CN106099905B - A kind of power system transient stability emergency control method based on weak steady schematic memory - Google Patents
A kind of power system transient stability emergency control method based on weak steady schematic memory Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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Abstract
The invention discloses a kind of power system transient stability emergency control methods based on weak steady schematic memory, belong to power system and automation technology.The present invention solves the online emergent control of system of weak steady pattern transient safe and stable using large-scale parallel cluster computing, calculate the transient rotor angle stability emergency control policy under the influence of Multimodal interaction, if exciting other potential Failure Models during leading Failure Model control measure schedule sequences Security Checking, it then terminates and dominates Failure Model control measure schedule sequences transient safe and stable quantitative evaluation, and the control measure schedule sequences of potential Failure Model enumerate combining forming new schedule sequences with the leading Failure Model control measure schedule sequences after retracting, it resubmits parallel cluster system and carries out transient safe and stable quantitative evaluation, realize the coordination of control measure between more Failure Models.
Description
Technical field
The invention belongs to power system and automation technologies, and more precisely the present invention relates to one kind based on weak steady
The power system transient stability emergency control method of mould-fixed memory.
Background technology
Emergent control is electric system since large disturbances enter the state of emergency or extreme emergency state, is stablized for anti-locking system
It destroys, operating parameter seriously further expands the control for causing a wide range of power outages and carrying out beyond prescribed limit and accident.Closely
Nian Lai, the online emergent control system that the transient safe and stable emergent control frame based on " on-line pre-decision system, real-time matching " is researched and developed
At home and abroad multiple net provincial region power grid is applied system, in terms of Transient Stability Control, after being directed to forecast failure
Single leading Failure Model, to potentially being caused due to Multimodal interaction in transregional interconnected network, leading Failure Model is pernicious drills
The problem of change, still lacks effective countermeasure, and the complicated variation of bulk power grid Failure Model may lead to the negative effect of stability contorting
It answers.
Transient stability Multimodal interaction influence in the case of, for a certain transient stability pattern control measure to other stabilizations
Pattern may fail or even bring dangerous control negative effect problem, extreme situation that can even excite the successive mistake of other patterns
Surely.Therefore, it is necessary to study the converting of stable form in reply dynamic process, pernicious evolution successfully manages strategy, formulates urgent
Control means optimizing path avoids trying to gather at random, passes through the weak steady mode emergency control to tactful search process and executed
Memory, grasp system unstability Evolution Modes rule, improve emergent control reliability, decision search efficiency simultaneously reduce control generation
Valence.
When electric system due to it is more serious thus enter the state of emergency, to prevent power system transient stability from destroying, operating parameter is tight
Exceed prescribed limit again and accident further expands, need to take corresponding emergent control, when necessary, allows loss a small amount of negative
Lotus.The searching algorithm of these emergent control measures is mostly focused on various stable quantizating index other than repeatedly trying the method for gathering
To controlling the sensitivity techniques of variable.But the algorithm still has limitation at present, on the one hand, stablizes quantizating index and control variable
Between and non-linear relation, be unable to ensure accuracy using one order, and Higher Order Sensitivities are it is difficult to Analytical Expression；Another party
Face, it is discrete control to cut machine, cutting load itself, does not meet the stabilization quantizating index assumed in Calculation of Sensitivity and connects to control variable
It is continuous can be micro-, when unstability Morphological Transitions, it is original cut machine, cutting load control strategy will no longer adapt to new Failure Model.
Invention content
The purpose of the present invention is：In order to improve to Failure Model evolution phenomenon recognition capability in interconnected network, grasp weak steady
Power system transient stability emergency control policy under mould-fixed provides technical foundation for transient stability emergent control, provides one kind and be based on
The power system transient stability emergency control method of weak steady schematic memory.This method by the time-domain simulation results under typical disturb,
The transient stability margin carried out under the system image of weak steady pattern calculates, and grasps peace control and cuts each weak steady pattern pair under machine measure
The stability margin changing rule answered, system of formulating dominate Failure Model and change post-emergency control measure searching route, reduce and sound out
Searching times improve emergent control reliability.
