JPH067731B2 - Automatic creation method of system operation command procedure in electric power system - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention is intended for carrying out maintenance, inspection, etc. of equipment constituting an electric power system, by artificially stopping the equipment, and for repairing and restoring after inspection. The present invention relates to a method for automatically creating a system operation command procedure.

[Technical background of the invention] Generally, an electric power system includes switches such as circuit breakers and disconnectors, and equipment such as transformers, power transmission lines, busbars, and phase-adjusting equipment.
These facilities need to be stopped for maintenance work or operation of the electric power system, and those that have been stopped must be restored thereafter. And the equipment to be stopped (hereinafter,
The operation to stop is called "stop operation", the operation to recover is called "recovery operation", and these operations are composed of a reproducible number of "procedure steps". There is. It is necessary to perform these operations in a predetermined order according to the purpose, and the equipment stop operation and restoration operation are performed in accordance with the ordered series of system operation command procedures.

By the way, conventionally, a system operation command procedure for a facility to be stopped is created by an operator in advance by creating a series of system operation command procedures for each facility to be stopped, or a system operation command that is patterned in advance for each facility to be stopped. When the procedure data is stored and the system operation command procedure for stopping / restoring the same stop target equipment is created, the stored operation is reused to create the system operation procedure.

[Problems of background art] However, in such a method, in a large-scale and complicated electric power system, a huge amount of stored information is required to cope with stop / recovery operations of equipment constituting the system. In addition, considering a case where a plurality of equipment to be stopped (for example, a transformer and a power transmission line) are operated at the same time, the combination of equipment to be stopped becomes enormous and cannot be dealt with. In addition, the power system is not constant, such as changing the system configuration according to various situations. Therefore, if the system state at the time of creating the stored system operation command procedure is different from the system state on the day of operation, it cannot be reused as it is.

For this reason, recently, there has been proposed an operation command procedure and a method of automatically creating it by using the equipment data to be stopped and the system on the day of operation, and particularly, to minimize the range of power outage due to the stop of the equipment to be stopped. There has also been proposed a method of creating an advanced operation command procedure such as the one described above. However, the method
It focuses only on the charging / discharging state of power system equipment,
It is not considered at all whether or not an overload occurs on other equipment when the equipment to be stopped is stopped.Therefore, it is the operator's discretion to calculate the tidal current distribution with the equipment to be stopped stopped and to calculate this. The only way to judge the validity of the created operation command procedure is to compare it with the allowable value of the equipment. And if it turns out that an overload has occurred,
It is necessary to modify the system operation command procedure based on the experience of the operator.

[Object of the Invention] The present invention has been made to solve the above problems, and an object of the present invention is to artificially stop a certain equipment to be stopped. It is possible to create a system operation command procedure for the target equipment to be stopped while eliminating the risk of generating load, and to automatically create a system operation command procedure in the power system that can improve the safety of operation command execution. To provide a method.

[Summary of the Invention] In order to achieve the above object, according to the present invention, in a method of automatically creating a system operation command procedure of stop / recovery operation of equipment that constitutes an electric power system, on the day when the equipment to be stopped is stopped. Create a system on the day of operation, which is the system, and use it as the initial system when creating the system operation command procedure, the equipment to be stopped, the step of creating the procedure that copies the system on the day of operation, the step of disconnecting on the system, and the procedure creation process system Perform the power outage facility determination above, and treat the equipment to be processed as the equipment to be stopped,
A step of classifying into a related power outage facility that is a facility that causes a power outage because the facility to be stopped and a dependent stop facility that is a facility that must be stopped together to stop the facility to be stopped, and related from the classification result Create a step to determine whether there is a power outage facility, and if the result of the determination is that there is a related power outage facility, a procedure to be used together with other sound equipment to recover the power outage of the related power outage facility on the day, and create that procedure Create a procedure to execute a simulated operation on the process system, determine the power outage facility and confirm the recovery of the related power outage facility, and the operation command procedure to stop the facility to be stopped if there is no associated power outage facility as a result of the determination. And the step of reflecting the result on the procedure creation process system, and the step of calculating the power flow distribution using the procedure creation process system in which the operation command procedure for stopping the equipment to be stopped is simulated. And a step of determining whether or not an overload occurs based on the calculated power flow value and the facility allowable value that pass through each facility, and when it is determined that an overload occurs as a result of the determination. In addition, a step for creating an operation command procedure for eliminating the overload and using it again for the calculation of the power flow distribution, and the result of the determination is that when the overload does not occur, the classified dependent stop facility is classified. If there is a dependent stop facility as a result of the determination, the operation command procedure for restoring the power of the dependent stop facility is created, and it is reflected on the procedure creation process system to If there is no dependent stop facility as a result of the determination, the step of determining the presence or absence of a power outage other than the power outage facility, and the result of the determination is that there is a power outage facility that could not be relieved, Blackout facility Create an operation command procedure to restore power and restore power to the power outage facility that could not be repaired, and if there is no power outage facility that could not be repaired as a result of the determination, stop maintenance and inspection of the facility to be stopped Later, a step of creating an operation command procedure for returning the system state to the system on the operation day is provided.

