JP5092024B2 - Supervisory control system - Google Patents

Description

  The embodiment of the present invention relates to a monitoring control system having a monitoring control support function that is applied to, for example, a water and sewage plant and displays monitoring information indicating a failure or state of the plant on a screen.

  In recent years, plants such as water and sewage plants use a large number of facilities and have complicated operation and process control due to high functionality, automation, wide area, and diversification. For this reason, the amount of information handled in the plant supervisory control system increases, and a high-performance supervisory control function is required.

  In particular, a plant such as a water purification plant, a sewage treatment plant, or a power plant, which is a lifeline of a city, requires a stable service function, high reliability, and operability. As such a plant monitoring control system, in order to monitor the operation state and failure (abnormality) of the plant, a system with a particularly advanced abnormality diagnosis function has been proposed (for example, see Patent Document 1).

Japanese Patent Laid-Open No. 4-175694

  As a plant monitoring and control system in recent years, there has been proposed a system that can process a wide variety of information, have a high abnormality diagnosis function, and monitor plant operating conditions and failures (abnormalities) as the plant becomes more sophisticated. Or has been developed. However, the information provided to plant operators is often simple and limited.

  For example, even if monitoring information indicating a failure or state of plant equipment is displayed on the screen, information indicating the cause of the failure or state change and how it affects subsequent plant operation is not displayed. For this reason, it is difficult for the plant operator to grasp the meaning of many faults (abnormalities) and information only by the information displayed on the monitor control system screen. There are many dependencies. Also, in the current monitoring and control system operation, when a device failure occurs, the failure status is displayed on the screen and an alarm is issued. The cause is investigated by a skilled operator or the like. ing.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a monitoring control support system having a monitoring control support function that allows an operator to easily grasp monitoring information indicating a plant state change, a cause of a failure, and a spread range from the screen. There is.

According to an embodiment, the monitoring control system comprises detecting means for detecting an operating condition or process states of water and sewage plants, based on the detection data obtained from said detecting means, operating condition or process conditions of the water and sewage plant Means for generating history information, means for accumulating the detection data and history information, and means for monitoring a change or failure in the operating state or process state of the water and sewage plant based on the detection data and the history information And a monitoring control support means for extracting the factor of the change or failure, generating monitoring information indicating the factor and the spread range, and displaying the monitoring information on the display screen. The monitoring control support means includes a timer means disposed in a signal transmission unit for transmitting various signals between the elements constituting the system of the water and sewage plant, and a past timer value of a signal transmission time from the timer means. Means for determining an autocorrelation function of the timer value based on the data, and performing a transmission abnormality diagnosis between the corresponding components to determine an abnormality when a certain timer value exceeds a predetermined threshold; and the transmission error diagnosis result is a structure that includes a means for displaying on the display screen.

  According to the embodiment, the factor of the plant state change or failure is extracted, and the monitoring control support function that displays the monitoring information indicating the factor and the spread range on the screen makes it easy for the operator to do so from the screen. Can be provided.

The figure for demonstrating the structure of the monitoring control system regarding this embodiment. The figure which shows an example of the message display screen of the failure and state change of the system regarding this embodiment. The figure which shows an example of the control flow screen regarding 2nd Embodiment. The figure which shows an example of the control flow screen regarding 3rd Embodiment.

  Embodiments of the present invention will be described below with reference to the drawings.

[First Embodiment]
(System configuration)
FIG. 1 is a diagram for explaining a configuration of a monitoring control system according to the present embodiment. The system of this embodiment is a monitoring control system applied to the rainwater drainage process in a sewer plant as a specific example.

  As shown in FIG. 1 (B), the rainwater drainage process has an inflow trunk line 1, an inflow trough 2, and a pump well 3. To introduce. In the pump well 3, the rainwater 10 is pumped out by a plurality of rainwater pumps 5 and discharged to a river or the like through a pipe 7. The discharge of rainwater 10 is adjusted by a plurality of discharge valves 6.

  Water level gauges 8 and 9 are provided in the inflow trough 2 and the pump well 3, respectively. In addition, an inflow gate 4 is provided at the boundary between the inflow trough 2 and the pump well 3 to adjust the amount of rainwater 10 introduced into the pump well 3.

