JP2010183759A - System stabilizer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pre-operation type system stabilizer for suppressing the manufacturing cost and reducing preparation work of input data. <P>SOLUTION: The system stabilizer stabilizes a power system 40. The system stabilizer periodically creates flow-to-control amount data DT indicating the correlation between a necessary control amount required for stabilizing the operation of a group of generators 41 when an estimated fault occurs in a power transmission line 42 and a flow on the power transmission line 42, based on power system information periodically obtained from the power system 40, settles a calculated correlation graph coefficient KZ as a settled value based on the flow-to-control amount data DT accumulated, and exerts control to stabilize the operation of the group of generators 41 based on the settled correlation graph coefficient KA when a fault is detected. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a system stabilizing device that stabilizes a power system.

  Generally, when a grid fault occurs in the power system, the balance between the mechanical input and the electrical output of the generator is lost. For this reason, a generator cannot maintain synchronous operation and may be in an unstable operation state. This state is called a step-out phenomenon. If this state of step-out phenomenon is left unattended, it will cause a chain stop of the generators of the entire system, which may spread to a wide-area power outage.

  In order to prevent such a situation at the time of a grid fault, a grid stabilization device has been introduced. System stabilization devices are roughly classified into three types: an offline pre-computation type, an online pre-computation type, and a post-operation type (see, for example, Non-Patent Document 1).

  The pre-calculation type calculates a control amount assuming a phenomenon before an accident occurs, and performs control when an accident is detected. The pre-operation type can be further classified into an offline method and an online method according to the difference in data used for the operation. The off-line pre-computation type is a method that uses the system state assumed from the planned system / tidal current as computation data. The online pre-calculation type is a method in which online data such as the actual power flow situation and circuit breaker on / off information is used for calculation.

  The post-calculation type measures the voltage and current values during and after an accident and predicts the subsequent phenomena to perform computation and control. The post-operation type is limited to the online method because of its characteristics.

"System out-of-step and accident prevention relay technology", IEEJ Technical Report, The Institute of Electrical Engineers of Japan, October 2000, No.801, p5-174

  However, the system stabilizing devices as described above have the following problems.

  The offline pre-computation type requires a huge amount of prior simulation. In addition, for this simulation and the like, work such as preparing input data to the arithmetic device in advance becomes enormous.

  The online pre-calculation type needs to always calculate and prepare control amount data in the current state of the power system. In addition, the system stabilization device is required to have a time from when the system changes due to an accident to when the control signal reaches the generator to about several hundred milliseconds or less. In order to satisfy such a requirement, a high-performance computer or the like is required, which entails enormous costs for the apparatus.

  Since the post-operation type performs system stabilization calculation after the occurrence of an accident, the control time is delayed compared to the pre-operation type.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a pre-calculation type system stabilization apparatus that can suppress manufacturing costs and reduce input data preparation work.

  A system stabilization apparatus according to an aspect of the present invention is a system stabilization apparatus that performs system stabilization of a power system that transmits power output from a generator through a power transmission line, and is information related to the power system. Necessary for stabilizing the operation of the generator at the time of an assumed accident of the power transmission line based on the power system information acquisition means for acquiring power system information and the power system information acquired by the power system information acquisition means A tidal current pair control amount data creating means for periodically creating tidal current pair control amount data, which is data indicating a correlation between a necessary necessary control amount and a tidal current flowing in the power transmission line, and the tidal current pair control amount data creating means. Based on the tidal current pair control amount data storage means for storing the generated tidal current pair control amount data, and the tidal current pair control amount data stored in the tidal current pair control amount data storage means. Coefficient calculation means for calculating a coefficient of a graph indicating the correlation between the necessary control amount and the power flow, and the coefficient calculated by the coefficient calculation means stabilizes the operation of the generator in the event of an accident in the power system. A settling means for setting as a settling value for creating a control signal for performing control, a system fault detection means for detecting an accident in the power system, and when the fault is detected by the system fault detection means, the settling Control signal creating means for creating the control signal based on the set value set by the means, and control for stabilizing the operation of the generator based on the control signal created by the control signal creating means. And stabilization control means.

