JPH09172727A - Circuit breaker model system of power system simulator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an economical circuit breaker model system in which the opening and the closing conditions of simulation circuit breakers constituting the power system model of a power system simulator can be changed by the control device of the system during a test. SOLUTION: A circuit breaker model system BMS is composed of simulation circuit breakers RM1, etc., and a simulation circuit breaker control device BMC for controlling the simulation circuit breakers RM1, etc. Circuit breaker data DCB for appointing the time of opening and closing the simulation circuit breakers RM1, etc., is transmitted from a system control device SC and stored into the data memory means of the simulation circuit breaker control device BMC. When the simulation circuit breaker control device BMC receives a test starting signal from the system control device SC, it makes a control arithmetic means 1 execute a circuit breaker model control program P2, thereby outputting cut-off signals TS1, etc., or closing signals CS1, etc., to the simulation circuit breakers RM1, etc., in conformity with the circuit breaker data DCB.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power system, which is a constituent element of a power system model of a power system simulator, which is a system for simulating a power system using a power system model simulating the power system. The present invention relates to a circuit breaker model system for a simulator.

[0002]

2. Description of the Related Art FIG. 6 shows a block diagram of a power system simulator PSS which is an example of a conventional power system simulator. As shown in the figure, the power system simulator PSS outputs the power system model PS simulating the power system and various test signals to the power system model PS, and records the behavior of the power system model PS generated by the output signals. It consists of the system controller SC.

The power system model PS includes generator models GM1 and GM2 that simulate a generator and a transformer that boosts and outputs electric power generated by the generator as one unit, and load models LM1 and LM2 that simulate loads. , Simulated transmission lines L1, L2, simulated transmission lines L
Circuit breaker models BM1, BM2, BM3, BM4 inserted at both ends of 1, L2
, And switches SW1 and SW2, etc. that imitate section switches. The system control device SC is, for example, a power line in the case where a ground fault occurs in the power transmission line corresponding to the simulated power transmission line L1 and the circuit breakers connected to both ends of the power transmission line are cut off in order to remove this ground fault. In order to investigate the impact on the circuit breaker model BMi (i
Is the circuit breaker model number, for example, the breaking sequence of BM1) and the time until the circuit breaks starting from the time when the failure occurs as variables, and the dynamics of the generator model and load model, the voltage of the simulated transmission line, Obtain data showing changes in current and so on.

The system control device SC is a device having a control calculation means, and sends the breaker signals TS1 and TS2 to the breaker model BMi.
Etc. to interrupt the circuit breaker models BM1, BM2, etc., input the measured values S1, S2, etc. representing the states of the generator models GM1, GM2, etc., and respond to the output breaking signals TS1, TS2. Record the operating status of models GM1, GM2, etc. It also outputs closing signals CS1, CS2, etc. for closing the circuit breaker models BM1, BM2, etc.

FIG. 7 is a block diagram showing the inside of the circuit breaker model BMi shown in FIG. Circuit breaker model shown
BMi is a simulated circuit breaker RM that simulates the circuit breaker body
It consists of TC. The simulated circuit breaker RM consists of a contact C simulating the contact of the circuit breaker and a switching mechanism COM that opens and closes the contact C. The contact C closes when the value of the closing signal CS to the switching mechanism COM becomes active. Then, it shuts off when the shutoff signal TS to the opening / closing mechanism COM becomes an active value. If the closing signal CS and the cutoff signal TS simultaneously have active values, the operation according to the cutoff signal TS has priority.

The time limit circuit TC is provided with a CR circuit which is a circuit for charging a capacitor through a series resistor,
The capacitor is discharged before starting the time measurement. When the test start signal ST indicating the start of the test is input to the time delay circuit TC, the charging of the capacitor of the CR circuit of the time delay circuit TC is started, and when it is detected that the charging voltage of the capacitor has reached the predetermined voltage, the predetermined At the time when the voltage is detected, the time delay circuit TC operates and outputs the cutoff signal TS to the switching mechanism COM of the simulated circuit breaker RM. Further, the time delay circuit TC is provided with time setting means TCM for setting the operation time until the resistance value of the CR circuit is operated and the shutoff signal is output to the opening / closing mechanism COM. When performing a test using the power system model PS (see FIG. 6), the test condition is that the time from the input of the test start signal ST to the circuit breaker model BMi until the contact C opens is It is set by this time setting means TCM.