  On the other hand, as shown in FIG. 1A, the monitoring control system of the present embodiment includes a ground rain gauge 15, a rainfall radar 18, a rainfall radar processing device 19, and a central monitoring control device 20. The ground rain gauge 15 measures the rainfall of the rain 17 and transmits a rainfall signal 16 to the central monitoring control device 20. The rain radar processing device 19 processes the radar signal from the rain radar 18 and transmits information indicating the detection result such as the range of the rain 17 to the central monitoring control device 20.

  The central supervisory control device 20 is configured by a computer system including software and hardware, and includes a transmission path (bus) 21, a process control unit 22, a human interface unit 23, and a data server unit 24. The process control unit 22 is a main controller for executing various types of monitoring control of a sewerage plant (here, a rainwater drainage process) to be monitored.

  The human interface unit 23 includes an input operation unit that is operated by an operator to input setting values and the like, and a display output unit that displays various information output from the process control unit 22 and the data server unit 24 on a screen. The data server unit 24 mainly has a function of accumulating information indicating the operation state and process state of the plant and searching for the requested information.

  With the configuration as described above, the central supervisory control device 20 realizes a supervisory control support function that displays information about the plant state and the process state relating to the supervisory control on the screen. Specifically, it is a function that accurately conveys support information such as abnormal (failure) states, state changes, factors, and spillover ranges of plants and processes to the operator.

(System action)
The process control unit 22 takes in the rainfall signal 16 from the ground rain gauge 15, the water level of the inflow trough 2 from the water level gauge 8, and the water level of the pump well 3 from the water level gauge 9, and directly or processes these detection data, The data is transferred to the data server unit 24 via the transmission path 21. Further, the process control unit 22 takes in data indicating the operation state of the rainwater pump 5 and the inflow gate 4, processes these data, and transfers the data to the data server unit 24. The data server unit 24 accumulates each transferred data as information indicating the operation state and process state of the plant.

  The process control unit 22 uses the information indicating the operation state and process state of the plant stored in the data server unit 24 to determine the state change or abnormal state of the plant or process, and based on the determination result, the failure location Then, the monitoring information indicating the factor and the spread range is generated and displayed on the screen of the human interface unit 23.

  Hereinafter, an example of the monitoring information displayed on the screen of the human interface unit 23 will be described with reference to FIG.

  FIG. 2 is a diagram illustrating an example of a message display screen indicating a failure and a state change detected by the process control unit 22. First, as shown in FIG. 2A, when the message 100 is clicked on the message display screen, screen information 101 indicating which part in the wide area system is the source of the failure is displayed. Next, when the operator clicks the selection button indicating failure on the screen shown in FIG. 2A, the system shifts to the system configuration screen 102 shown in FIG. The system configuration screen 102 displays on which route the failure signal has occurred. Here, on the system configuration screen 102, for example, screen information 103 indicating that “secondary treated water feed pump 3” is the source of the failure is displayed. From this source, for example, screen information 106 and 107 for emphasizing signal paths of “secondary treated water facilities” and “sedimentation facilities” are displayed.

  The process control unit 22 determines whether there is an abnormality based on an autocorrelation function related to a timer count value of transmission time in order to perform normal diagnosis on each transmission path on the system configuration screen. Specifically, a normality determination timer is provided in the signal transmission unit of the coupling unit of each element of the system, and transmission abnormality diagnosis between the corresponding components is executed based on past data of the timer value. The process control unit 22 displays the diagnosis result on the screen. That is, the autocorrelation function is obtained based on past data of the timer count value, and when a certain timer count value exceeds a predetermined threshold, the timer count value is regarded as abnormal.

  Further, the process control unit 22 displays the screen information 104 indicating the cause and the spread range of the failure by clicking on a designated portion of the screen information 103 indicating that the failure has occurred. Here, the screen information 105 indicating the part where the cause of the failure spreads is displayed, for example, by changing the color.

  As described above, in the system according to the present embodiment, particularly in a wide-area plant or process, the state change or abnormal state of the plant or process is determined, and based on the determination result, the failure location, the cause, and the spread Monitoring information indicating the range is generated and displayed on the screen of the human interface unit 23. Therefore, the operator can easily grasp the location of the failure of the plant or process, the cause, and the spread range simply by checking the screen. For this reason, for example, it is possible to prevent a serious danger that affects a plant stoppage or the like from a failure in the transmission line, and the like, and it is possible to improve the efficiency of the operator's monitoring work.