  ADVANTAGE OF THE INVENTION According to this invention, the manufacturing cost can be suppressed and the pre-calculation type | system | group stabilization apparatus which can reduce the preparation work of input data can be provided.

The block diagram which shows the structure of the system | strain stabilization apparatus which concerns on the 1st Embodiment of this invention. The graph for demonstrating the calculation method of the correlation graph for calculating | requiring the correlation graph coefficient KZ of the correlation graph coefficient preparation part which concerns on 1st Embodiment. The graph which shows the control area | region used for control of the calculating part for control which concerns on 1st Embodiment. The block diagram which shows the structure of the system | strain stabilization apparatus which concerns on the 2nd Embodiment of this invention. The block diagram which shows the structure of the system | strain stabilization apparatus which concerns on the 3rd Embodiment of this invention.

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

(First embodiment)
FIG. 1 is a block diagram showing the configuration of the system stabilizing device 1 according to the first embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the same part in subsequent figures, the detailed description is abbreviate | omitted, and a different part is mainly described. In the following embodiments, the same description is omitted.

  The system stabilizing device 1 is a device for stabilizing the system of the power system 40.

  The power system 40 includes a generator group 41, a power transmission line 42, and a main system 43.

  The generator group 41 has a configuration including four generators G1, G2, G3, and G4. Here, although the number of generators G1 to G4 is four, it may be one or any number of two or more. Moreover, the generators G1-G4 are operated synchronously. The generator group 41 supplies AC power to the main system 43 via the power transmission line 42.

  The power transmission line 42 includes four transmission lines LA1, LA2, LB1, and LB2. Here, the number of transmission lines LA1 to LB2 is four, but may be one or any number of two or more. These power transmission lines LA <b> 1 to LB <b> 2 connect the generator group 41 and the main system 43.

  The main system 43 is supplied with electric power from the generator group 41.

  The system stabilizing device 1 includes a pre-calculation unit 10 and a stabilization control unit 20.

  The pre-calculation unit 10 includes a power system information acquisition unit 11, a pre-calculation processing unit 12, a tidal current control amount data storage unit 13, a correlation graph coefficient creation unit 14, a correlation graph coefficient storage unit 15, and an input / output unit. 16 and an input / output indicator 17.

  The power system information acquisition unit 11 periodically acquires power system information indicating the current state of the power system 40. Here, the power system information is information regarding the state of the circuit breaker, disconnector, generator, load, phase adjusting equipment, transformer tap, and the like. In other words, the power system information includes information necessary for calculation of an assumed accident of the power transmission line 42 in the power system 40. The power system information acquisition unit 11 periodically outputs the acquired power system information to the pre-processing unit 12. Periodic is an interval such as seconds, minutes or hours. Moreover, you may determine according to the performance of apparatuses, such as a communication apparatus used as the system | strain stabilization apparatus 1, and a computer.

  The pre-processing unit 12 creates tidal current control amount data DT based on the power system information input from the power system information acquisition unit 11.

  Next, a method for creating the tidal pair control amount data DT will be described.

  The pre-processing unit 12 uses the power system information input from the power system information acquisition unit 11 and assumes the state of the main system 43 and the accident aspect of the power transmission line 42 when the power transmission line 42 fails. To do.

  The pre-processing unit 12 performs a simulation operation using transient stability calculation for the assumed failure of the power transmission line 42.

  In this simulation, the pre-processing unit 12 determines whether or not the generators G1 to G4 can be stably operated when the power transmission line 42 is in an accident.

  When it is determined that the operation of the generators G1 to G4 becomes unstable as a result of the determination, the pre-calculation processing unit 12 calculates the necessary control amount of power generation of the generators G1 to G4 necessary to eliminate this instability. To do.