FIG. 8 shows a plurality of simulated circuit breakers RMi (i is the number of simulated circuit breaker RM) forming a circuit breaker of the circuit breaker model BMi and a device for giving an operation signal to these simulated circuit breakers RMi. 1 shows an operating time controller TA. The operating time controller TA is a time delay circuit SC that individually controls the simulated pseudo circuit breakers RMi.
i (i is the number of the time limit circuit SC and the number of the simulated circuit breaker RM
(equal to i) are arranged on one operation panel,
With this device, it is possible to set the operating time of the simulated circuit breakers RMi distributed in the power system model PS (see FIG. 6) in one place. As a method for controlling the operation time of the simulated circuit breaker RMi, the operation time control device described above is used.
There is also a method of measuring time by counting clock pulses of a microcomputer without using a CR circuit like TA and performing time control based on the measurement result.

It is convenient to treat the system consisting of the circuit breaker model BMi shown in FIG. 7 or the simulated circuit breaker RMi shown in FIG. 8 and the simulated operation time control device TA as one integrated circuit breaker system. This system is called a circuit breaker model system. With the circuit breaker model system,
The circuit breaker model system can be combined with other generator models, load models, etc. to construct a power system model that simulates various power systems.

[0009]

As described above, in the power system simulator, if the power system model is configured by combining unit models such as a generator model, a load model, and a circuit breaker model system, and various systems, various electric power can be obtained. It is convenient because a model simulating the system can be constructed.
However, in the conventional circuit breaker model system, the operating time of each simulated circuit breaker of the circuit breaker model system must be set on the setting board of the individual circuit breaker model or operating time control device before the test. However, it was not possible to change the control contents of the circuit breaker model from the system controller, such as changing the setting of the simulated circuit breaker operating time from the system controller during the test. In addition, the function to control the simulated circuit breaker directly from the system controller or to input the control signal from the system controller to the operating time controller itself and change the operating time of the simulated circuit breaker based on the input signal. However, the former method has a drawback in that the system controller also requires control of other models, which increases the load on the system controller and makes fine control of the simulated circuit breaker impossible. However, the latter method has a drawback that the production cost of the operation time control device itself is high.

In view of the above circumstances, the present invention provides
It enables to change the test condition of the simulated circuit breaker during the test from the system controller of the power system simulator, and to reduce the manufacturing cost of the power system simulator.
The purpose is to provide a circuit breaker model for a power system simulator.

[0011]

In order to achieve the above-mentioned object, according to the present invention, in a power system simulator including a power system model simulating a power system and a system controller for controlling the power system model, A circuit breaker model system comprising a simulated circuit breaker and a simulated circuit breaker control device for controlling the simulated circuit breaker, which is a part of components of an electric power system model, wherein the simulated circuit breaker control device comprises control calculation means,
It has a program storage means for storing a program executed by the control calculation means to realize the function of the simulated circuit breaker control device, and a data storage means including a storage area for circuit breaker data which is data for giving a condition for operating the simulated circuit breaker. Then, the simulated circuit breaker control device stores the circuit breaker data transmitted from the system controller in the circuit breaker data storage area, and based on the stored circuit breaker data, the simulated circuit breaker opens or closes. It is characterized by outputting a signal.

That is, when performing a test for investigating the effect of opening and closing a simulated circuit breaker using a power system model under a certain test condition, the circuit breaker data necessary for the execution of this test is stored in the system. It is transmitted from the control device to the simulated circuit breaker control device and stored in the circuit breaker data storage area of the simulated circuit breaker control device. The control calculation means of the simulated circuit breaker control device refers to the circuit breaker data stored in the circuit breaker data storage area, executes the program, and opens or closes the simulated circuit breaker.

In the present invention, the circuit breaker data is
It is preferable that the time at which the cutoff signal or the closing signal is output to each of the plurality of simulated circuit breakers is data defined by the time starting from the reference time. That is, the control operation means of the simulated circuit breaker control device sequentially transmits the breaking signal or the closing signal to the simulated circuit breaker every time the time specified by the circuit breaker data elapses according to the order specified by the circuit breaker data.
Each simulated circuit breaker opens or closes sequentially according to the time schedule indicated by the circuit breaker data.

