Random Access Memory). Yes. The process equipment 12 is a valve regulator including sensors such as a water level sensor. The field data measured here is collected by the field server 11 and taken in by the plant operation monitoring device 30.

  FIG. 2 is a block diagram showing a configuration of the plant operation monitoring apparatus 30 shown in FIG. As shown in FIG. 2, the plant operation monitoring apparatus 30 includes a control unit 31, an operation unit 32, a storage unit 33, and a display unit 34.

  The operation unit 32 includes, for example, a key to which various functions such as a power key, a call key, a numeric key, a character key, a direction key, a determination key, and a function key are assigned, or a pointing device such as a mouse. When these keys or the mouse are operated by the user, the operation unit 32 generates a signal corresponding to the operation content and outputs the signal to the control unit 31 as a user instruction.

  In the storage unit 33, a past data storage unit (past data DB 330) and an alarm condition value storage unit (alarm condition value table 331) are allocated and stored in the predetermined area. The past data DB 330 is a database in which field data (process amount) acquired from the field device 10 shown in FIG. 1 is accumulated in a time series for a predetermined period. The alarm condition value table 331 is a table in which an alarm condition value of a process amount indicating a plant abnormality sign is set and registered in advance for each facility.

  The storage unit 33 includes, for example, a nonvolatile storage device (nonvolatile semiconductor memory, hard disk device, optical disk device, etc.), a randomly accessible storage device (eg, SRAM, DRAM), or the like.

  The display unit 34 is configured using, for example, an LCD (Liquid Crystal Display Device) or an organic EL (Electro-Luminescence), which is configured by arranging a large number of pixels (a combination of light emitting elements of a plurality of colors) vertically and horizontally. The display unit 34 displays an image corresponding to display target data generated by the control unit 31 and drawn in a predetermined area (VRAM area) of a memory built in the control unit 31 or attached externally.

  The control unit 31 includes, for example, a microprocessor with a built-in memory or an external memory. In this memory, the plant operation monitoring program of the present invention is stored. From the relationship between the process of acquiring the process amount from the plurality of field devices 10 and the process amount of each monitoring target acquired for each facility. A process for detecting an abnormality sign and a process for outputting an alarm when an abnormality sign is detected are programmed and stored.

  For this reason, the control unit 31 includes a main control unit 310, a process information acquisition unit 311, a communication interface unit so that the structure of the plant operation monitoring program that is sequentially read from the memory and executed is expanded and shown. 312, an operation information acquisition unit 313, an abnormality sign detection unit 314, and a notification information output unit 315.

  The process information acquisition unit 311 includes, for example, raw water quality, mixing pond operating conditions, flock formation pond operating conditions, sedimentation pond water quality data, and the like for each monitoring target in each facility from the field device 10 connected via the WAN 50. A large amount of multi-variable process amounts are captured and output to the abnormality sign detection unit 314. The process information acquisition unit 311 substantially controls the interface with the WAN 50, and is necessary by communicating with a plurality of field devices 10 installed for each connected facility based on the communication protocol of the WAN 50. The process amount is acquired sequentially.

  The communication interface unit 312 controls a communication interface between the administrator terminal 20 and the client terminal 40 connected via the LAN 60, and is used in the LAN 60 according to a protocol such as TCP / IP (Transmission Control Protocol / Internet Protocol). Incorporates data related to the objective function set and input by the administrator terminal 20 and outputs the data to the abnormality sign detection unit 314, or includes an alarm generated and output by the plant operation monitoring device 30 based on a request from the client terminal 40 Outputs data such as operating conditions.

  The “objective function” here is data relating to, for example, drug costs, electric energy, and the like, which is indicated by weighting operation costs, and this data is set as an objective function. This objective function may be set and input from the operation unit 32 directly connected to the plant operation monitoring device 30 without depending on the manager terminal 20. In this case, the objective function is captured by the operation information acquisition unit 313 and output to the abnormality sign detection unit 314.