Specifically, what the present invention was realized using technical solution below, include the following steps：
1）It measures local power grid electrical quantity in real time from on-line stability control system platform, obtains power grid typical way data, for
Forecast failure collection, the identification based on EEAC theories to non-coherent pattern present in Critical Group after failure are obtained to exchange section f
={ 1,2 ..., m } are the system weak steady Mode S of cut set={S1,S2,…,Sm, it is calculated using EEAC and is faced under each weak steady pattern
The transient rotor angle stability of all generators that substation is executed equipped with machine of cutting participates in the factor in boundary group, and is arranged successively by descending
Sequence is formed cuts machine control sequence accordingly, by each weak steady pattern it is corresponding cut machine control sequence be expressed as [G i 1, G i 2,…,G i *], whereinmIt is total for existing weak steady pattern,i=1~m, * indicates for theiMatch in kind system weak steady pattern Critical Group
Have the total number of units of generator that machine of cutting executes substation；
2) it is directed to a certain failure that forecast failure is concentrated and carries out power system transient stability time-domain-simulation, obtain with each weak steady
Pattern is the system angle stability nargin of point group's image, according to descending order be arranged in order forη ={η 1,η 2,…, η m, it is false
If whereinkThe system angle stability nargin of a weak steady pattern is minimum, then remembers system angle stability nargin minimum valueη min =η k ；
Ifη min More than or equal to 0, then system angle stability/neutrality under the failure, does not execute emergency control policy, no
Then, it sounds out according to the corresponding machine control sequence of cutting of the corresponding Failure Model of the failure, is kept to weak steady pattern during souning out
Memory, untilη min More than or equal to 0, terminate emergency control policy search；
3）Concentrate all failures all according to step 2 forecast failure）Processing obtains adapting to weak steady pattern under typical way
The transient stability emergency control policy of evolution.
Above-mentioned technical proposal is further characterized by, the step 2）Include the following steps：
2-1）Power system transient stability time-domain-simulation is carried out for a certain failure that forecast failure is concentrated, is obtained with each weak steady
Pattern is the system angle stability nargin of point group's image, according to descending order be arranged in order forη ={η 1,η 2,…, η m, it is false
If whereinkThe system angle stability nargin of a weak steady pattern is minimum, then remembers system angle stability nargin minimum valueη min =η k ；
Ifη min More than or equal to 0, then system angle stability/neutrality under the failure, does not execute emergency control policy；
2-2）Ifη min Less than 0, then dominated according to system thekA weak steady pattern is corresponding, and to cut machine control sequence each
One exploration of superposition, forms exploration sequenceG k 1、G k 1+G k 2、G k 1+G k 2+G k 3..., record cuts board number, cuts machine when often step is soundd out
The angle stability nargin of each weak steady pattern of system after machine peace control measure is cut in position, excision generator general power and takingη j =
{η j 1,η j 2,…, η j m, whereinη j RepresentjThe system stability margin of secondary exploration；
2-3）The is cut after machine if souning out every timekThe system angle stability nargin of a weak steady patternη j k It is still minimum, then cuts
Machine control strategy does not cause system and dominates Failure Model transformation, continues by step 2-2）It sounds out, untilη min More than or equal to 0, terminate
Emergency control policy is searched for, at this time systematic memory to cut board number, cut seat in the plane to set and cut off generator general power be the failure
Lower transient stability emergency control policy, will sound out number at this timejSecondary incision machine total amountG k 1+G k 2+…+G k j Submit urgent decision-premaking
Control system；
2-4）If thejSecondary exploration cuts the weak steady pattern of system angle stability nargin minimum after machine by thekIt is a to becomet
It is a, show to cut machine control strategy and excite system other weak steady patterns, causes system to dominate Failure Model and change, at this time
Such asjMore than 1 withkA weak steady patternjMachine command deployment direction is cut in change on the basis of cutting machine strategy memory result for -1 time
Otherwise directly machine command deployment direction is cut in change, along thetThe direction of a weak steady pattern, which increases, cuts machine controlled quentity controlled variable, forms new examination
Visit sequenceG t 1、G t 1+G t 2、G t 1+G t 2+G t 3..., and remember and cut board number accordingly, cut seat in the plane and set, cut off generator general power
And take cut machine peace control measure after each weak steady pattern of system angle stability nargin, if thetA weak steady pattern cuts machine control
A certain generator is simultaneously positioned at the in direction processedkA weak steady pattern cuts machine sequence, and control strategy memory display overlaps
Generator has been cut off, then skips the generator；
2-5）It is dominated after Failure Model changes such as system and system dominates Failure Model without again after J exploration of experience
Change andη min More than or equal to 0, terminate emergency control policy search, such asjMore than 1 by the failure incision machine total amountG k 1+G k 2+…+G k j-1 +G t 1+G t 2+…+G t J Urgent decision-premaking control system is submitted, such asjEqual to 1 by the failure incision machine total amountG t 1+G t 2+…+G t J Submit urgent decision-premaking control system；Such as system when system, which is dominated, to be soundd out again after Failure Model changes
Leading Failure Model continues to convert again, then repeatedly step 2-4）, untilη min More than or equal to 0, terminates emergency control policy and search
Rope.