Further, in the present invention, it is preferable that the simulated circuit breaker control device can be used universally for controlling a controlled object other than the power system model by exchanging the program stored in the program storage means. That is, the simulated circuit breaker control device can be used as a control target other than the power system model by exchanging programs.

[0015]

1 is a block diagram of a power system simulator PSSA having a circuit breaker model system BMS as a component, which is an example of an embodiment of the present invention. The power system simulator PSSA consists of a system controller SC and a power system model PSA. The power system model PSA consists of generator models GM1 and GM2, load models LM1 and LM2, and simulated transmission lines L1 and L2.
, Simulated division switches SW1 and SW2 connected at both ends of the simulated transmission lines L1 and L2 to separate the simulated transmission lines.
, Circuit breaker model system BMS. The circuit breaker model system BMS consists of simulated circuit breakers RM1, RM3, RM2, RM4 inserted at both ends of the simulated transmission lines L1, L2 and simulated circuit breakers not shown, and simulated circuit breaker RMi (i is simulated circuit breaker RM Number,
For example, it is composed of a simulated circuit breaker controller BMC that controls RM1), and among the elements that make up the power system model PSA, the elements that are denoted by the same reference numerals as the elements that make up the power system model PS shown in FIG. Are the same as the constituent elements of the power system model PS. Further, the simulated circuit breaker RMi is the same as the simulated circuit breaker RMi having the same symbol shown in FIG.

The system controller SC has the same function as the system controller SC shown in FIG. 6, and is connected to the simulated circuit breaker controller BMC of the circuit breaker model system RMS via the signal line LAN. Communication with the generator model GM1
Communicate with the load model RM1 etc. The simulated circuit breaker controller BMC receives the circuit breaker data DCB indicating the conditions for breaking or closing the simulated circuit breaker from the system controller SC, stores this data, and outputs a test start signal from the system controller SC. When you input, the breaker control program P2, which refers to the breaker data BCD, is executed by the control calculation means 1 to open the simulated breaker RMi according to the breaker data BCD. The break signal TSi (i is the break signal number , The same number as the simulated circuit breaker RMi) or the closing signal CSi (i is the number of the closing signal and is the same number as the simulated circuit breaker RMi) that closes the simulated circuit breaker RMi is output to the simulated circuit breaker RMi.

FIG. 2 shows the simulated circuit breaker control device shown in FIG.
A block diagram showing the inside of the BMC is shown. As shown in the figure, the simulated circuit breaker control device BMC has control arithmetic means 1, program storage means 2, data storage means 3, input device 4 for inputting operation signals and test conditions, data held by the simulated circuit breaker control device BMC. Is displayed on the display device 5, the system control device SC (see FIG. 1), the first input / output unit 6 which is a circuit unit for inputting / outputting data to / from the signal line LAN, and the signal to / from the simulated circuit breaker. It is composed of a second input / output unit 7 which is a circuit portion for communication.

The control calculation means 1 is a program storage means 2
Execute the program stored in to realize the function of the simulated circuit breaker control device BMC. The data storage means 3 is a storage means composed of a RAM capable of freely reading and writing data in synchronization with the operation of the control calculation means 1.
The data storage unit 3 stores an area for storing data to which the control calculation unit 1 refers when executing the program,
An area or the like for storing the data generated by the control calculation means 1 is secured. The DCB is provided in the data storage means 3,
This is the area to store the breaker data DCB. In the following description, the area for storing data and the data stored in this area are denoted by the same reference numerals. Further, it is assumed that the program realizes the function realized by the control calculation means 1 executing the program.

The program storage means 2 stores a program for inputting a signal from the input device 4, a program for displaying data on the display device 5, a signal via the first input / output unit 6, the second input / output unit 7, and the like. Basic program P1 that realizes the basic functions of simulated circuit breaker control device BMC, such as a program that controls input / output, and controls the simulated circuit breaker that outputs a breaking signal to the simulated circuit breaker or outputs a closing signal. The circuit breaker model control program P2 is stored.

FIG. 3 is a flow chart showing the operation of the simulated circuit breaker controller BMC shown in FIGS. 1 and 2.
FIG. 3A is a flowchart showing the operation of the simulated circuit breaker control device BMC at the start of the test. As shown in the figure, when the simulated circuit breaker controller BMC receives a test start signal from the system controller SC, it executes process F0 and inputs the circuit breaker data that specifies the opening and closing of each simulated circuit breaker. Circuit breaker data area DCB of storage means 3 (FIGS. 1 and 2)
(See).