  The abnormality sign detection unit 314 detects a plant abnormality sign from the relevance of the process amounts for each monitoring target acquired for each facility. Specifically, the abnormal sign detection unit 314 indicates the raw water quality, the mixing pond operating condition, the flock pond operating condition, the sedimentation basin water quality data, and the plant indicated by the process amount acquired by the process information acquiring unit 311. By analyzing the reciprocal relationship with the objective function indicated by the weighting of the operational costs, an abnormality sign of the plant before the occurrence of the abnormality is detected. In addition, the abnormality sign detection unit 314 refers to the storage unit 33 (alarm condition value table 331) based on the latest process amount in each facility acquired by the process information acquisition unit 311 so that the latest process amount is determined from the alarm condition value. The alarm output by the notification information output unit 315 is validated when it deviates more than the fixed amount.

  The notification information output unit 315 has a function of outputting an alarm when the abnormality sign detection unit 314 detects an abnormality sign. When notifying an abnormality sign by displaying on the display unit 34, the notification information output unit 315 draws display screen information indicating an alarm in a memory (VRAM: Video RAM) (not shown), and displays the display screen information on the display unit 34. The display screen information is displayed on the display unit 34. The VRAM is assumed to be built in the control unit 31 here, but may be assigned to a partial area of the storage unit 33. The notification may be replaced by voice or the like without depending on the display unit 34, or may be notified to an administrator's mobile phone by e-mail or the like.

  In addition, in order for the main control unit 310 to realize a function in which the control unit 31 detects a plant abnormality sign from the relevance of the process amount for each monitoring target acquired for each facility and outputs an alarm. The above-described sequence control of the process information acquisition unit 311, the communication interface unit 312, the operation information acquisition unit 313, the abnormality sign detection unit 314, and the notification information output unit 315 is performed.

(Operation of the embodiment)
FIG. 3 is a flowchart showing the operation of the embodiment of the present invention, and FIG. 4 is a diagram for explaining the correlation analysis of the embodiment. Hereinafter, the operation of the plant operation monitoring apparatus 30 shown in FIG. 2 will be described in detail with reference to FIGS. 3 and 4.

  In the control unit 31, first, the process information acquisition unit 311 communicates with the field device 10 (field server 11) installed in each facility # 1 to #n, and collects the process amount measured by the process device 12, Then, accumulation is sequentially performed in units of equipment, and the collected large amount of multi-variable process amounts are input to the abnormality sign detection unit 314 (step S11). In addition, objective function data is input from the administrator terminal 20 or the operation information acquisition unit 313 to the abnormality sign detection unit 314.

  The “process amount” referred to here is multidimensional data such as raw water quality, mixing pond operating conditions, floc-forming pond operating conditions, and sedimentation pond water quality data. Raw water quality data includes data such as raw water Tb, raw water pH, raw water color, raw water alkalinity, raw water temperature, etc. Both mixing pond operating condition data and flock formation pond operating conditions include data such as stirring intensity and stirring time. The sedimentation basin water quality data includes sedimentation water quality data such as surface load factor, Tb and pH. The objective function is management data related to, for example, drug costs, electric energy, and the like, which are indicated by weighting of operation costs.

  The abnormal sign detection unit 314 weights the raw water quality, the mixing pond operating conditions, the flock pond operating conditions, the sedimentation basin water quality data, and the plant operating cost indicated by the process amount acquired by the process information acquiring unit 311. By analyzing the correlation (correlation analysis) with the objective function shown, a plant abnormality sign is detected before the occurrence of the abnormality (step S12). For example, as shown in FIG. 4, the abnormality sign detection unit 314 is configured to correlate data with each other within the same facility, or between each data with respect to the process amount and the objective function. A correlation coefficient before and after a predetermined time of data is calculated, and the calculated correlation coefficient is compared with a preset reference value to determine whether the data is normal or abnormal. That is, the abnormality sign detection unit 314 determines that “an abnormality sign is present” when the calculated correlation coefficient deviates from the reference value by a predetermined amount or more. This reference value (alarm condition value) can be set, for example, for each time zone, for each facility, or between facilities, and is stored in the alarm condition value table 331.