Above-mentioned technical proposal is further characterized by, the step 2-1）In, it is imitative according to system time domain under typical fault
Very as a result, all generators are divided into the complementation two groups S groups and A groups using section f as cut set, all generators of section f sending ends
Composition S groups, all generating sets of section f receiving ends are calculated based on EEAC methods using f as this point of group's pattern of cut set section at A groups
The system angle stability nargin of lower system image.
Above-mentioned technical proposal is further characterized by, the step 3）In, concentrate all failures for forecast failure
Emergency control policy is searched for by more machine Parallel Implementations.
Beneficial effects of the present invention are as follows：The present invention carries out weak steady mould by the time-domain simulation results under typical disturb
Transient stability margin under the system image of formula calculates, and grasps peace control and cuts the corresponding stability margin of each weak steady pattern under machine measure
Changing rule, system of formulating dominate Failure Model and change post-emergency control measure searching route, can reduce heuristic search number,
Improve emergent control reliability.The present invention is conducive to power system dispatcher and holds in complication system in moving law,
Basis is proposed to coordinate to formulate transient stability emergency control policy, to the validity of lifting system security and stability control and online
Automate calculated level.
Specific implementation mode
With reference to example, present invention is further described in detail.
One embodiment of the present of invention, principle are temporary using large-scale parallel cluster computing solution weak steady pattern
The online emergent control of system of state safety and stability calculates the transient rotor angle stability emergency control policy under the influence of Multimodal interaction,
If exciting other potential Failure Models during leading Failure Model control measure schedule sequences Security Checking, terminate leading
Failure Model control measure schedule sequences transient safe and stable quantitative evaluation, and the control measure of potential Failure Model are dispatched into sequence
It arranges and enumerate combining forming new schedule sequences with the leading Failure Model control measure schedule sequences after retracting, resubmit
Parallel cluster system carries out transient safe and stable quantitative evaluation, to realize the coordination of control measure between more Failure Models.Specifically
Steps are as follows：
Step 1：It measures local power grid electrical quantity in real time from on-line stability control system platform, obtains power grid typical way data,
For forecast failure collection, the identification based on EEAC theories to non-coherent pattern present in Critical Group after failure is obtained to exchange
Section f={ 1,2 ..., m } are the system weak steady Mode S of cut set={S1,S2,…,Sm, each weak steady mould is calculated using EEAC
The transient rotor angle stability of all generators that substation is executed equipped with machine of cutting participates in the factor in formula lower critical group, and by descending
Successively sequence formed cut machine control sequence accordingly, by each weak steady pattern it is corresponding cut machine control sequence be expressed as [G i 1, G i 2,…,G i *], whereinmIt is total for existing weak steady pattern,i=1~m, * indicates for theiKind system weak steady pattern is faced
The total number of units of generator of substation is executed in boundary group equipped with machine of cutting.