[Second Embodiment]
FIG. 3 is a diagram illustrating an example of a control flow screen regarding the second embodiment. The configuration of the entire system is the same as that shown in FIGS. 1A and 1B, and detailed description thereof is omitted.

  The process control unit 22 internally executes a lot of arithmetic processing in monitoring control processing such as PID control, and generates internal information useful for plant operation. Specifically, when feed-forward compensation is combined with PI control, the calculation output result of the feed-forward term can be a means for determining whether the control is normally performed, which is very important from the viewpoint of control. Useful information.

  However, in the conventional supervisory control system, such internal calculation results that are useful for plant operation are not displayed on the screen. Although the arithmetic expression itself used in the internal arithmetic processing is also described in the drawings and the like, it is not displayed on the screen.

  Therefore, as shown in FIG. 3, the system according to the present embodiment is configured to display a control flow screen including a calculation result and a calculation expression of calculation processing inside the process control unit 22 on the screen of the human interface unit 23. It is.

  Specifically, as shown in FIG. 3, when the operator operates the operation unit of the human interface unit 23 on the control flow screen displayed on the display screen and points the calculation output arrow 201 with the pointer 200. The calculation result (display 2) 202 is displayed. Similarly, when the calculation output indicated by the arrow 204 is indicated by the pointer, the calculation result (display 1) 203 is displayed. It also includes a function for deleting the displayed calculation result. In this case, the calculation result may be displayed when an arrow corresponding to the flow of the calculation output signal is indicated by a pointer such as a mouse.

  For example, when the output of the calculation unit indicated by the arrow 205 is indicated by the pointer 200, the corresponding calculation formula 206 is displayed. In this case, as shown in FIG. 3, an arithmetic expression screen 206 is displayed, and the small screen 206 has a function of setting parameters (coefficients) used in the arithmetic expression.

  As described above, in the case of the function of the system according to the present embodiment, the calculation result and the calculation expression of the calculation processing in the process control unit 22 are displayed on the control flow screen displayed on the screen of the human interface unit 23. . Therefore, the operator can easily confirm the calculation result and calculation formula of the internal calculation processing of the system as internal information useful for plant operation on the control flow screen. As a result, it is possible to execute both the detailed grasp of the control contents of the monitoring control system and the adjustment work in the control processing.

  In addition, due to recent water quality regulations and the like, the loop control function in the supervisory control system has become complicated, and not only the conventional simple PID control but also various correction terms and conditions are combined, so only the conventional results. The operator's operation may be hindered only by the contents of the monitoring control system that displays the message. With the system according to the present embodiment, it is easy to accurately grasp the normal and abnormal states of loop control, so that reliable operator operation is possible.

[Third Embodiment]
FIG. 4 is a diagram illustrating an example of a monitor information display screen according to the third embodiment. The configuration of the entire system is the same as that shown in FIGS. 1A and 1B, and detailed description thereof is omitted.

  In a conventional supervisory control system, a very large number of timer values are used, but most of them are used only for control inside the system, and are often not presented to the operator. Further, even if there is a timer value that can be set by the operator, it is not always displayed in an easy-to-understand manner.

  Therefore, the system of the present embodiment displays a timer value and a timer setting screen used for control inside the system on the screen of the human interface unit 23. Here, as shown in FIG. 1 (B), in the rainwater drainage process, the pump well 3 is provided with a plurality of discharge valves 6, and the discharge of the rainwater 10 is adjusted by these.

  When the process control unit 22 uses a start traffic jam timer and a stop traffic jam timer for confirming the opening / closing of the discharge valve 6, as shown in FIG. 4A, settings for setting alarm setting times T <b> 1 and T <b> 2. The screen is displayed on the display screen of the human interface unit 23. Further, as shown in FIG. 4B, the process control unit 22 displays a timer value for confirming the opening and closing of the discharge valve 6 in the starting stroke of the sewage pump 1, for example, and is set by the operator. Displays the timer setting screen. Here, on the display screen shown in FIG. 4B, when the operator indicates a timer symbol portion (here, T1 to T3) with a pointer, the set timer value is displayed. Further, the timer setting screen allows the operator to set a timer value.