  If it is determined that “abnormal sign is present” (step S13 “YES”), the notification information output unit 315 performs an abnormal sign notification (step S14). Then, the abnormality sign detection unit 314 updates the past data DB 330 stored in a predetermined area of the storage unit 33 to perform a trend analysis (step S15), and the notification information output unit 315 displays the result on the display unit 34. (Step S16).

  In detecting an abnormal sign, the abnormal sign detection unit 314 is assigned to and stored in a predetermined area of the storage unit 33 based on the latest process amount in each facility acquired by the process information acquisition unit 311. 331 is referred to. When the latest process amount deviates from the alarm condition value by a predetermined amount or more, the abnormality sign detection unit 314 determines that there is an abnormality sign, and the notification information output unit 315 notifies the abnormality sign.

  Here, with reference to FIG. 5 to FIG. 7, the abnormal sign detection cases (1) to (3) based on the correlation analysis of the abnormal sign detection unit 314 will be described.

  First, the abnormality sign detection case (1) in FIG. 5 will be described. The abnormal sign detection example (1) shows an example of analyzing the relevance of the water level data as the process amount before and after a certain time. 5 (a), (b), (c), (d), and (e) illustrate water level monitoring (case 1) of the reservoir 8, all of which are on the time axis T on the process. A graph in which the water level data H acquired by the information acquisition unit 311 is graduated is shown.

  Fig.5 (a) is a graph which shows the non-change monitoring example of water level data. In FIG. 5A, water level data HTh and LTh indicated by dotted lines are upper and lower limit threshold values stored in the warning condition value table 331 for monitoring water level data unchanged. According to FIG. 5A, the abnormality sign detection unit 314 determines that there is an abnormality sign if the water level data is within the upper and lower threshold range within a certain time indicated by a bidirectional arrow and there is no fluctuation. By detecting this abnormal sign, it is assumed that water level data will be held due to freezing in the tank, leading to avoidance of water outflow or overflow. However, it is necessary to consider changing the monitoring time (constant time) and the threshold depending on the time zone, considering that the fluctuation of the water level is reduced when the amount of water distribution at night is small.

  FIG. 5B is a graph showing a monitoring example of water level data. According to FIG. 5 (b), the abnormality sign detection unit 314 determines that there is an abnormality sign when it detects the repeated rise and fall of the water level within a certain time. In this case, anomalous fluctuations due to clogging of the air release pipe of the throwing water level gauge can be considered. Such monitoring can also be applied to monitoring other process quantities. For example, dirt such as a turbidity meter or an oil content meter can be detected.

  FIG.5 (c) is a graph which shows the distribution tank water level abnormal fall monitoring example. According to FIG.5 (c), the abnormal sign detection part 314 monitors the water level fall condition during a water pump stop, determines that there is an abnormal sign when the amount of decrease within a certain time is larger than normal, and the upper and lower limits By notifying the abnormality sign before reaching the threshold values HTh and LTh, it is possible to avoid water shutoff and water discharge failure. In this case, a large amount of water is expected due to water leakage and digestion during a fire. In FIG. 5C, “Descent Abnormal Width” is an upper and lower limit threshold value stored in the warning condition value table 331 in advance for monitoring the abnormal distribution water level drop.

  FIG.5 (d) is a graph which shows the example of monitoring of a reservoir water level rise (slowing). According to FIG.5 (d), the abnormal sign detection part 314 monitors the water level rise condition during a water pump operation, and determines that there is an abnormal sign when the increase width (slope) within a certain time is larger than usual. In this case, water leakage, large-scale water distribution due to digestion during a fire, pump abnormality, etc. are assumed. In FIG. 5D, “abnormal rise” is an upper and lower limit threshold value stored in the warning condition value table 331 in advance for monitoring the rise in the reservoir water level.