  Based on the calculation result, the preliminary calculation processing unit 12 creates the power flow control amount data DT in which the power flow of the power transmission line 42 before the accident is paired with the necessary control amount. This is because the necessary control amount generally depends on the value of the power flow of the power transmission line 42 before the accident.

  The pre-processing unit 12 stores the created tidal current pair control amount data DT in the tidal current pair control amount data storage unit 13.

  The pre-processing unit 12 periodically repeats the above-described process, and accumulates the tidal pair control amount data DT in the tidal pair control amount data storage unit 13. As described above, the tidal current pair control amount data storage unit 13 accumulates various tidal current pair control amount data DT by repeating the calculation processing periodically. For example, the accumulated tidal current control amount data DT includes the daytime heavy load system state, nighttime light load system state, Sunday system state, weekday system state, or system equipment in this system. This is the status of the system that is stopped for maintenance.

  The tidal current control amount data storage unit 13 is a storage medium such as a memory or a hard disk, for example.

  The correlation graph coefficient creating unit 14 calculates a correlation graph coefficient KZ based on the tidal current pair control amount data DT stored in the tidal current pair control amount data storage unit 13 in the period from the past to the present. Here, the period from the past to the present is, for example, half a year or one year.

  Next, a method for calculating the correlation graph coefficient KZ will be described with reference to FIG.

  FIG. 2 is a graph for explaining a calculation method of the correlation graph F1 for obtaining the correlation graph coefficient KZ of the correlation graph coefficient creation unit 14 according to the present embodiment. The horizontal axis represents the pre-accident power transmission line tidal current PG. The vertical axis represents the required control amount P.

  The correlation graph coefficient creation unit 14 obtains a correlation graph F1. The correlation graph F1 is represented by P = a × PG + b. Coefficient a and coefficient b in this equation are correlation graph coefficients.

  The correlation graph coefficient creating unit 14 obtains a graph F0 such that the required control amount P is larger than any of the tidal current pair control amount data DT for a predetermined period before obtaining the correlation graph F1.

  The correlation graph coefficient creating unit 14 obtains a correlation graph F1 that is larger than the graph F0 by a preset threshold TH. The coefficients a and b created when obtaining the correlation graph F1 are set as the correlation graph coefficient KZ.

  The correlation graph coefficient creation unit 14 stores the created correlation graph coefficient KZ in the correlation graph coefficient storage unit 15.

  The correlation graph coefficient storage unit 15 is a storage medium such as a memory or a hard disk.

  The input / output unit 16 receives the correlation graph coefficient KZ stored in the correlation graph coefficient storage unit 15 and the correlation graph coefficient set as a set value in the set value storage unit 22 in response to a request from the input / output display unit 17. Compare with KA. When the input / output unit 16 receives a setting instruction from the input / output display 17, the input / output unit 16 sets the correlation graph coefficient KZ stored in the correlation graph coefficient storage unit 15 as a new set value in the set value storage unit 22.

  The stabilization control unit 20 includes a settling unit 21, a set value storage unit 22, a generator / power transmission line information acquisition unit 23, an accident detection unit 24, a control calculation unit 25, and a control unit 26. ing.

  The settling unit 21 is provided for setting the correlation graph coefficient KA, which is a set value, in the set value storage unit 22 based on the set data DP input by manual input.

  The generator / power transmission line information acquisition unit 23 acquires generator / power transmission line information including information on the generator group 41 of the power system 40 and information on the power transmission line 42. The information on the generator group 41 includes a generator output value and the like. The information on the power transmission line 42 includes a power flow value flowing in the power transmission line 42, protection relay operation status data and circuit breaker data installed in the power transmission line 42, and the like. The generator / power transmission line information acquisition unit 23 outputs the acquired generator / power transmission line information to the accident detection unit 24.

  The accident detection unit 24 records and holds the generator / power transmission line information every time. Thereby, the accident detection part 24 can read the generator and power transmission line information recorded and held last time. The accident detection unit 24 generates an accident based on the previously input generator / power transmission line information and the protection relay operation status data and circuit breaker data included in the currently input generator / power transmission line information. The presence or absence of is detected.

