CN106684855A - Transient stability emergency control method based on key branch identification - Google Patents
Transient stability emergency control method based on key branch identification Download PDFInfo
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Abstract
The invention provides a transient stability emergency control method based on key branch identification. The method comprises the following steps: (1) operation data of an interconnected power grid are acquired in real time, and data integration and contingency scanning are executed; (2) threatening fault and the corresponding weak section are determined; (3) key branches in the weak section are identified; (4) a sensitivity coefficient between a control measure and a key branch is calculated; and (5) the control measures are ranked according to the sensitivities from large to small, and a control measure table is refreshed. Through the method provided by the invention, a power grid safety stability weak link under large disturbance impact can be identified, effective safety stability control measures are made, and the power grid stability operation ability is enhanced.
Description
Technical field
The present invention relates to a kind of control method of field of power, and in particular to a kind of transient stability recognized based on crucial branch road
Emergency control method.
Background technology
Maintain the transient stability after the impact of power system large disturbances, be realize electrical network it is continuous, it is safe and reliable power supply it is important before
Carry.Therefore, transient stability analysis of power system and control, the always emphasis and focus of power industry circle and academia's research.
From the angular divisions of required disturbed information, transient stability analysis of power system can be divided into two classes with control correlation technique, i.e., based on complete
The method and the method based on the disturbed information in local of the disturbed information of office.
In method based on global disturbed information, extended equal area criterion (EEAC, Extend Equal Area Criterion) method,
By generator responds track in multi-computer system from the disturbed track of unit that Rn spatial clusterings are mapped as R1 spaces, and then can quantitatively comment
Estimate system stability nargin；Transient energy function method then based on the disturbed tracking clustering of all units into the centre of inertia system, research is temporary
Mutual conversion and equilibrium relation between situation energy and transient state kinetic energy, so as to quantitative evaluating system maintenance level.It is disturbed based on the overall situation
The method of information, needs the disturbed trace information of all generators, contains much information, and time-consuming for data acquisition and procession.
In method based on the disturbed information in local, distribution of the branch road transient potential energy method by the disturbed rear Branch Potential Energy of analysis in a network
Change, can recognize that the weak section of exchange；Out-of-Step Splitting Systems device is then using the local such as alternating current circuit apparent impedance, power-factor angle electricity
Tolerance builds off-the-line criterion, implements Fault Isolation control.Based on the method for global disturbed information, information needed amount is few, it is easy to work
Journey is implemented.
However, existing exchange weak section, and the method for implementing Transient Stability Control based on the disturbed information identification in local, will be thin
Weak section is treated as unified entirety, fails further to screen and respectively exchange in section the disturbed track difference of branch road, and according to difference
The minimum branch road of identification stability, i.e., crucial branch road, therefore the implementation result of control measure are difficult to optimize.Need according to exchange
The disturbed track difference in portion of road bureau, the crucial branch road of identification, and select to implement the control measure maximum with the branch road sensitivity, to be lifted
With optimization stability contorting effect.
The content of the invention
To solve above-mentioned deficiency of the prior art, it is an object of the invention to provide a kind of transient stability recognized based on crucial branch road
Emergency control method, can recognize that the lower electricity net safety stable weak link of large disturbances impact, and security and stability control strategy is formulated in optimization,
Lift power grid operation ability.
The purpose of the present invention is realized using following technical proposals：
The present invention provide it is a kind of based on crucial branch road it is a kind of based on crucial branch road (weak section is made up of a plurality of exchange branch road, wherein
The minimum branch road of stability is crucial branch road, and section loses transient stability from the beginning of the branch road, therefore many from weak section
It is identified in bar branch road, and stability contorting effect can be farthest lifted implementing stability contorting for it) identification
Transient stability emergency control method, it is characterised in that the method comprising the steps of：
The transient stability emergency control method of identification, it is theed improvement is that, be the method comprising the steps of：
(1). Real-time Collection interconnected network service data, perform Data Integration and scan with forecast accident；
(2). it is determined that threatening failure and its corresponding weak section；
(3). the crucial branch road in the weak section of identification；
(4). calculating electrical network is formulated offline Stable Control Strategy table and (is described as follows：To ensure power system stability, operation power personnel
The different methods of operation is directed to, substantial amounts of forecast accident scanning (i.e. forecast failure calculating) is done, for threatening power grid operation
Failure, to formulate excision generating set, the excision stability contorting measure such as load.Correspondence failure and its control measure, form one
Control scheme list is opened, during electrical network real time execution, if there is corresponding failure, corresponding control is directly extracted from Policy Table
The control such as machine, cutting load is cut in measure processed, enforcement.Control measure may have multiple, arrange in sequence, and the present invention is pin
To these control measure, there is provided a kind of sequencing selection method based on sensitivity, so that control effect is optimal) middle control
Sensitivity coefficient between measure and crucial branch road；
(5). by the descending sequence control strategy of sensitivity coefficient, refresh control Policy Table.
Further, the step (1) includes：
(2-1). by automation system for the power network dispatching (EMS) gather interconnected network real-time running data, including Operating Voltage,
Branch power and generator output；
(2-2). using the data integration function of power grid security analyzing and alarming system, form online Load flow calculation and multilayer output feedback network
Data；
(2-3). concentrate from forecast accident, failure is chosen successively and is scanned calculating, form scanning result；The contingency set
Single loop line, alternating current circuit three-phase shortcircuit are cut-off including alternating current circuit three-phase shortcircuit cut-off double loop in parallel, and direct current list is bipolar closes
The contingency sets such as lock.