  FIG. 5E is a graph showing an example of “reservoir water level / pump-linked monitoring”. According to FIG. 5 (e), the abnormality sign detection unit 314 determines whether the actual water level when the water pump is stopped is within the pump stop set water level P-OFF ± threshold range, as indicated by the dotted line in the figure. It is monitored whether the actual water level during the operation of the water pump is within the pump operation set water level P-ON ± threshold range. In this case, it is assumed that the pump has stopped urgently due to an abnormality in the water level gauge or an abnormality around the pump. In FIG. 5 (e), the P-OFF ± threshold value and the P-ON ± threshold value are upper and lower threshold values stored in advance in the warning condition value table 331 for “reservoir water level / pump-linked monitoring”. is there.

  Next, the abnormality sign detection example (2) in FIG. 6 will be described. The abnormal sign detection example (2) shows an example of monitoring the operation linked to the automatic pump operation. FIG. 6 (a) shows an example of analyzing the relationship between the flow rate as the process amount and before and after the start of the pump operation. FIG. 6A is a graph showing an example of monitoring an appropriate flow rate of the pump in the distribution reservoir, and the flow rate per hour (m3 / h) is graduated on the time axis (horizontal axis T). Here, the operation by three pumps is illustrated. The abnormal sign detection unit 314 monitors the flow rate according to the number of operating units, and determines that there is an abnormal sign when it deviates from the upper and lower threshold ranges determined for each number of broken lines in the figure. In this case, it is assumed that the pump water supply capacity is reduced due to a malfunction of the pump itself, or a malfunction of the pump surroundings such as a decrease in primary pressure or mixing of pump air.

FIG. 6B is a graph showing an example of rotation operation monitoring during automatic pump operation. On the time axis (horizontal axis T), the operating pumps (No. 1 P ₁ , No. ₂ P ₂ , No. 3 P ₃ ) is shown. The abnormality sign detection unit 314 detects that the pump is operated by the pump of the No. 3 machine P ₃ at the time T ₅ while the rotation operation is originally performed in the order of the pumps P ₁ , P ₂ , P ₃ and the machine number. Is determined to have an abnormal sign.

FIG. 6C is a graph showing an example of interlocking operation monitoring during automatic pump operation. In the case of FIG. 6C, the abnormality sign detection unit 314 originally sends the pump No. 1 (P ₁ ) for the time Td ₁ and the pump No. 2 (P ₂ ) operates in conjunction with the pump P. ₂ detects that the pump P ₂ has an abnormality sign when it is detected that the operation is delayed by the time Td ₂ (Td ₁ <Td ₂ ). FIG.6 (d) is a graph which shows the example of equipment (pump) operation continuation time monitoring. Abnormality warning detection unit 314, a pump when the original, while the pump P ₁ continues operating only during the period To _1, detects that it is (the To 2 in this _case) continuous operation over time To ₁ It is determined that there is a sign of abnormality in Unit 1 (P ₁ ).

  Next, the abnormality sign detection example (3) in FIG. 7 will be described. FIG. 7 is a graph showing an example of appropriate monitoring of the operational water level, and on the time axis (horizontal axis T), the flow rate (m3), pump flow rate (m3), and water level (H1) of the distribution area A are shown. . In the case of FIG. 7, the abnormal sign detection unit 314 performs the water distribution test at the time t1 when the operation pump is switched, and as a result, if the water level is not secured from the current distribution reservoir water level H1, the future demand amount (water distribution amount) ) Will alert you to the danger of draining the reservoir and draining water.

  The abnormality sign detection unit 314 also performs monitoring by correlation analysis regarding PID (proportional / integral / derivative) control related to the flow rate adjustment valve and the pressure adjustment valve. For example, the abnormality sign detection unit 314 indicates the mutual relationship between the flow rate and the valve opening in the case of PID control of the flow regulating valve, and the correlation between the pressure and the valve opening in the case of PID control of the pressure regulating valve. Are analyzed based on alarm condition values stored in advance in the alarm condition value table 331, respectively. Furthermore, the abnormality sign detection unit 314 also monitors the correlation between the flow rate and the pressure by correlation analysis to determine whether there is an abnormality sign.