Step 2：Power system transient stability time-domain-simulation is carried out for a certain failure that forecast failure is concentrated, is obtained with each weak steady
Mould-fixed is the system angle stability nargin of point group's image, according to descending order be arranged in order forη ={η 1,η 2,…, η m,
Assuming that whereinkThe system angle stability nargin of a weak steady pattern is minimum, then remembers system angle stability nargin minimum valueη min =η k ；Ifη min More than or equal to 0, then system angle stability/neutrality under the failure, does not execute emergency control policy, otherwise, presses
It is soundd out according to the corresponding machine control sequence of cutting of the corresponding Failure Model of the failure, the memory to weak steady pattern is kept during souning out,
Untilη min More than or equal to 0, terminate emergency control policy search.Specifically, including following processing procedure：
Step 2-1：Power system transient stability time-domain-simulation is carried out for a certain failure that forecast failure is concentrated, is obtained with each weak
Stable mode is the system angle stability nargin of point group's image, according to descending order be arranged in order forη ={η 1,η 2,…,η m, it is assumed that whereinkThe system angle stability nargin of a weak steady pattern is minimum, then remembers system angle stability nargin minimum valueη min =η k ；Ifη min More than or equal to 0, then system angle stability/neutrality under the failure, does not execute emergency control policy.
The computational methods of system angle stability nargin are：According to system time-domain simulation results under typical fault, by all hairs
Motor is divided into using section f as the complementation two groups S groups of cut set and A groups, all generating sets of section f sending ends at S groups, section f by
Hold all generating sets at A groups, the system of system image under being calculated using f as this point of group's pattern of cut set section based on EEAC methods
Angle stability nargin.
Step 2-2：Ifη min Less than 0, then dominated according to system thekA weak steady pattern is corresponding to cut machine control sequence
One exploration of superposition every time, forms exploration sequenceG k 1、G k 1+G k 2、G k 1+G k 2+G k 3..., often step sound out when record cut board number,
Seat in the plane is cut to set, cut off the angle stability nargin that generator general power and taking cuts each weak steady pattern of system after machine peace control measureη j ={η j 1,η j 2,…, η j m, whereinη j RepresentjThe system stability margin of secondary exploration.
Step 2-3：The is cut after machine if souning out every timekThe system angle stability nargin of a weak steady patternη j k Still it is minimum,
It then cuts machine control strategy and does not cause the leading Failure Model transformation of system, continue to sound out by step 2-2, untilη min More than or equal to 0,
Terminate emergency control policy search, at this time systematic memory cut board number, cut seat in the plane set and cut off generator general power be this
Transient stability emergency control policy under failure will sound out number at this timejSecondary incision machine total amountG k 1+G k 2+…+G k j It submits urgent pre-
Decision control system.
Step 2-4：If thejSecondary exploration cuts the weak steady pattern of system angle stability nargin minimum after machine by thekIt is a to become
ThetIt is a, show to cut machine control strategy and excite system other weak steady patterns, causes system to dominate Failure Model and change,
At this time such asjMore than 1 withkA weak steady patternjMachine command deployment is cut in change on the basis of cutting machine strategy memory result for -1 time
Direction（Such asjEqual to 1, directly machine command deployment direction is cut in change）, alongtThe direction of a weak steady pattern, which increases, cuts machine control
Amount, forms new exploration sequenceG t 1、G t 1+G t 2、G t 1+G t 2+G t 3..., and remember and cut board number accordingly, cut seat in the plane and set, cut
Except generator general power and taking cuts the angle stability nargin of each weak steady pattern of system after machine peace control measure, if thetIt is a weak
Stable mode cuts in machine control direction a certain generator while positioned at thekA weak steady pattern cuts machine sequence, and controls plan
Slightly memory display overlaps generator and has cut off, then skips the generator.
Step 2-5：It is dominated after Failure Model changes such as system and the leading Failure Model of system does not have after J exploration of experience
Have and changes again（The weak steady pattern of system angle stability nargin minimum is still thetIt is a）Andη min More than or equal to 0, terminate tight
System is dominated the failure incision machine total amount remembered before Failure Model changes and variation postscript by anxious control strategy search
The failure incision machine total amount recalled submits urgent decision-premaking control system together, i.e., such asjMore than 1 by the failure incision machine total amountG k 1+G k 2+…+G k j-1 +G t 1+G t 2+…+G t J Urgent decision-premaking control system is submitted, such asjEqual to 1 by the failure incision machine total amountG t 1+G t 2+…+G t J Submit urgent decision-premaking control system.