[Embodiment of the Invention] An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a system configuration example of automatic creation of a system operation command procedure in a power system according to the present invention. In the figure, 1 is a power system to be controlled, 2 is an online information input device, 3 is a computer, 4 is a current system state storage unit, 5 is an operation day system creation unit, 6 is a load data storage unit, and 7 is an operation. On the day system storage section,
8 is a procedure creation process system storage unit, 9 is a stop target facility data storage unit, 10 is an operation command procedure creation unit, 11 is a power flow distribution calculation unit, 12 is an equipment allowable value storage unit, 13 is an overload check unit, and 14 is The operation command procedure storage unit 15 is a man-machine device.

That is, the state of the power system is taken into the computer 3 from the power system 1 via the online information input device 2 and stored in the current system state storage unit 4. The operation day system destination creating unit that creates a future system state for performing the operation command procedure refers to both the load data storage unit 6 and the current system state storage unit 4, and is further input from the man-machine device 15. The system on the operation day is created based on the data, and is stored in the system storage unit 7 on the operation day. In addition, the operation command procedure creation unit 10 creates an operation command procedure by referring to the operation day system storage unit 7 and the stop target facility data storage unit 9, and saves the created operation command procedure in the operation command procedure storage unit 14. The result of the simulated execution of the procedure is reflected in the procedure creation process system storage unit 8. Here, when the operation command procedure for stopping the equipment to be stopped is created, the power flow distribution calculation unit 1
1, the power flow distribution is calculated, and using the result and the data of the equipment allowable value storage unit 12, the overload determination unit 13 determines whether an overload occurs. As a result, if it is determined that an overload will occur, the operation command procedure creation unit 10 creates an operation command procedure for eliminating the overload again, and the created procedure is displayed on the man-machine device 15. ing.

FIG. 2 is a flow chart showing a method for automatically creating a system operation command procedure according to the present invention. Note that the method of the present invention is a portion related to the processing steps of S7 to S9 in the same figure, but for convenience of description, other processing steps will also be described.

In the figure, first in step S1, a system on the day when the facility to be stopped (system on the operation day) is created using the current system information and the man-machine device 15, and is used as an initial system when creating the operation command procedure. The operation day system also includes load data created from the load value information stored in the load data storage unit 6.

In step S2, the stop target equipment stored in the stop target equipment data storage unit 9 is separated on the procedure creation process system in which the system is copied on the operation day. As a result, the equipment to be stopped is separated from other equipment in use (charging).

In step S3, a power outage facility determination is performed on this procedure creation process system, and the facility that is the processing target is stopped, and the related power outage facility that is a facility that causes a power outage due to the shutdown of the stop target facility and the stop target facility are stopped. In order to do so, they are also classified as dependent stop equipment, which is equipment that must be stopped together.

In step S4, it is determined from the result of step S3 whether there is a related power outage facility, and if there is a related power outage facility, step S5.
If there is no related power outage facility, the process proceeds to step S6.

In step S5, a procedure to be used in combination with other sound equipment to recover the power outage of the related power outage equipment is created. After this procedure is created, the procedure is simulated on the procedure creation process system, and the power outage facility is judged to confirm the recovery of the related power outage facility.

In step S6, an operation command procedure for stopping the facility to be stopped is created and reflected on the procedure creation process system.

Next, steps S7 to S9 are steps related to the method of the present invention. That is, in step S7 in the figure, the power flow distribution calculation unit 11 obtains the power flow distribution using the procedure creation process system in which the operation command procedure for stopping the stop target equipment is simulated.

In step S8, whether the overload is generated by the overload determination unit 13 using the power flow value passing through each facility obtained in step S7 and the facility tolerance value stored in the facility tolerance value storage unit 12 To determine. If it is determined that an overload occurs as a result of this determination, step S9
If it is determined that no overload occurs, the process proceeds to step S10.