(Effect of Example)
As described above, according to the plant operation monitoring apparatus 30 of the present embodiment, the control unit 31 (abnormality sign detection unit 314) determines the plant from the mutual relationship of the process amounts for each monitoring target acquired for each facility. Therefore, an abnormal sign is detected from the correlation between the process quantities of a plurality of facilities as well as a single facility. As a result, it is possible to automatically identify plant abnormality signs with the same thoughts as skilled operators, and therefore, even less skilled operators can respond before abnormalities occur, improving plant reliability and ensuring stable plant operation. Peeled off. For this reason, for example, even when a large amount of multi-variable data such as water quality data is combined in a complex manner, the correlation analysis will change the raw water quality, mixing pond operating conditions, floc-forming pond operating conditions, and sedimentation pond water quality data. And the cause of the abnormality. In addition, since a sign is notified before the occurrence of an abnormality, it is possible to set appropriate operating conditions in advance and to visualize the water quality risk.

  Further, according to the plant operation monitoring apparatus 30 of the present embodiment, the abnormality sign detection unit 314 assigns and stores the alarm condition value table 331 that is allocated and stored in a predetermined area of the storage unit 33 based on the latest process amount in each facility. Referring to the latest process amount that deviates from the alarm condition value by more than a predetermined amount, an alarm is automatically output. Driving becomes possible.

(Plant operation monitoring program)
In addition, the plant operation monitoring program of the present invention, for example, as shown in FIGS. 1 and 2, a plurality of field devices 10 that measure the process amount for each monitoring target of equipment are connected via a communication network (WAN 50). This is a plant operation monitoring program that is executed by a computer (a microprocessor built in the control unit 31) on the plant operation monitoring device 30 that has been executed.

  Then, in the computer, as shown in the flowchart of FIG. 3, the correlation between the process of acquiring the process amount from the plurality of field devices 10 (step S <b> 11) and the process amount of each monitoring target acquired for each facility. Therefore, a process for detecting a plant abnormality sign (step S12) and a process for outputting an alarm when an abnormality sign is detected (steps S13 and S14) are executed.

  According to the plant operation monitoring program of the present invention, by executing the program on the computer of the plant operation monitoring device 30, a pre-abnormality sign is detected and notified from the mutual relationship of the process quantities in a plurality of facilities. I can do it. For this reason, it is possible to automatically determine an abnormality sign of a plant with the same thinking as a skilled operator. Therefore, even a low-skilled operator can respond before an abnormality occurs, improving reliability and ensuring stable operation of the plant.

  In addition, according to the above-mentioned embodiment, it illustrated only about the case where it applies to a water purification plant plant, but it can be similarly applied to water intake, water introduction, water supply, water distribution, water supply, sewage treatment, etc. is there.

  As mentioned above, although this invention was demonstrated using embodiment, it cannot be overemphasized that the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiments. Further, it is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Plant operation monitoring system 10 Field device 11 Field server 12 Process equipment 20 Administrator terminal 30 Plant operation monitoring apparatus 40 Client terminal 50 WAN
60 LAN
31 Control Unit 32 Operation Unit 33 Storage Unit 34 Display Unit 310 Main Control Unit 311 Process Information Acquisition Unit 312 Communication Interface Unit 313 Operation Information Acquisition Unit 314 Abnormal Sign Detection Unit 315 Notification Information Output Unit

Claims (6)

