JPH11219212A - Piping system supervisory and controlling system for hydraulic power plant - Google Patents

Abstract

PROBLEM TO BE SOLVED: To model the equipment of a piping system, to easily supervise and control the piping system and to improve the operation efficiency of supervisory and control. SOLUTION: The controlled system element of the piping system is replaced with the controlled system element of a power system, the data base of the piping system is converted to the data base of the power system and processings such as a supervisory and control processing, an operation procedure processing, a data maintenance processing and a simulation processing, etc., executed by the man-machine processing of the power system are made to be in common to the execution of the man-machine processing of the piping system. In this case, at the time of replacing the controlled system element of the piping system with the controlled system element of the power system, in the case that the controlled system element of the power system corresponding to the controlled system element of the piping system is not present, it is stipulated by the combination of the plural equipments of the power system.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a monitoring and control system for monitoring and controlling various facilities of a hydroelectric power plant, and more particularly to a technique for monitoring and controlling piping system facilities.

[0002]

2. Description of the Related Art FIG. 5 shows a schematic system configuration of a monitoring and control system of a hydroelectric power plant. The targets of monitoring and control of hydropower plants are broadly classified into dam facilities, power generation facilities, power system facilities, and piping system facilities. The monitoring and control items for dam equipment, power generation equipment, power system equipment, and piping system equipment include the following.・ Dam equipment: Monitoring of dam water level, control of gate opening, etc. ・ Generator equipment: Generator operation / control, generator emergency stop, etc. ・ Power system equipment: Circuit breaker / disconnector opening / closing control, etc. ・ Piping system equipment: Valve opening, pump operation / stop, etc. The monitoring and control system of these facilities is composed of a computer system, which collects the status through the telecon master station, slave station, etc., and efficiently generates power based on the monitoring results. The intended control is being performed. Among them, the power system equipment is the centerpiece of the monitoring and control system, and the system monitoring function, automatic operation function, equipment data maintenance function, simulation function, statistical processing function, prediction function, etc. have already been technically established. , The content is advanced.
On the other hand, the piping system equipment has not been conventionally handled by the monitoring and control system. By the way, the piping equipment is responsible for cooling the bearings of the power plant and controlling the lubricating oil, and can be broadly classified into the following four types.・ Air piping used to generate hydraulic pressure ・ Hydraulic piping used to open and close the guide vanes ・ Lubricating oil piping used to supply lubricating oil to various bearings ・ Cooling water piping used to cool generators and various bearings As shown in FIG. However, in an actual piping system, the respective systems are interconnected, have a considerably complicated configuration, and the number of piping is enormous. In addition, since the piping system is directly related to the basic control of power generation, and a malfunction of the piping system stops power generation, it can be said that monitoring and control thereof is very important. However, conventionally, there has been no established technique for monitoring and control of this piping system as compared with that of other facilities in terms of monitoring and control. This is because, due to the complexity of the piping system, a means for relatively simple and inexpensive operation procedures or simulations in the monitoring control system could not be established. In order to realize the operation procedure table and the simulation function of the piping system by the computer system, it is necessary to model the configuration of the piping system and register it as a database in the computer. Known examples for modeling the configuration of a piping system include the techniques described in JP-A-48-29185 and JP-A-63-271573, but have the following problems. (1) Piping system equipment includes a pressure distribution valve, a three-way valve, and the like. These devices are equipment for changing the direction of flow of oil, air and the like. The method of replacing these facilities with electric circuits is not specified. (2) Both of the known examples are for calculating the fluctuation of the pressure in the pipe. If the electric circuit of the known example is adopted, the operation procedure table and the amount of software development for simulation are enormous, which is not economical.

[0003]

Problems to be Solved by the Invention Conventionally, the maintenance work of the generator and the auxiliary equipment requires the work of the piping system. However, as described above, since the establishment of the monitoring and control technology of the piping system has been delayed, The work was carried out according to the following desk-centered procedures. -The operator creates an operation procedure table on the desk.・ Simulate the pressurized state of the piping system after equipment operation according to the operation procedure table on a desk.・ Perform actual operations based on the simulation results on the desk. However, in this case, there are the following problems. In other words, the amount of work of the operator based on the creation of the procedure table and the desk simulation is very large. In addition, since the examination is performed on a desk, there is a large factor that a mistake in creating a procedure may occur. On the other hand, with the increase in the size of hydroelectric power plants, etc., the demand for more efficient operation of monitoring and control of piping systems has been increasing, and it is important to realize them as soon as possible.