In step S9, an operation command procedure for eliminating the overload is created and inserted before the operation command procedure created in step S6. An example of a method of creating an operation command procedure for eliminating this overload is shown in FIG. In FIG.
Equipment that is determined to overload is classified into transformers and transmission lines, and an operation command is provided to average the power flow distribution in order to eliminate overload while maintaining the original system configuration as much as possible for each. Create a procedure. The details will be described later. When the overload elimination procedure is created, the process returns to step S7 again, and steps S7 to S9 are repeated until the overload is eliminated.

Next, in step S10, the presence / absence of the dependent stop facility classified in step S3 is determined. If the dependent stop facility is present, the process proceeds to step S11. If the dependent stop facility is not present, the process proceeds to step S12.

In step S11, an operation command procedure for restoring power to the dependent stop facility is created, and the procedure of the procedure creation process is reflected on the system to determine the power outage facility.

In step S12, it is determined whether or not there is a power outage other than the stopped equipment.

In step S13, as a point at which power can be supplied to the power outage facility that could not be repaired, a power-on switch that is on the boundary between the power outage facility and another facility and has one end being charged is extracted. Then, by closing the extracted power supply operation switch, the power failure equipment that could not be rescued is restored. With the above, the system operation procedure of the stop operation for the stop target equipment is completed.

Next, in step S14, an operation command procedure for returning the system state to the system on the operation day is created after the maintenance and inspection of the facility to be stopped is completed. This is created in the reverse order of the operation command procedure of the stop operation.

Next, the details of the method of creating the overload elimination procedure according to the present invention will be described with reference to FIG. First, in step M1, it is determined whether the equipment determined to be overloaded is a transformer or a transmission line, and if it is a transformer, the process proceeds to step M2 to create an operation command procedure for eliminating the overload of the transformer. Start and
In the case of a power transmission line, the process proceeds to step M7 to start creating an operation command procedure for eliminating the overload of the power transmission line.

That is, first, in order to eliminate the overload of the transformer, in step M2, it is determined whether or not the bus ties of the primary side bus and the secondary side bus of the electric station including the overloaded transformer can be turned on, If possible, the process proceeds to step M3 to create an operation command procedure for inserting a bus tie. In addition, if the bus tie cannot be turned on due to the bus tie being stopped, or if the bus tie has already been turned on, it is possible to switch the busbar side disconnectors of transformers other than the overload transformer in step M4. It is determined whether or not the switching operation is possible, and in step M5, an A / B switching operation command procedure for the busbar side disconnector of the transformer is created. If the busbar-side disconnector cannot be switched, an operation command procedure for disconnecting the power transmission line connected to the secondary-side busbar is created in step M6. Then, the separated transmission line is step S in FIG.
By 12 to S13, an operation command procedure for restoring power by turning on the power supply candidate switch is created.

On the other hand, in order to eliminate the overload of the transmission line, it is first determined whether the overload of the transmission line depends only on the internal load of the transmission line. As a result, in the case of an overload that depends only on the internal load, it is necessary to limit the internal load, and the overload of the transmission line cannot be eliminated by reassembling the system. Create an operation command procedure.
If the internal load is not overloaded, step M
At 9, it is determined whether or not it is possible to put a bustie at the load end electric station of the overload transmission line, and if it is possible, the process proceeds to step M10 to create a bustie throwing operation command procedure. If it is impossible to insert the bus tie, step M1
It is determined by 1 whether or not the power station at the load end can receive power from another power source, and if it can receive power, the power receiving via the overload power transmission line is stopped in step M12, and a power receiving operation command from another power source is issued. Create a procedure. If power cannot be received from another power source, the process proceeds to step M8 to switch the overload power transmission line and create an operation command procedure.

Next, a specific method of creating the system operation command procedure according to the present invention described above will be described by taking the case of the power system of FIG. 4 as an example. In FIG. 4, the bus BUS from the power source G1
1, BUS2, BUS3, BUS4, BUS5, BUS
6, power is supplied to the power transmission lines L1 to L7, the transformers T1, T2 and T3, and the power source G2 to the bus BUS9 and the power transmission line L8. Here, the transformer T in FIG.
The operation command procedure method of FIGS. 2 and 3 will be described by taking as an example a case where a stop / recovery operation is performed with 1, T2 as the stop target equipment.

First, in step S1, the operator creates an operation-day system for stopping the facility to be stopped using the current system information and the man-machine device 15. At this point, the load value on the operation day is automatically created based on the load value record data, and the power flow distribution is calculated.