  If no accident is detected, the accident detection unit 24 waits for input until the next time generator / power transmission line information is input. The accident detection unit 24 activates the control calculation unit 25 when an accident is detected. At this time, the accident detection unit 24 outputs the power transmission line power flow before the accident and the generator information to the control calculation unit 25. Here, the power transmission line tide value input last time is used as the power transmission line tide before the accident.

  When activated, the control calculation unit 25 reads the correlation graph coefficient KA set in the set value storage unit 22. The control calculation unit 25 obtains a necessary control amount from the correlation graph coefficient KA read from the set value storage unit 22 and the pre-accident power transmission line flow and generator information input from the accident detection unit 24. The control calculation unit 25 generates a control signal based on the necessary control amount. The control calculation unit 25 outputs the generated control signal to the control unit 26.

  Next, with reference to FIG. 3, a method for generating a control signal of the control calculation unit 25 will be described.

  FIG. 3 is a graph showing the control region Sc used for control of the control calculation unit 25 according to the present embodiment. The horizontal axis represents the pre-accident power transmission line tidal current PG. The vertical axis represents the required control amount P.

  The control calculation unit 25 first calculates the necessary control amount P.

  When the pre-accident power line power flow PG is below a certain threshold, the required control amount P is zero.

  When the pre-accident power line power flow PG is equal to or greater than a certain threshold, the necessary control amount P is calculated by the necessary control amount P = a × PG + b (correlation graph F1) using the coefficients a and b of the correlation graph coefficient KA. Thereby, the control region Sc of the generator group 41 is obtained.

  The control calculation unit 25 selects the generators G1 to G4 to be controlled from the generator information of the generator group 41 so as to belong to the control region Sc in which the total output value is equal to or greater than the necessary control amount P. Depending on the value of the required control amount P, there may be one generator or a plurality of generators to be controlled.

  The control calculation unit 25 creates a control signal based on the total values of the generators G1 to G4 to be controlled and the output determined by the above processing.

  The control unit 26 controls the generator 41 based on the control signal input from the control calculation unit 25.

  According to this embodiment, the following effects can be obtained.

  In the system stabilization device 1, the power flow control amount DT is automatically created periodically by the pre-calculation unit 10. Thus, the correlation graph coefficient KZ is created based on the tidal current control amount DT accumulated over a long period of time. The created correlation graph coefficient KZ can be easily set as a set value in response to a request from the input / output display 17.

  For this reason, the system stabilizing device 1 does not need to prepare input data for calculating a huge number of cases in order to calculate settling data that requires a large amount of calculation. Therefore, even when it is difficult to prepare the input data, appropriate settling data can be set.

  Further, the system stabilizing device 1 continues to create the tidal current control amount DT in advance and periodically. Based on the tidal current control amount DT accumulated by this process, settling data is calculated. Therefore, it is not necessary to perform high-speed calculation so that the calculation of the required control amount in the latest state of the power system 40 is always completed within a predetermined time. For example, even when the power flow control amount DT in the state of the power system 40 at a certain point in time is created, the state of the power system 40 may have already changed considerably. Thereby, even if the computer used for the system stabilizing device 1 does not have a high performance, it can sufficiently satisfy the calculation speed.

  Therefore, according to the present embodiment, it is possible to reduce the manufacturing cost of components such as a computer and reduce the preparation work of input data.

(Second Embodiment)
FIG. 4 is a block diagram showing the configuration of the system stabilizing device 1A according to the second embodiment of the present invention.

  The system stabilizing device 1A includes a pre-calculating unit 10A instead of the pre-calculating unit 10 in the system stabilizing device 1 according to the first embodiment illustrated in FIG. The pre-calculation unit 10A includes a monitoring unit 18A instead of the input / output unit 16 in the pre-calculation unit 10. Other points are the same as those of the system stabilizing device 1.