[0004] It is an object of the present invention to model the facilities of a piping system, to easily realize monitoring and control of the piping system, and to improve the operation efficiency of the monitoring control.

[0005]

The object of the present invention is to replace a control target element of a piping system with a control target element of a power system, convert a database of a piping system into a database of a power system, and perform a man-machine process of the power system. The problem is solved by making the monitoring control process, the operation procedure process, the data maintenance process, the simulation process, and the other processes executed by the process common to the execution of the man-machine process of the piping system. Here, when replacing the control target element of the piping system with the control target element of the power system, if there is no control target element of the power system corresponding to the control target element of the piping system, it is defined by a combination of a plurality of devices of the power system. . Also, a piping system operation procedure is created graphically and interactively on the CRT screen. Then, the control target elements of the piping system are controlled according to the piping operation procedure, and the CRT is controlled.
The response result is displayed on the screen. On the other hand, a simulation of the piping operation procedure is performed, and the simulation result is responsively displayed on the CRT screen.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a piping system monitoring and control system of a hydroelectric power plant according to an embodiment of the present invention. CPU1
00 performs monitoring control processing, operation procedure processing, data maintenance processing, simulation processing, and other processing of the piping system. The main memory 200 stores programs and data for executing these various processes. When the piping system diagram is input from the input means 500, a screen is displayed on the CRT 400, and the man-machine I.D. F. The various processes described above are executed according to an instruction from 300. Necessary information is printed out via the print output unit 600.

A feature of the present invention is that, by replacing a control target element of a piping system with a control target element of a power system, an already developed technology related to a power system, which is advanced in technology, is used for the piping system, and an operation procedure is easily performed. The task is to create tables and simulate. FIG. 4 shows an example of replacement of facility data of a piping system in the present invention. In FIG. 4, a pressure distribution valve 1, a strainer switching three-way valve 2, a valve 3, a draft 4, and valves 5 to 8 which are control target elements of a piping system are a composite model 1 and a composite model 2 which are control target elements of an electric power system, respectively. , Circuit breaker 3, transformer 4, disconnector 5, 6, circuit breaker 7,
Replace with 8. Here, the control target elements of the power system are:
As shown in FIG. 7, it is composed of devices such as a breaker / disconnector or a transformer, and a transmission line and a bus connecting them. On the other hand, the control target element of the piping system is composed of devices such as valves and piping connecting them, as shown in FIG. As described above, the power system and the piping system have similar configurations, and if attention is paid to this, the piping system can be represented by the power system. That is, by replacing the equipment of the piping system with the equipment of the power system, the already established power system architecture can be applied to the piping system without developing a new architecture especially for the piping system. In this embodiment, as shown in FIG. 4, by replacing the control target element of the piping system with the control target element of the power system, the power system-related developed technology, which has advanced technology, can be used for the piping system. In addition, it is possible to create a work procedure table and a simulation for the piping system.

FIGS. 9 to 13 show an example in which equipment in a piping system is replaced with equipment in a power system. First, as the simplest example 1, FIG. 9 shows a manual valve. The manual valve has a function of connecting or shutting off the flow of the pipe, and its state is represented by “open” and “closed”. Since this can correspond to "on" and "off" of a circuit breaker in a power system, a manual valve is replaced with a circuit breaker.

Next, a more complicated example 2 will be described. In the piping system, there is a device called a pressure distribution valve, which switches the flow of the piping depending on whether there is pressure at the upper part of the pressure distribution valve or pressure at the lower part of the pressure distribution valve as shown in FIG. The device corresponding to the pressure distribution valve does not exist as a single device in the power system. Further, a three-way valve, a strainer switching three-way valve, and the like do not exist as independent devices in the power system. this is,
This is because there is no device in the power system that can independently change the flow direction. However, it can be replaced by combining a plurality of devices in the power system. That is, as shown in FIG. 11, a power system model of a combination of a circuit breaker and a disconnecting switch can be used. In FIG.
Piping A, Piping B, and Piping C of the pressure distribution valve correspond to the transmission line, instep bus, and line B at the line end of the electric system, respectively. Specified by the combination of the open / closed state of the container. The power system model including the circuit breaker and the disconnector is often used as a circuit component of a substation. As shown in FIG. 12, when there is pressure at the upper part of the pressure distribution valve, pressure is applied to the lower part of the pressure distribution valve as shown in FIG. In this case, it corresponds to the instep disconnector “ON” and the second party disconnector “OFF”. Similarly, all the devices in the piping system can be replaced with all the devices in the power system. In other words, gas, oil,
It replaces the flow of water with the flow of electricity.

