JP2693440B2 - System restoration system at the time of accident - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention outputs effective and flexible outage load recovery plan data in response to a system situation in the event of a system failure and performs a recovery operation. The present invention relates to an automatic accident system restoration system. (Prior Art) Once a power outage accident occurs as the power system becomes more complex and larger, the operation for restoring it becomes complicated,
It will take a long time to recover. Currently, automation of power outage load recovery operation is being considered for system accidents. As the first step, a power outage load recovery plan (procedure) is automatically created and presented to the operator, and the recovery operation is performed based on this. Is being put to practical use. In this case, the operator issues a command to each substation and control station for the presented recovery plan, waits for each operation completion report, and then issues the next command based on the recovery plan. However, in such a system restoration system, for example, in the restoration process, the equipment that was considered unusable at the time of establishing the restoration plan can be used, or conversely, the equipment that was thought to be available when the restoration plan was created cannot be used. When it becomes clear, the recovery plan must be modified in consideration of this information. In addition, if it takes more time than expected at the time of formulating a recovery plan to complete one facility operation, the next command cannot be issued immediately, resulting in a significant delay in recovery. A concrete example is a case where the power source of a thermal power plant is disconnected from the grid and a power failure occurs, and then the power is paralleled to the grid again. In addition, even if the magnitude of the load is significantly different from the value assumed when the recovery plan was formulated, the recovery plan must be modified in consideration of this situation. Therefore, these corrections and the like eventually become the work of the operator, and when carrying out a great deal of work such as at the time of restoration, it is not possible to make an accurate judgment in a short time, making quick restoration difficult. (Problems to be solved by the invention) As described above, in the conventional system restoration system at the time of an accident, when the system situation changes during the power outage load restoration process, the operator has to make corrections each time, so safe and quick restoration is possible. There was a problem that could not be done. Therefore, it is an object of the present invention to provide an efficient and flexible system recovery system at the time of an accident by outputting data in which a recovery plan is updated based on system information in a power outage load recovery process. [Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention is to open / close information of relays, circuit breakers, and disconnecting switches that are sequentially taken in from a power system, and voltage and phase of each part in the system. , Input means for taking in input data such as frequency, active power, reactive power information, etc., first storage means for storing the input data taken in by this input means, an accident signal or a recovery plan formulation When a start signal is input, the input data stored in the first storage means is used as an initial state of the system to create a recovery plan by a calculation, and a recovery plan creation means is created. Second storage means for storing the plan data, output means for outputting the restoration plan data stored in the second storage means, and the first storage means by the predetermined timing signal. The actual system state based on the input data corresponding to the system state in the process of recovery being remembered is compared with the system state assumed at the time of creating the recovery procedure, and when the difference is larger than a certain value, it is stored in the second storage means. And a recovery plan updating means for updating the recovery plan data stored therein. (Operation) Therefore, in the system recovery system at the time of an accident having such a configuration, with the input data from the power system taken in by the input means being stored in the first storage means, an accident signal or recovery When a start signal for planning is input to the recovery plan creating means, the input data stored in the first storage means is fetched as an initial state of system recovery and a recovery plan is created by calculation. Then, when a start signal is added to the recovery plan updating means at a predetermined timing in the power failure load recovery process, the actual system status and the recovery based on the input data stored in the first storage means according to the system status in the process of recovery. Since the restoration plan data stored in the second storage means is updated when the system state assumed at the time of creating the procedure is compared and the difference is larger than a certain value, it is unexpected during the system restoration process. Even if conditions are imposed, as a result, it is possible to quickly, safely and reliably restore the power failure load. Embodiment An embodiment of the present invention will be described below with reference to the drawings. Fig. 1 shows an accident in which the recovery plan is updated and the power failure load is restored by the output data when the difference between the assumed system restoration status based on the power failure load restoration plan and the actual system status exceeds a certain threshold 1 shows an example of the configuration of a time system restoration system. In FIG. 1, 1 is a power system, 2
Is an input device that takes in input data such as relay / breaker / disconnector switching information from the power system 1 at a fixed sampling period and voltage / phase / frequency / active power / reactive power information of each part of the system. Reference numeral 3 is a first storage device for storing the input data taken in by the input device 2, and 4 is the input data stored in the first storage device 3 when the accident signal 32 is input. This is a recovery plan calculation device that creates a recovery plan by taking calculation as a state. As a means for creating a recovery plan in the recovery plan calculation device 4, any method such as a method using simulation, a method using mathematical planning, or a method applying knowledge engineering may be used.