A plant operation monitoring device in which field equipment that measures the water level that fluctuates according to the elapsed time of the distribution pond constituting the water purification plant is connected via a communication network,
A process information acquisition unit for acquiring the water level from the field device;
A past data storage unit that stores the water level acquired by the process information acquisition unit for at least a fixed time;
As an alarm condition indicating an abnormality of the on- site equipment that is an anomaly sign of the water purification plant, an alarm condition storage unit that stores a condition for the fluctuation state of the water level within the predetermined time;
Wherein comparing the alarm condition and variation state of the water level within a predetermined time, the variation state of the water level within a predetermined time of the water treatment plant plant when not depart on Tei以 away from said alarm condition abnormality An anomaly predictor detecting unit for detecting an anomaly of the on- site equipment that is an in advance
A notification information output unit that outputs an alarm when an abnormality of the on-site equipment that is an abnormality sign of the water purification plant plant is detected by the abnormality sign detection unit;
A plant operation monitoring apparatus comprising: Plant operation monitoring in which a plurality of field devices that detect an operation state and a stop state of each water pump are connected via a communication network , which is an operation state that fluctuates according to an elapsed time in a plurality of water pumps constituting a water purification plant. A device,
A process information acquisition unit for acquiring the operation status of the water pump from the plurality of field devices;
As an alarm condition indicating an abnormality in the operation status of the water pump, which is a sign of an abnormality in the water purification plant, an alarm condition storage unit that stores operation conditions related to each other of the plurality of water pumps ;
The operation status of the water pump is compared with the alarm condition, and when the operation status of the water pump deviates from the alarm condition, an abnormality in the operation status of the water pump that is a sign of an abnormality in the water purification plant is detected. An abnormality sign detection unit to detect,
A notification information output unit that outputs an alarm when an abnormality in the operation status of the water pump that is an abnormality sign of the water purification plant is detected by the abnormality sign detection unit;
A plant operation monitoring apparatus comprising: A plant operation monitoring system for monitoring the operation state of a water treatment plant facility,
Field equipment for measuring the water level that fluctuates according to the elapsed time of the equipment constituting the water treatment plant treatment facility,
A plant operation monitoring device according to claim 1;
A plant operation monitoring system comprising: A plant operation monitoring system for monitoring the operation state of a water treatment plant facility,
A plurality of on-site devices that detect an operation state and a stop state for each of the water pumps, which is an operation state that fluctuates according to an elapsed time in a plurality of water pumps constituting the water treatment plant treatment facility,
A plant operation monitoring device according to claim 2;
A plant operation monitoring system comprising: A plant operation monitoring method using a field device that measures a water level that fluctuates according to an elapsed time of a distribution reservoir constituting a water purification plant, and a plant operation monitoring device that is connected to the field device via a communication network,
The process information acquisition unit of the plant operation monitoring device acquires the water level from the field device, and a process amount acquisition step,
A process amount storage step in which the past data storage unit of the plant operation monitoring device stores the water level acquired by the process information acquisition unit for at least a fixed time;
The alarm condition storage unit of the plant operation monitoring device stores the condition for the fluctuation state of the water level within the predetermined time as an alarm condition indicating an abnormality of the field equipment that is a sign of abnormality of the water purification plant plant. Steps,
The abnormality warning detection of plant operation monitoring device, wherein comparing the alarm condition and variation state of the water level within a predetermined time, the predetermined variation state of the water level at the time the can on Tei以 away from said alarm condition An abnormal sign detection step for detecting an abnormality of the field equipment that is an abnormal sign of the water treatment plant plant when deviating, and
An alarm output step for outputting an alarm when an abnormality of the on-site equipment, which is an abnormality sign of the water purification plant plant, is detected by the abnormality sign detection unit of the notification information output unit of the plant operation monitoring device;
A plant operation monitoring method comprising: A plurality of field devices connected to each other via a communication network for detecting an operation state and a stop state for each of the water pumps, which is an operation state fluctuating according to an elapsed time in a plurality of water pumps constituting the water purification plant. A plant operation monitoring method using a plant operation monitoring apparatus connected to the plurality of field devices via a communication network,
The process information acquisition unit of the plant operation monitoring device acquires a process amount acquisition step of acquiring the operation status of the water pump from the plurality of field devices,
The alarm condition storage unit of the plant operation monitoring device stores operation conditions related to each other of the plurality of water pumps as alarm conditions indicating an abnormality in the operation status of the water pump, which is an abnormality sign of the water purification plant. An alarm condition storage step;
Abnormality warning detection portion of the plant operation monitoring apparatus, the operation condition of the water pump and comparing the alarm condition, when said driving condition of the water pump is not deviate from the alarm condition the water purification plants plant abnormality An abnormality sign detection step for detecting an abnormality in the operation status of the water pump that is a sign,
The alarm information output unit of the plant operation monitoring device outputs an alarm when the abnormality sign detection unit detects an abnormality in the operation status of the water pump that is an abnormality sign of the water purification plant, and
A plant operation monitoring method comprising:

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