Thus, as shown in FIG. 4, the equipment group of the piping system can be represented as the equipment group of the power system. Here, the pressure distribution valve and the strainer switching three-way valve can be replaced with a power system model consisting of a circuit breaker and a disconnector, the valve can be replaced with a circuit breaker or a disconnector, and the draft can be replaced with a transformer. Can be treated as a power system problem. In this way, the monitoring and control of the piping system can be easily realized using the conventional power system monitoring and control system.

FIG. 2 is a functional block diagram of the monitoring control system of the present invention, showing the common processing of the electric power system / piping system and the database unit. In FIG. 2, in the power system specific processing, the power system monitoring and control system uses a man-machine to perform various processing of the power system, that is, monitoring and control processing, operation procedure processing, data maintenance processing, simulation processing, and other processing in a database. When the system is executed with reference to the above, the monitoring control system of the present embodiment performs the processing of the piping system / power system conversion (the processing of replacing the equipment of the piping system with the equipment of the power system) and converts the piping system data. By converting the data into the power system data, the specific processing of the piping system is executed in the same manner as the various processes of the power system using the power system monitoring and control system. As described above, in this embodiment, the database of the power system and the various processes are shared by the monitoring and control system of the piping system, thereby contributing to simplification of the system and increasing the efficiency of system development.

Next, with reference to FIG. 3, a description will be given of the operation procedure creation function and the simulation function of the piping system of the present invention. The square frame in FIG. 3 indicates the display screen of the CRT 400, and the oval frame indicates the function of the CPU 100. The CRT 400 is provided with a piping system screen window 10 for displaying a piping system and an operation procedure screen window 20 for displaying an operation procedure. In addition, on the piping system screen 10, an actual device response display 1 of the actual system is displayed.
1 and the responsive display 12 of the simulation system. When the piping system diagram is input from the input means 500, C
The piping system screen 10 is displayed on the RT 400. On the piping system screen 10, the equipment to be executed according to the operation procedure is designated by the man-machine I.M. F. When a selection is made by the device 300 (device selection function 30), an operation item corresponding to the device is displayed as a pop-up menu 40 on the screen. When a selection item to be operated is similarly selected from the pop-up menu 40 (operation selection function 50), the content (equipment name, equipment name, operation content, time, etc.) is added to the operation procedure table 20. Here, the scheduled execution time is also set. In this way, the devices to be operated are sequentially selected and the operation contents are set, and the operation procedure table 20 is graphically and interactively created on the CRT screen. And this operation procedure,
At the designated time, the device control execution function 60 in the CPU 100 is automatically executed by software (or executed according to an execution instruction of an operator), and when the actual device is controlled, the response result of the actual device is displayed. It is displayed one after another on the piping system screen. The result of the execution of the operation procedure is automatically created as an operation item report, and is printed out via the printout means 600. If there is a logical contradiction in the operation procedure, a warning message is displayed on the content, and correction is made each time. On the other hand, when performing simulation confirmation before controlling the actual device, the simulation function 70 of the operation procedure table 20 is used. A simulation execution button 21 or the like is provided on the operation procedure screen, and when this button is operated, a simulation function 70 in the CPU 100 performs simulation execution by software, and simulation results are displayed one after another on the piping system screen. System status and confirm that there are no problems.
If a state change or the like occurs in the real system during the simulation, the simulation is automatically stopped,
The display returns to the actual system display. As described above, according to the present embodiment, the creation of the operation procedure table is significantly improved compared to the conventional paper-based creation on a desk, and the logical inconsistency check and the simulation before the actual device control are performed. This can contribute to improving the reliability of the operation procedure itself. Also, a method of automatically creating an operation procedure by storing an operation procedure creation algorithm in advance can be adopted.