Such as the weak steady of system angle stability nargin minimum when system, which is dominated, to be soundd out again after Failure Model changes
Pattern is no longertIt is a, then mean that system dominates Failure Model and continues to convert again, then repeats in a manner of step 2-4
It is handled, untilη min More than or equal to 0, terminate emergency control policy search.
Step 3：It concentrates all failures all to be handled according to step 2 forecast failure, obtains adapting to weak steady under typical way
The transient stability emergency control policy of Evolution Modes.The transient stability emergency control policy search efficiency of weak steady Evolution Modes takes
Certainly easily cause the failure of weak steady patterns of change in sub-area division complexity and interregional tightness degree, the method for operation, fault set
Different load model, hvdc control mode etc. in number, region, these can all influence on-line pre-decision system emergency control policy table brush
The new time.To ensure the calculating speed of on-line analysis decision-premaking, emergency control policy search can be by more machine Parallel Implementations.
Although the present invention has been described by way of example and in terms of the preferred embodiments, embodiment is not for the purpose of limiting the invention.Not
It is detached from the spirit and scope of the present invention, any equivalent change or retouch done also belongs to the protection domain of the present invention.Cause
This protection scope of the present invention should be using the content that claims hereof is defined as standard.
Claims (4)
1. a kind of power system transient stability emergency control method based on weak steady schematic memory, which is characterized in that including walking as follows
Suddenly：
1) it measures local power grid electrical quantity in real time from on-line stability control system platform, power grid typical way data is obtained, for anticipation
Fault set, the identification based on EEAC theories to non-coherent pattern present in Critical Group after failure are obtained to exchange section f=
{ 1,2 ..., m } are system weak steady Mode S={ S of cut set1,S2,…,Sm, it is calculated using EEAC and is faced under each weak steady pattern
The transient rotor angle stability of all generators that substation is executed equipped with machine of cutting participates in the factor in boundary group, and is arranged successively by descending
Sequence is formed cuts machine control sequence accordingly, and the corresponding machine control sequence of cutting of each weak steady pattern is expressed as [Gi 1,Gi 2,…,
Gi *], wherein m is existing weak steady pattern sum, and i=1~m, * indicate to be directed to i-th kind of system weak steady pattern lower critical group
In equipped with cut machine execute substation the total number of units of generator；
2) be directed to forecast failure concentrate a certain failure carry out power system transient stability time-domain-simulation, obtain be with each weak steady pattern
The system angle stability nargin for dividing group's image, is arranged in order according to descending order as η={ η1,η2,…,ηm, it is assumed that wherein
The system angle stability nargin of k-th of weak steady pattern is minimum, then remembers system angle stability nargin minimum value ηmin=ηk；
If ηminMore than or equal to 0, then system angle stability/neutrality under the failure, does not execute emergency control policy, otherwise, presses
It is soundd out according to the corresponding machine control sequence of cutting of the corresponding Failure Model of the failure, the memory to weak steady pattern is kept during souning out,
Until ηminMore than or equal to 0, terminate emergency control policy search；
3) it concentrates all failures all to be handled according to step 2) forecast failure, obtains adapting to weak steady Evolution Modes under typical way
Transient stability emergency control policy.