FIG. 3B shows the circuit breaker data DCB for the simulated circuit breaker group of the simulated circuit breaker controller BMC in the test execution process.
6 is a flowchart showing an operation in the case of shutting off based on the above. The simulated circuit breaker controller BMC is
When the signal from the system control device SC is detected, the process F1 is executed, and it is determined whether the input signal is the cutoff signal of the simulated circuit breaker group, and if it is the cutoff signal, the process F2 is executed. Start the time measurement and determine whether the time measurement result has reached the set time specified by the circuit breaker data DCB of each simulated circuit breaker. If there is, a cutoff signal TSi to the simulated circuit breaker RMi is output in process F4. In the process F1, it is detected that the cutoff signal is not input, or when there is no simulated circuit breaker that has reached the set time in the process F3, another process F5 is executed, and thereafter, the process F1 to the process F1 at predetermined intervals. The process F5 is executed to sequentially shut off the simulated circuit breaker according to the breaking data.

FIG. 4 shows an example of the circuit breaker data DCB that defines the control of the simulated circuit breaker controller BMC shown in FIGS. 1 and 2. FIG. 4A is a timing chart showing the operation of the simulated circuit breakers RM1, RM2, RM3 (see FIG. 1) given by the circuit breaker data DCB. In the figure, the horizontal axis shows the passage of time and the vertical axis shows the values of the cutoff signals to the simulated circuit breakers. A value of 0 represents a state in which a signal for shutting off the simulated circuit breaker RMi is not input, and a value of 1 represents a state in which a signal for shutting off the simulated circuit breaker is input. T0 is simulated circuit breaker group RM1, RM2, RM
It is the time when the cutoff command is output in 3, and time T0 is the starting point of time measurement. That is, the time T0 corresponds to the time 0.
T1, T2, T3 represent time measured from time T0. This timing chart is simulated by the simulated circuit breaker controller BMC.
It indicates that a cutoff signal is output to RM1 at time T1, a cutoff signal is output to simulated breaker RM2 at time T2, and a cutoff signal is output to simulated breaker RM3 at time T3.

FIG. 4 (b) is circuit breaker data for giving outputs to the simulated circuit breakers RM1, RM2, RM3 shown in FIG. 6 (a).
It is the figure which showed the content of DCB. As shown in the figure, an address for storing the circuit breaker data of the simulated circuit breakers RM1, RM2, RM3 is secured in the circuit breaker data DCB area. That is, the memory address corresponding to each of the simulated circuit breakers RM1, RM2, RM3 is secured, and the address corresponding to each of the simulated circuit breakers RM1, RM2, RM3 is, for example, the time T0 shown in (a) of FIG. 50ms, 100ms, and 150ms of the time measured from is stored. As the circuit breaker data DCB, instead of the times T1, T2, T3, the time intervals t1, t2, t3 (see (a) in Fig. 4) in which the simulated circuit breakers RM1, RM2, RM3 sequentially break May be adopted.

FIG. 5 shows a circuit breaker model BMAi when the simulated circuit breaker control device BMC of the circuit breaker model system BMS of the present invention shown in FIG. 1 is applied to the conventional circuit breaker model BMi shown in FIG. Indicates. Circuit breaker model BMAi is a circuit breaker model
The circuit that sends the cutoff signal TS from the BMi time-delay circuit TC to the simulated circuit breaker RM is provided with a branching signal terminal TST that is directly connected to the outside, and the simulated circuit breaker RM is directly connected from the cutoff signal terminal TST.
It is possible to input the cutoff signal TS to. That is, even in the power system model in which the conventional breaker model BMi is installed, the breaker signal terminal TST as the breaker model BMAi is added to the breaker model BMi installed in this system,
By simply installing the simulated circuit breaker control device BMC, it is possible to construct a power system simulator that can control the opening and closing conditions of the simulated circuit breaker similar to the power system simulator PSSA shown in Fig. 1 from the system controller SC.