[0013]

As described above, according to the present invention,
Since the equipment of the piping system is replaced with the equipment of the power system, and the data of the piping system is converted into the data of the power system and handled, the monitoring and control of the piping system can be easily realized. In addition, the developed monitoring and control function of the power system, the operation procedure creation function, the data maintenance function, the simulation function, etc. can be used for the piping system, and the operation of the piping system of the hydroelectric power plant is largely automated, improving efficiency. Along with
The reliability is also significantly improved. In addition, operation procedure table creation is CR
It can be executed graphically and efficiently on T, and the simulation of operation procedure execution can be automatically executed.
Procedure error correction can be performed in advance.

[Brief description of the drawings]

FIG. 1 is a piping system monitoring control system of a hydroelectric power plant according to an embodiment of the present invention.

FIG. 2 is a functional block diagram of the monitoring control system of the present invention.

FIG. 3 is an explanatory diagram of creating an operation procedure and a simulation of the piping system of the present invention.

FIG. 4 is an example of replacement of equipment data of a piping system in the present invention.

FIG. 5 is a configuration example of a monitoring and control system for a hydroelectric power plant.

FIG. 6 shows an example of a piping system of a hydroelectric power plant.

FIG. 7 is an explanatory diagram of power system equipment.

FIG. 8 is an explanatory diagram of piping system equipment.

FIG. 9 is an explanatory diagram of replacement of a manual valve with a circuit breaker.

FIG. 10 is an explanatory view of replacement of a pressure distribution valve with a power system composite device model (part 1).

FIG. 11 is an explanatory diagram of replacement of a pressure distribution valve with a power system composite device model (part 2).

FIG. 12 is an explanatory diagram of replacement of a pressure distribution valve with a power system composite device model (part 3).

FIG. 13 is an explanatory diagram of replacement of a pressure distribution valve with a power system composite device model (part 4).

[Explanation of symbols]

1 ... pressure distribution valve, compound model, 2 ... strainer switching three-way valve,
Composite model, 3 ... Valve, circuit breaker, 4 ... Draft, transformer, 5, 6 ... Valve, disconnector, 7,8 ... Valve, circuit breaker, 10 ... Piping system screen window, 11 ... Response display on actual equipment, 12 ... Simulation response display, 20 ... Operation procedure screen window, 21 ... Simulation execution button, 30 ... Device selection function, 40 ... Popup menu, 50 ... Operation selection function, 60 ... Device control execution function, 7
0: simulation function, 100: CPU, 200:
Main memory, 300 ... Man machine I. F. , 400 ...
CRT, 500: piping system diagram input means, 600: print output means

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Takashi Uchida 5-2-1 Omikacho, Hitachi City, Ibaraki Prefecture Inside the Omika Plant, Hitachi, Ltd.

Claims (5)

[Claims] The present invention relates to a monitoring control process and an operation procedure in which a control target element of a piping system is replaced with a control target element of a power system, a database of a piping system is converted into a database of a power system, and a man-machine process of the power system is executed. Processing, data maintenance processing, simulation processing,
A piping system monitoring and control system for a hydroelectric power plant, characterized in that other processing is common to execution of man-machine processing of a piping system. 2. The method according to claim 1, wherein when the control target element of the piping system is replaced with the control target element of the power system, when there is no control target element of the power system corresponding to the control target element of the piping system, A piping system monitoring and control system for a hydroelectric power plant, which is defined by a combination of a plurality of devices. 3. The hydraulic power plant according to claim 1, wherein the piping system monitoring and control system has a function of graphically and interactively creating a piping system operation procedure on a CRT screen. Piping system monitoring and control system. 4. The piping system monitoring control system according to claim 3, wherein the piping system monitoring and control system has a function of controlling a control target element of the piping system in accordance with a piping operation procedure, and displays a response result on a CRT screen. The monitoring and control system of the piping system of the hydropower plant. 5. The hydraulic power plant according to claim 3, wherein the piping system monitoring and control system has a function of executing a simulation of a piping operation procedure, and displays a simulation result on a CRT screen. Piping system monitoring and control system.