Here, as an example, the Institute of Electrical Engineers of Japan, Vol.93-B, No.8, P32
3 ~ P330 simulates the actual operation performed in the actual system by digital simulation,
A method based on making trial and error decisions is adopted. In this case, when the recovery plan is created, the expected recovery status of the system, such as how the system will be recovered according to each recovery procedure, is also determined at the same time. Further, 5 is a second storage device for storing the data of the recovery plan created by the recovery plan calculation device 4 and the assumed recovery status of the system based on the plan, and 6 is stored in the first storage device 3. An arithmetic unit for comparing and calculating the input data and the assumed restoration status of the system based on the restoration plan stored in the second storage device 5. If the difference in the system conditions exceeds a certain threshold value, a start signal 31 is added to the recovery plan arithmetic unit 4
The recovery plan is updated based on the input data stored in the storage means according to the system status during the recovery. Further, 7 is an output device for outputting the recovery plan data stored in the second storage device 5, and 8 is a display device for displaying the recovery data output from the output device 7. In the above, the first storage device 3, the recovery plan calculation device 4,
The second storage device 5 and the arithmetic device 6 are composed of an electronic computer 10. Next, the operation of the system restoration system at the time of an accident configured as described above will be described. Now, it is assumed that input data is sequentially fetched from the power system 1 via the input device 2 at a constant sampling cycle and stored in the first storage device 3. When an accident signal or a start signal 31 for formulating a recovery plan is added to the recovery plan calculation device 4 in such a state, the latest recovery plan calculation device 4 stores the latest signal stored in the first storage device 3. A recovery plan is created with the input data as the initial state of the system. When creating this restoration plan, the assumed restoration status of the system, which is how the system will be restored according to each restoration procedure, is also determined at the same time. It is stored in the second storage device 5. At the same time, the recovery plan data is output to the display device 8 via the output device 7. Then, for example, the operator proceeds with the restoration operation based on this output, or proceeds with the restoration operation automatically. On the other hand, in the process of performing the recovery operation in this manner, the arithmetic unit 6 stores the input data from the power system 1 stored in the first storage unit 3 at that time and the second storage unit 5 in the input data. Compared with the expected restoration status of the system based on the established restoration plan, if the difference between the assumed restoration status of the system based on the restoration plan and the actual restoration status is greater than the threshold value, the restoration plan calculation device 4 Add the activation signal 31. Therefore, when the activation signal 31 is applied to the recovery plan calculation device 4, a recovery plan is created based on the input data stored in the first storage device 3 at this time, and the data is used as the update data for the second data. Rewrite the storage means 5. Here, as a measure for evaluating the difference between the assumed system status and the actual system status, for example, (1) the assumed restoration degree of a specific load based on the restoration plan and the actual restoration degree are compared ( 2) Compare the assumed degree of restoration of all loads based on the restoration plan and the actual degree of restoration. (3) Compare the parallel predicted time to the grid of the stopped power plant based on the restoration plan and the actual parallel predicted time. It is possible to do it. If there is no difference between the expected system restoration status based on the restoration plan and the actual system situation, or if there is a difference, the restoration is proceeding according to the restoration plan, so the restoration plan is updated. Instead, you can continue the operation. As described above, in this embodiment, there is a difference between the assumed system restoration state and the actual system state in the process of restoring the power failure load based on the restoration plan created by the restoration plan calculation device 4. If it is larger than the value, the input data from the power system at that time and the assumed recovery status of the system are compared and calculated, the recovery plan is updated, and the output data is used to perform the recovery operation of the power failure load. , The system can be restored with flexibility. Next, another embodiment of the present invention will be described. In the above embodiment, the