In step S2, in order to disconnect the transformers T1 and T2 of the equipment to be stopped in a simulated manner in the procedure creation process system, the switches associated with the equipment to be stopped are considered in the switch type in the basic configuration data of the power system. And open. A related switch is a representative breaker (CB) or disconnector (L) of the switch group connected to the facility to be stopped, which has priority on the breaker.
S). However, in the case of a non-voltage operated disconnector, the above-mentioned processing is performed by further considering the equipment connected to the equipment to be stopped through the switch as the equipment to be stopped. In FIG. 4, since the disconnecting switches LS7 and LS8 are non-voltage operated switches, the switch to be opened when disconnecting the transformer T1 is C.
The switches that are opened when B1, CB4, CB20, LS7 and the transformer T2 are disconnected are CB2, CB5 and LS8.

In step S3, the power outage facility is determined in the system state created in step S2. As a result, the transformers T1, T
2 is a stop facility, and power transmission lines L1, L2, L4 are subordinate stop facilities. Bus lines BUS1, BUS2, BUS5, BUS6 and power transmission lines L5, L6 are associated power failure facilities. Therefore, in step S5, an operation command procedure for avoiding a power outage of the associated power outage facility is created. In this case, an operation command procedure for closing the circuit breaker CB9 is created, and the result is reflected on the procedure creation process system.

Next, in step S6, an operation command procedure for stopping the transformers T1 and T2 that are the stop target facilities is created.
At this time, since the switch opened at the time of disconnecting the equipment to be stopped from the system on the operation day in step S2 is targeted, CB
1, CB2, CB4, CB5, CB20, LS7, LS
The operation command procedure for each of the eight switches is created and reflected on the procedure creation process system.

On the other hand, in step S7, the power flow distribution is calculated. That is, the tidal currents passing through the transformers T1, T2 and T3 before the transformers T1 and T2 of the facility to be stopped are stopped by P
1, P2, P3 means that the transformers T1, T2 are stopped, so that the total power flow value P1 + P2 + P3 is concentrated on the transformer T3.

Next, in step S8, in order to determine overload,
The allowable value of each facility stored in the facility allowable value storage unit 12 is compared with the power flow value calculated in step S7. As a result, it is assumed that the power flow passing through the transformer T3 is now larger than the facility allowable value, and it is determined that an overload occurs in the transformer T3.

In step S9, an operation command procedure for eliminating the overload of the transformer T3 is created according to FIG. That is, in FIG. 3, since the overload facility is a transformer, it is first determined whether or not the bus tie can be put in the same electric station. In this case, since the bus tie has already been turned on, the possibility of switching the bus-side disconnector of another transformer is determined next. In this case, since all the other transformers are stop facilities, a disconnection operation command procedure for the transmission line connected to the secondary side bus is created next. Now assume that the power transmission line L5 has been disconnected, and step S7 is performed again.
Return to and calculate the tidal current distribution. As a result, assume that the overload has disappeared. In this case, since there are transmission lines L1, L2, L4 as dependent stop facilities, CB is determined in step S11.
An operation command procedure for closing the switches CB1 and CB2 is created.

Next, in step S12, it is determined whether there is a dependent stop facility or a related power outage facility that could not recover from the power outage in the process of step S5 or step S11 by determining the power outage facility on the procedure creation process system.

At this point, buses BUS5 and BUS6, transmission line L
5 remains as a power outage facility. Therefore, step S1
3, the circuit breaker CB20 is closed to restore the C (special) bus bar BUS5, and the circuit breaker CB13 is opened to C
An operation command procedure for closing the B14 to restore the D (special) bus BUS6 is created. As described above, the operation command procedure of the stop operation for the stop target equipment is completed.

Finally, in step S14, a recovery operation command procedure is created so as to be in the reverse order of the stop operation.

Note that the above is an example of the case where the transformer is determined to be an equipment that causes an overload, but there is a possibility that an overload will occur even in a transmission line. In this case, as shown in FIG. 3, first, it is determined whether or not there is an overload due to the load inside the power transmission line. As a result, if the load is overloaded, it is impossible to supply power to the transmission line from the current transmission end, so a disconnection operation command procedure for the transmission line is created. If it is an overload due to the load inside the power transmission line, it is first determined whether or not the bus tie can be turned on at the load end electrical station, and if possible, a bus tie turn-on operation command procedure is created. If it is not possible, then it is determined whether or not the load end electric power station can be received by another power source, and if it is possible, an operation command procedure for receiving power from the other power source is created. If it is not possible, a disconnection operation command procedure for the power transmission line is created.