[0025]

As described above, the circuit breaker model of the electric power system simulator of the present invention is a power system simulator including a power system model simulating an electric power system and a system controller for controlling the electric power system model.
A circuit breaker model system comprising a simulated circuit breaker and a simulated circuit breaker control device for controlling the simulated circuit breaker, which is a part of components of a power system model, and the simulated circuit breaker control device comprises a control calculation means and a control calculation. Program storage means for storing a program executed by the means to realize the function of the simulated circuit breaker control device, and data storage means including a storage area for circuit breaker data which is data for giving a condition for operating the simulated circuit breaker, The simulated circuit breaker control device stores the circuit breaker data transmitted from the system controller in the circuit breaker data storage area, and based on the stored circuit breaker data, a simulated breaker opening signal or a closing signal that closes the simulated circuit breaker. Output.

Therefore, according to the circuit breaker model system of the present invention, a test condition for opening and closing the simulated circuit breaker is given from the system controller to the circuit breaker model system to open and close the simulated circuit breaker during the test process. Since the test can be performed, it becomes possible to open and close the simulated circuit breaker under various test conditions from the system control device and perform the simulation of the power system under various conditions.

Further, in the invention of claim 2, in the circuit breaker model system of the present invention, the circuit breaker data is the time when the breaking signal or the closing signal to each of the plurality of simulated circuit breakers is output, which is the reference time. Since the data is defined by the time taken as the starting point, the system controller controls the tests in which the individual simulated circuit breakers that make up the simulated circuit breaker group are sequentially interrupted and turned on at a predetermined time in the order required by the test. Can be done by a simple signal from.

Further, in the invention of claim 3, in the circuit breaker model system of the present invention, the simulated circuit breaker controller is:
By exchanging the program stored in the program storage means, the program can be used for general control of a controlled object other than the power system model. Therefore, the hardware of the simulated circuit breaker control device, which is a main component of the circuit breaker model system, Can be shared as a general-purpose model. For example, the simulated circuit breaker control device of the present invention can be shared as a general-purpose programmable controller, so that it can be mass-produced as a multipurpose controller and can be supplied at a low price.

[Brief description of the drawings]

FIG. 1 is a block diagram of a power system simulator including a circuit breaker model system that is an example of an embodiment of the present invention.

FIG. 2 is a block diagram of a simulated circuit breaker controller of the circuit breaker model system shown in FIG.

FIG. 3 is a flowchart showing the operation of the simulated circuit breaker control device.

FIG. 4 is an explanatory diagram of an example of circuit breaker data.

5 is a block diagram of a circuit breaker model that enables connection to the simulated circuit breaker control device shown in FIG.

FIG. 6 is a block diagram of an example of a power system simulator including a conventional circuit breaker model.

7 is a block diagram of the circuit breaker model shown in FIG.

FIG. 8 is a block diagram showing another example of a circuit breaker model.

[Explanation of symbols]

 PSSA power system simulator SC system controller BMS circuit breaker model system PSA power system model RM1, RM2, RM3, RM4 simulated circuit breaker GM1, GM2 generator model LM1, LM2 load model

Claims (3)

[Claims] 1. A simulated circuit breaker and a simulated circuit breaker, which are constituent elements of the power system model, in a power system simulator including a power system model simulating the power system and a system controller for controlling the power system model. A circuit breaker model system comprising a simulated circuit breaker control device, wherein the simulated circuit breaker control device stores a program for executing the function of the simulated circuit breaker control device by executing the control calculation means and the control calculation means. Means for storing the circuit breaker data, which is data for giving a condition for operating the simulated circuit breaker, and the simulated circuit breaker controller transmits the circuit breaker data transmitted from the system controller. Stored in the storage area of the circuit breaker, and based on the stored circuit breaker data, output the breaking signal to open the simulated circuit breaker or the closing signal to close the simulated circuit breaker. A circuit breaker model system for a power system simulator, which is characterized by applying force. 2. The circuit breaker model system for a power system simulator according to claim 1, wherein the circuit breaker data is a time at which a breaking signal or a closing signal is output to each of the plurality of simulated circuit breakers, and a reference time is used. A circuit breaker model system for a power system simulator, characterized in that the data is specified by the time taken as a starting point. 3. The circuit breaker model system for a power system simulator according to claim 1, wherein the simulated circuit breaker control device controls programs other than the power system model by exchanging programs stored in the program storage means. A circuit breaker model system for a power system simulator, which is characterized in that it can be used for general purposes.