  The monitoring unit 18A performs monitoring by comparing the correlation graph coefficient KZ read from the correlation graph coefficient storage unit 15 with the correlation graph coefficient KA set as a set value in the set value storage unit 22. The monitoring unit 18A monitors at a relatively slow cycle such as once or several times a day.

  The monitoring unit 18A determines the necessary control amount calculated from the correlation graph coefficient KA, which is a set value, and the correlation read from the correlation graph coefficient storage unit 15 in the range of values that can actually occur in the power transmission line flow before the accident. The required control amount calculated from the graph coefficient KZ is compared.

  When the required control amount calculated from the correlation graph coefficient KA is smaller than the required control amount calculated from the correlation graph coefficient KZ as a result of the comparison, the monitoring unit 18A notifies that there is a possibility of insufficient control. Is output to the input / output display 17.

  When the necessary control amount calculated from the correlation graph coefficient KA is larger than a predetermined threshold value by a comparison threshold value as a result of the comparison, the monitoring unit 18A can perform over-control. An alarm for notifying that there is a possibility is output to the input / output display 17.

  According to the present embodiment, when the state of the power system 40 changes, the operator can know the time when the correlation graph coefficient KA used so far should be updated to the new correlation graph coefficient KZ by an alarm. it can. As a result, even when it is difficult for a person to determine when to update settling data, such as when the power system 40 changes with changes in social conditions, the operator can set the update time of settling data. Can know properly.

(Third embodiment)
FIG. 5 is a block diagram showing the configuration of the system stabilizing device 1B according to the third embodiment of the present invention.

  In the system stabilizing device 1 according to the first embodiment illustrated in FIG. 1, the system stabilizing device 1 </ b> B includes a pre-calculating unit 10 </ b> B instead of the pre-calculating unit 10. In the pre-computation unit 10, the pre-computation unit 10B includes a system change unit 19B and a system change pre-calculation processing unit 12B. Other points are the same as those of the system stabilizing device 1.

  Power system information indicating the current state of the power system 40 is input from the power system information acquisition unit 11 to the system change unit 19B. The operator inputs system change data for changing the power system information to the system change unit 19B. The system changing unit 19B changes the current power system information based on the system change data. Thereby, the system | strain change part 19B can simulate the system | strain different from the state of the present electric power grid | system 40. FIG. The state of the power system 40 different from the current state is, for example, a system at the time of stoppage accompanying maintenance of distribution facilities assumed in the future, or a system at the time of addition of distribution facilities accompanying system expansion expected in the future. The system changing unit 19B outputs the changed power system information to the system changing pre-processing unit 12B.

  The system change pre-processing unit 12B creates power flow control amount data DT based on the power system information changed by the system change unit 19B. The method for creating the tidal current control amount data DT by the system change pre-processing unit 12B is the same as that of the system change pre-processing unit 12 according to the first embodiment. That is, the tidal current pair control amount data DT is data in which the pre-accident power transmission line tidal current and the necessary control amount are paired in the changed state of the power system 40. The system change pre-processing unit 12B stores the created tidal current pair control amount data DT in the tidal current pair control amount data storage unit 13.

  According to the present embodiment, in addition to the operational effects of the first embodiment, the following operational effects can be obtained.

  By providing the system changing unit 19B and the system changing pre-processing unit 12B, the power flow control amount data DT in the state of the power system 40 that is expected to be changed from the current state of the power system 40 can be easily created. can do. Thereby, even when the power system 40 changes due to maintenance of distribution facilities, etc., the correlation graph coefficient KZ considering the power flow control amount data DT in the changed state of the power system 40 can be easily obtained. Can do. Thereby, the system stabilizing device 1B can easily cope with the changing power system 40.