arithmetic unit 6 compares and calculates the assumed system restoration situation and the actual system situation, and when the difference becomes larger than the threshold value, the recovery plan arithmetic unit 4 is added with the start signal 31 to make the restoration plan. 2, the timer 11 is provided in place of the arithmetic unit 6 as shown in FIG. 2, and the recovery plan is updated by giving a start signal from the timer 11 to the recovery plan arithmetic unit 4 at a constant cycle. You may Alternatively, as shown in FIG. 3, a start signal 31 from an operator may be input to the recovery plan calculation device 4 via the input device 12 without using the calculation device 6 to update the recovery plan. As described above, it is apparent that the same effects as those of the above-described embodiment can be obtained even with the configurations shown in FIGS. 2 and 3. [Effects of the Invention] As described above, according to the present invention, the switching information of relays, circuit breakers, and disconnectors that are sequentially taken in from the power system, and the voltage, phase, frequency, active power, and reactive power of each part in the system. Input means for inputting input data such as information, first storage means for storing the input data taken in by this input means, and a first signal for inputting an accident signal or a start signal for establishing a recovery plan A recovery plan creating means for creating a recovery plan by taking in the input data stored in the first storage means as the initial state of the system, and a second storage for storing the recovery plan data created by the recovery plan creating means. Means, an output means for outputting the restoration plan data stored in the second storage means, and a system status in the middle of restoration stored in the first storage means by a predetermined timing signal. Data including a restoration total restoration plan updating means for inputting corresponding input data to the restoration plan creating means to update the restoration plan, and updating the restoration plan according to the system condition in the power outage load restoration process at a predetermined timing. Since the recovery work is output by outputting, a system recovery system at the time of an accident can be dealt with efficiently and flexibly even if an event that was not considered when creating the recovery plan occurs in the recovery process. Can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block configuration diagram showing an embodiment of a system restoration system at the time of an accident according to the present invention, and FIGS. 2 and 3 are block configuration diagrams showing other embodiments of the present invention, respectively. Is. 1 ... Power system, 2 ... Input device, 3 ... First storage device, 4 ... Recovery plan calculation device, 5 ... Second storage device,
6 ... Computing device, 7 ... Output device, 8 ... Display device, 10
…… Computer, 11 …… Timer, 12 …… Input device.

   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor Masakazu Kato               No. 1 Toshiba Town, Fuchu City, Tokyo Higashi Co., Ltd.               Inside the Shiba Fuchu factory                (56) Reference JP-A-58-151830 (JP, A)                 JP-A-59-106824 (JP, A)                 JP-A-59-70148 (JP, A)                 JP 57-71229 (JP, A)

Claims (1)

(57) [Claims] With input means that takes in input / output information such as switching information of relays, circuit breakers, and disconnecting switches that are sequentially taken from the power system, and voltage, phase, frequency, active power, and reactive power information of each part in the power grid, and this input means. A first storage means for storing the input data taken in and an input signal stored in the first storage means for inputting an accident signal or a start signal for formulating a recovery plan to the initial state of the system. As a recovery plan creating means for creating a recovery plan by capturing calculation,
Second storage means for storing the restoration plan data created by the restoration plan creation means, output means for outputting the restoration plan data stored in the second storage means, and the first timing signal based on the predetermined timing signal. When the difference between the actual system state based on the input data according to the system state during the restoration stored in the storage means and the system state assumed at the time of creating the restoration procedure is larger than a certain value, the second system A system recovery system at the time of an accident, comprising: a recovery plan updating means for updating the recovery plan data stored in the storage means. 2. The system restoration system at the time of an accident according to claim 1, wherein the predetermined timing signal is a start signal from an operator. 3. The system restoration system at the time of an accident according to claim 1, wherein the predetermined timing signal is generated by a timer at regular intervals.