  As described above, with the system function of the present embodiment, the operator can check the timer value used in the control inside the system on the display screen of the human interface unit 23. Further, the operator can easily set a timer value used for control inside the system on the display screen of the human interface unit 23. In this case, the setting range of the timer value is limited, and a mechanism that does not hinder the plant operation is provided. In addition, a function may be provided to select an explanation display about the meaning of the timer value. With such a function, the operator can easily grasp the current state of the plant or process on the display screen, and the plant operation can be smoothly advanced.

  Here, the timer count value when the congestion timer functions is accumulated for a predetermined period in the data server unit 24, and the human interface unit 23, the data server unit 24, or the process control unit 22 stores the timer count value. Whether or not there is an abnormal value in the past timer values from the present is determined based on the autocorrelation function of the timer count value. If there is a timer count value determined as an abnormal value, a failure of the corresponding device is considered. The operator can prevent danger such as plant stoppage due to equipment failure by executing the inspection based on the timer count value determined as an abnormal value on the display screen. In other words, it is possible to easily realize the diagnostic function of the equipment used in the plant without using a dedicated diagnostic device.

  As described above, according to the monitoring control system of each embodiment, the operator can confirm information for accurately analyzing and judging the state change and abnormality of the plant or process on the display screen. Abnormalities (failures) can be grasped more quickly and accurately. Accordingly, effective plant operation can be expected, and the burden on the operator can be reduced, and the efficiency of the monitoring control work can be improved. In particular, it is possible to provide judgment information for operating a plant safely and stably to operators who have little experience in plant operation or who operate a wide-area plant with a small number of people. The load can be reduced.

  In addition, although each embodiment assumed the rainwater drainage process as a concrete process, it is not restricted to this, For example, it can apply also to monitoring control systems, such as a waterworks process and a power generation process.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

DESCRIPTION OF SYMBOLS 1 ... Inflow trunk line, 2 ... Inflow trough, 3 ... Pump well, 4 ... Inflow gate, 5 ... Rainwater pump,
6 ... discharge valve, 7 ... piping, 8, 9 ... water level gauge, 10 ... rain water, 15 ... ground rain gauge,
18 ... Rainfall radar, 19 ... Rainfall radar processing device, 20 ... Central monitoring and control device,
21 ... Transmission path (bus), 22 ... Process control unit,
23: Human interface unit, 24: Data server unit.

Claims (5)

Detection means for detecting the operating state or process state of the water and sewage plant,
Based on the detection data obtained from the detection means, means for generating history information of the operating state or process state of the water and sewage plant,
Means for accumulating the detection data and the history information;
Based on the detection data and the history information, the means for monitoring the change or failure of the operation state or process state of the water and sewage plant extracts the cause of the change or failure, and monitoring information indicating the cause and spread range Monitoring control support means for generating and displaying on the display screen,
The monitoring control support means includes
Timer means arranged in a signal transmission unit for transmitting various signals between the elements constituting the system of the water and sewage plant,
Corresponding configuration for obtaining an autocorrelation function of the timer value based on the past data of the timer value of the signal transmission time from the timer means and determining an abnormality when a certain timer value exceeds a predetermined threshold value Means for performing transmission fault diagnosis between elements;
Monitoring and control system characterized in that it comprises a <br/> and means for displaying the transmission abnormality diagnosis result on the display screen. Based on the detection data and the history information, including a control means for performing monitoring control of the plant or process,
The monitoring control system according to claim 1, wherein the monitoring control support means includes means for displaying a calculation result of a control calculation process executed inside the control means on the display screen. The monitoring control support means includes
3. The display device according to claim 2, further comprising: means for displaying an arithmetic expression of control arithmetic processing executed inside the control means and a screen for setting a coefficient of the arithmetic expression on the display screen. Supervisory control system. Based on the detection data and the history information, including a control means for performing monitoring control of the plant or process,
The monitoring control system according to claim 1, wherein the monitoring control support means includes means for displaying a control timer value used inside the control means on the display screen. The monitoring control support means includes
5. The monitoring control system according to claim 4, further comprising means for displaying a setting screen for setting a control timer value used inside the control means on the display screen.

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