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

  DESCRIPTION OF SYMBOLS 1 ... System | strain stabilization apparatus, 10 ... Pre-computation part, 11 ... Power system information acquisition part, 12 ... Pre-computation processing part, 13 ... Tidal current pair control amount data storage part, 14 ... Correlation graph coefficient preparation part, 15 ... Correlation graph Coefficient storage unit, 16 ... input / output unit, 17 ... input / output indicator, 20 ... stabilization control unit, 21 ... setting unit, 22 ... setting value storage unit, 23 ... generator / power transmission line information acquisition unit, 24 ... Accident detection unit, 25 ... control operation unit, 26 ... control unit, 40 ... power system, 41 ... generator group, 42 ... power transmission line, 43 ... main system, DP ... settling data, DT ... tidal current control amount data , G1, G2, G3, G4 ... generator, KA, KZ ... correlation graph coefficient, LA1, LA2, LB1, LB2 ... transmission line.

Claims (8)

A system stabilization device that stabilizes a power system that transmits power output from a generator through a power transmission line,
Power system information acquisition means for periodically acquiring power system information that is information about the power system;
Based on the power system information acquired by the power system information acquisition means, the necessary control amount necessary for stabilizing the operation of the generator at the time of an accident of the power transmission line and the current flowing through the power transmission line Tidal current control amount data creation means for periodically creating tidal current control amount data, which is data indicating the correlation between
Tidal current pair control amount data storage means for storing the tidal current pair control amount data created by the tidal current pair control amount data creating means;
Coefficient calculation means for calculating a coefficient of a graph indicating a correlation between the necessary control amount and the tidal current based on the tidal current pair control amount data stored in the tidal current control amount data storage means;
Settling means for setting the coefficient calculated by the coefficient calculation means as a set value for creating a control signal for controlling the operation of the generator in the event of an accident in the power system;
System fault detection means for detecting an accident in the power system;
When an accident is detected by the system fault detection means, a control signal creation means for creating the control signal based on the set value set by the settling means;
A system stabilization apparatus comprising: stabilization control means for controlling to stabilize the operation of the generator based on the control signal created by the control signal creation means. Power system information changing means for changing the power system information acquired by the power system information acquiring means;
Based on the power system information changed by the power system information changing means, the power change control amount data creating means for creating a power flow pair control amount data for creating the power flow control amount data,
2. The system stabilization device according to claim 1, wherein the tidal current pair control amount data storage unit stores the tidal current pair control amount data created by the tidal current pair control amount data creation unit for system change. 3. A system stabilization device that stabilizes a power system that transmits power output from a generator through a power transmission line,
Power system information acquisition means for periodically acquiring power system information that is information about the power system;
Based on the power system information acquired by the power system information acquisition means, the necessary control amount necessary for stabilizing the operation of the generator at the time of an accident of the power transmission line and the current flowing through the power transmission line Tidal current control amount data creation means for periodically creating tidal current control amount data, which is data indicating the correlation between
Tidal current pair control amount data storage means for storing the tidal current pair control amount data created by the tidal current pair control amount data creating means;
Coefficient calculation means for calculating a coefficient of a graph indicating a correlation between the necessary control amount and the tidal current based on the tidal current pair control amount data stored in the tidal current control amount data storage means;
Settling means for setting a coefficient of a graph for creating a control signal for stabilizing the operation of the generator at the time of an accident of the power system as a settling value;
When the required control amount based on the coefficient set by the settling means is smaller than the required control amount based on the coefficient calculated by the coefficient calculation means, an insufficient control alarm output that outputs an alarm indicating insufficient control Means,
System fault detection means for detecting an accident in the power system;
When an accident is detected by the system fault detection means, a control signal creation means for creating the control signal based on the set value set by the settling means;
A system stabilization apparatus comprising: stabilization control means for controlling to stabilize the operation of the generator based on the control signal created by the control signal creation means. A system stabilization device that stabilizes a power system that transmits power output from a generator through a power transmission line,
Power system information acquisition means for periodically acquiring power system information that is information about the power system;
Based on the power system information acquired by the power system information acquisition means, the necessary control amount necessary for stabilizing the operation of the generator at the time of an accident of the power transmission line and the current flowing through the power transmission line Tidal current control amount data creation means for periodically creating tidal current control amount data, which is data indicating the correlation between