2. the power system transient stability emergency control method according to claim 1 based on weak steady schematic memory, feature
It is, the step 2) includes the following steps：
It 2-1) is directed to a certain failure that forecast failure is concentrated and carries out power system transient stability time-domain-simulation, obtain with each weak steady pattern
To divide the system angle stability nargin of group's image, it is arranged in order as η={ η according to descending order1,η2,…,ηm, it is assumed that its
In k-th weak steady pattern system angle stability nargin it is minimum, then remember system angle stability nargin minimum value ηmin=ηk；
If ηminMore than or equal to 0, then system angle stability/neutrality under the failure, does not execute emergency control policy；
If 2-2) ηminLess than 0, then the corresponding machine control sequence of cutting of k-th of weak steady pattern dominated according to system is superimposed every time
One exploration, forms exploration sequence Gk 1、Gk 1+Gk 2、Gk 1+Gk 2+Gk 3..., record cuts board number, cuts seat in the plane when often step is soundd out
Set, cut off generator general power and take the angle stability nargin η of each weak steady pattern of system after cutting machine peace control measurej=
{ηj 1,ηj 2,…,ηj m, wherein ηjRepresent the system stability margin that jth time is soundd out；
If 2-3) souning out the system angle stability nargin η of k-th of weak steady pattern after machine of cutting every timej kIt is still minimum, then cuts machine control
System strategy does not cause system and dominates Failure Model transformation, continues by step 2-2) it sounds out, until ηminMore than or equal to 0, terminate urgent
Control strategy is searched for, at this time systematic memory to cut board number, cut seat in the plane to set and cut off generator general power be temporary under the failure
State stablizes emergency control policy, will sound out j incision machine total amount G of number at this timek 1+Gk 2+…+Gk jUrgent decision-premaking is submitted to control
System；
If 2-4) jth time is soundd out the weak steady pattern of system angle stability nargin minimum after machine of cutting and is become t-th from k-th, table
Bright machine control strategy of cutting excites system other weak steady patterns, causes system to dominate Failure Model and changes, at this time as j is big
In 1 by k-th weak steady pattern jth cut machine strategy memory result -1 time on the basis of change cut machine command deployment direction, otherwise
Directly machine command deployment direction is cut in change, is increased along the direction of t-th of weak steady pattern and is cut machine controlled quentity controlled variable, forms new exploration sequence
Arrange Gt 1、Gt 1+Gt 2、Gt 1+Gt 2+Gt 3..., and remember accordingly cut board number, cut seat in the plane set, cut off generator general power and
The angle stability nargin for taking each weak steady pattern of system after cutting machine peace control measure, if t-th of weak steady pattern cuts machine controlling party
A certain generator cuts machine sequence positioned at k-th weak steady pattern simultaneously in, and control strategy memory display overlaps power generation
Machine has been cut off, then skips the generator；
2-5) such as system is dominated after Failure Model changes and the leading Failure Model of system does not occur again after J exploration of experience
Variation and ηminMore than or equal to 0, terminate emergency control policy search, by failure incision machine total amount G if j is more than 1k 1+Gk 2+…
+Gk j-1+Gt 1+Gt 2+…+Gt JUrgent decision-premaking control system is submitted, by failure incision machine total amount G if j is equal to 1t 1+Gt 2+…
+Gt JSubmit urgent decision-premaking control system；
If the leading Failure Model of system continues to convert when system, which is dominated, to be soundd out again after Failure Model changes again, then
Repeat step 2-4), until ηminMore than or equal to 0, terminate emergency control policy search.
3. the power system transient stability emergency control method according to claim 2 based on weak steady schematic memory, feature
It is, the step 2-1) in, according to system time-domain simulation results under typical fault, all generators are divided into section f
For the complementation two groups S groups and A groups of cut set, all generating sets of section f sending ends are at S groups, and all generating sets of section f receiving ends are at A
Group, the system angle stability nargin of system image under being calculated using f as this point of group's pattern of cut set section based on EEAC methods.
4. according to any power system transient stability emergency control method based on weak steady schematic memory of claims 1 to 3,
It is characterized in that, in the step 3), the emergency control policy of all failures is concentrated to search for by more machines simultaneously for forecast failure
Row is realized.
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| CN106602548B (en) * | 2016-11-25 | 2019-07-05 | 国电南瑞科技股份有限公司 | A kind of identification method of transient state stable key transmission cross-section based on EEAC |
| CN107732906B (en) * | 2017-10-30 | 2020-12-04 | 南京南瑞集团公司 | Cutter cutting control method for dynamically tracking transient power angle weak stability mode |
| CN110994704B (en) * | 2019-12-19 | 2021-05-14 | 国电南瑞科技股份有限公司 | Transient stability prevention control aid decision-making method and device and electronic equipment |
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