As described above, in the method for automatically creating the system operation command procedure in the power system according to the present invention, by executing the created stop operation, there is no risk of overloading other power system equipment. The safety of command execution will be improved. Also, when trying to artificially stop a plurality of equipment to be stopped, it was extremely difficult to take measures to prevent overload by the conventional operator's judgment.
By using this method, a reliable operation command procedure can be created. In addition, when creating a system operation command procedure, the system classifies and classifies power outage facilities (classifies the equipment to be stopped, related power outage equipment, and dependent outage equipment). The operation command procedure can be automatically created.

[Effects of the Invention] As described above, according to the present invention, when artificially attempting to stop a certain facility to be stopped, there is a need to eliminate the risk of overloading other facilities with the purpose. A method for automatically creating a system operation command procedure in a power system that can create a more detailed and safer system operation command procedure for the equipment to be stopped, and that can improve the safety of operation command execution. Can be provided.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is an overall flow chart for explaining the method of the present invention, and FIG. 3 shows a method of creating an overload elimination procedure according to the present invention. FIG. 4 is a configuration diagram showing an example of a power system for specifically explaining the method of the present invention. DESCRIPTION OF SYMBOLS 1 ... Electric power system, 2 ... Online information input device, 4 ... Current system state storage part, 5 ... Operation day system creation part, 6 ... Load data storage part, 7 ... Operation day system storage part, 8 ... Procedure creation process system storage Section, 9 ... Stop target equipment data storage section, 10 ...
Operation command procedure creation unit, 11 ... Power flow distribution calculation unit, 12 ... Facility allowable value storage unit, 13 ... Overload determination unit, 14 ... Operation command procedure storage unit, 15 ... Man-machine device.

Claims (2)

[Claims] Claim: What is claimed is: 1. A method for automatically creating a system operation command procedure for stopping / restoring operation of equipment that constitutes an electric power system, in which an operation day system, which is a system on the day when the facility to be stopped is stopped, is created and system operation is performed. The step of making the initial system at the time of creating the command procedure, the step of disconnecting the equipment to be stopped on the procedure creating process system that copied the system on the operation day, and performing the power outage facility determination on the procedure creating process system, and processing The target equipment is the equipment to be stopped, the related power outage equipment that is a power outage due to the stop of the equipment to be stopped, and the dependent stop that is the equipment that must be stopped together to stop the equipment to be stopped. A step of classifying into equipment, a step of determining the presence or absence of a related power outage facility from the classification result, and a result of the determination, if there is a related power outage facility, the relevant Create a procedure to be used together with other sound equipment to recover from a power outage of electrical equipment, execute the procedure in a simulated manner on the procedure creation process system, judge the power outage equipment, and restore the related power outage equipment. As a result of the determination, if there is no associated power outage facility, a step of creating an operation command procedure for stopping the facility to be stopped and reflecting it on the procedure creation process system, and stopping the facility to be stopped A step of calculating a power flow distribution using the procedure creation process system in which the operation command procedure is simulated, and an overload based on the calculated power flow value passing through each facility and the facility allowable value. And a step of determining whether or not occurs, the result of the determination, if it is determined that an overload occurs, create an operation command procedure for eliminating the overload, the calculation of the power flow distribution Step to be used again, as a result of the determination, when it is determined that no overload occurs, a step of determining the presence or absence of the classified dependent stop equipment, the result of the determination, if there is a dependent stop equipment, In addition to creating an operation command procedure for restoring the power to the dependent stop facility, the step of determining the power outage facility by reflecting it on the procedure creation process system, and the result of the determination, when there is no dependent stop facility, The step of determining the presence or absence of power outage equipment other than the power outage equipment, and if there is a power outage equipment that could not be rescued as a result of the above determination, create an operation command procedure for restoring the power outage equipment The step of restoring the power failure equipment that could not be performed, and, as a result of the determination, if there is no power failure equipment that could not be repaired, after the maintenance and inspection of the equipment to be stopped, the system state is operated as described above. A method of automatically creating a system operation command procedure in a power system, comprising: a step of creating an operation command procedure for returning to the current day system. 2. An operation command procedure for eliminating the overload,
The electric power according to claim (1), which is an operation such as switching of a transformer or a bus-side disconnector of a power transmission line, turning on a bus tie, disconnecting a power transmission line, receiving power from another power source, or the like. A method for automatically creating a system operation command procedure in a system.