Tidal current pair control amount data storage means for storing the tidal current pair control amount data created by the tidal current pair control amount data creating means;
Coefficient calculation means for calculating a coefficient of a graph indicating a correlation between the necessary control amount and the tidal current based on the tidal current pair control amount data stored in the tidal current control amount data storage means;
Settling means for setting a coefficient of a graph for creating a control signal for stabilizing the operation of the generator at the time of an accident of the power system as a settling value;
When the required control amount based on the coefficient set by the settling means is larger than the required control amount based on the coefficient calculated by the coefficient calculation means by a predetermined value or more, an excess indicating an alarm indicating excessive control is output. Control alarm output means;
System fault detection means for detecting an accident in the power system;
When an accident is detected by the system fault detection means, a control signal creation means for creating the control signal based on the set value set by the settling means;
A system stabilization apparatus comprising: stabilization control means for controlling to stabilize the operation of the generator based on the control signal created by the control signal creation means. A system stabilization method for stabilizing a power system that transmits power output from a generator through a power transmission line,
Periodically acquiring power system information that is information about the power system;
Based on the acquired power system information, it is data indicating a correlation between a necessary control amount required to stabilize the operation of the generator at the time of an accident of the power transmission line and a power flow flowing through the power transmission line Periodically creating tidal current control amount data;
Storing the created tidal current control amount data;
Calculating a coefficient of a graph indicating a correlation between the necessary control amount and the tidal current based on the stored tidal current pair control amount data;
A step of setting the calculated coefficient as a set value for creating a control signal for performing control to stabilize the operation of the generator in the event of an accident in the power system;
Detecting an accident in the power system;
If an accident is detected, creating the control signal based on the settled settling value;
And a step of controlling to stabilize the operation of the generator based on the generated control signal. Changing the acquired power system information;
Based on the changed power system information, creating the power flow control amount data,
The system stabilization method according to claim 5, further comprising a step of storing the created tidal current pair control amount data based on the changed power system information. A system stabilization method for stabilizing a power system that transmits power output from a generator through a power transmission line,
Periodically acquiring power system information that is information about the power system;
Based on the acquired power system information, it is data indicating a correlation between a necessary control amount required to stabilize the operation of the generator at the time of an accident of the power transmission line and a power flow flowing through the power transmission line Periodically creating tidal current control amount data;
Storing the created tidal current control amount data;
Calculating a coefficient of a graph indicating a correlation between the necessary control amount and the tidal current based on the stored tidal current pair control amount data;
A step of setting a coefficient of a graph for creating a control signal for stabilizing the operation of the generator at a time of an accident of the power system as a set value;
Outputting the alarm indicating insufficient control when the required control amount based on the set coefficient is smaller than the required control amount based on the calculated coefficient;
Detecting an accident in the power system;
If an accident is detected, creating the control signal based on the settled settling value;
And a step of controlling to stabilize the operation of the generator based on the generated control signal. A system stabilization method for stabilizing a power system that transmits power output from a generator through a power transmission line,
Periodically acquiring power system information that is information about the power system;
Based on the acquired power system information, it is data indicating a correlation between a necessary control amount required to stabilize the operation of the generator at the time of an accident of the power transmission line and a power flow flowing through the power transmission line Periodically creating tidal current control amount data;
Storing the created tidal current control amount data;
Calculating a coefficient of a graph indicating a correlation between the necessary control amount and the tidal current based on the stored tidal current pair control amount data;
At the time of an accident in the power system, setting a coefficient of a graph for creating a control signal for stabilizing the operation of the generator as a set value;
A step of outputting an alarm indicating excessive control when the required control amount based on the set coefficient is larger than the required control amount based on the calculated coefficient by a predetermined value;
Detecting an accident in the power system;
If an accident is detected, creating the control signal based on the settled settling value;
And a step of controlling to stabilize the operation of the generator based on the generated control signal.

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