Further, in the step (2), according to scanning result, filter out electrical network and face transient state generator rotor angle unstability threat failure Ft；
Using oscillation center localization method, i.e., branch voltage distribution is calculated using exchange branch road both end voltage and the disturbed information of branch power,
If voltage minimum point is located in the branch road, the branch road is oscillation center drop point branch road, a plurality of oscillation center drop point exchanges branch road structure
Into set, as with transient state generator rotor angle unstability threaten failure FtCorresponding AC network weakness section.
Further, the step (3) includes：
(3-1). to each bar branch road in AC network weakness section, determine disturbed rear i-th exchange branch road active-power PilFor the first time
Reach the moment t corresponding to maximum1c, using following formula 1) identification reach P at firstilThe exchange branch road i of maximum；
I=min { t1c,t2c,…,tnc} 1)
Wherein：t1c,t2c,…,tncDisturbed rear i-th exchange branch road active-power P is represented respectivelyilReach corresponding to maximum for the first time
Moment, reach moment corresponding to maximum for the second time ..., n-th reaches moment corresponding to maximum；
(3-2). i-th identified exchange branch road of correspondence, in i-th exchange branch road active-power PilAt the maximum moment, investigate
I-th exchange branch road active-power Pil, i-th exchange branch road two ends busbar voltage product UisrBranch road two ends are exchanged with i-th female
Line voltage generator rotor angle difference δilWhether three electric parameters variation characteristics meet formula 2), if meeting formula 2), show that electrical network is disturbed greatly
Whether dynamic, needing further to investigate needs to take Transient Stability Control measure；If being unsatisfactory for formula 2), show that system is only subject to
Little interference, without the need for taking control measure, is back to step 1)；
|Pil-Pil0| ＞ εP,|δil-δil0| ＞ εδ,|Uisr-Uisr0| ＞ εU 2)
(3-3). the identified exchange branch road i of correspondence, in its PilAt the maximum moment, investigate whether electric parameters variation characteristic meets public affairs
Formula 3), that is, investigate i-th exchange branch road two ends busbar voltage generator rotor angle difference δ of correspondenceilWhether rate of change is more than zero, i.e. δilWhether tend to
Increase；Both end voltage amplitude product UisrWhether rate of change is less than zero, i.e. UisrWhether tend to reducing；If meeting formula 3), table
Bright exchange branch road i is the crucial branch road for being identified, continues executing with step (4)；If being unsatisfactory for, show that electrical network has stability,
Stability contorting need not be carried out, step (1) is back to；
Wherein：Pil0、Uisr0、δil0The steady-state operation value of respectively i-th exchange branch road active power, i-th exchange branch road
The steady-state operation value of two ends busbar voltage product exchanges busbar voltage generator rotor angle poor steady-state operation value in branch road two ends with i-th；εP、
εU、εδThe change deviation threshold of respectively i-th exchange branch road active power, i-th exchange branch road two ends busbar voltage product
Change deviation threshold busbar voltage generator rotor angle poor change deviation threshold in branch road two ends is exchanged with i-th.
Further, the step (4) includes：
(4-1). from network stability control Policy Table, different stability contorting measures are extracted successively, including machine of cutting and dc power
Measure for improvement；
(4-2). again failure F is threatened to transient state generator rotor angle unstabilitytSimulation calculation, and in i-th exchange branch road active-power PilReach
Moment t corresponding to maximumcImplement different control measure；By active power controller amount Δ PcT () exchanges branch road pair with i-th
Active power variation delta P answeredilT (), calculates the sensitivity coefficient S between control measure and crucial branch roadic, such as formula 4) shown in：
Wherein：ΔPcT () represents active power controller amount, Δ PilThe corresponding power variation of i-th exchange branch road of (t) expression.
Further, the step (5) includes：
(5-1). according to the sensitivity coefficient S between control measure and crucial branch roadicFrom large to small, correspondence control measure are carried out successively
Sequence；The forward control of sequence, it is strong to reducing the wave action of crucial branch power, and it is good to improve stabilizing effect, prioritizing selection；
(5-2). according to the control measure after sequence, refresh control Policy Table, after further lifting electrical network reply large disturbances impact
Stable operation ability.
Compared with immediate prior art, the excellent effect that the technical scheme that the present invention is provided has is：
The crucial branch road identification provided by the present invention and transient stability emergency control method, can be screened based on the disturbed information in local
Go out the minimum exchange branch road of the stability of a system after large disturbances impact, and it is best that, implementation result most sensitive with the branch road may be selected
Stability contorting measure, further lift system maintenance level.
Description of the drawings
Fig. 1 is the flow chart of the transient stability emergency control method recognized based on crucial branch road that the present invention is provided；
Fig. 2 is the disturbed trajectory diagram of each branch road active power in weak section in the embodiment that the present invention is provided；
Fig. 3 is the disturbed trajectory diagram of each branch road both end voltage phase difference in weak section in the embodiment for providing of the invention；
Fig. 4 for each branch road both end voltage amplitude product in weakness section in the embodiment that provides of the present invention disturbed trajectory diagram；
△ δ-△ ω contrast trajectory diagrams in the embodiment that Fig. 5 is provided for the present invention based on crucial branch road stability contorting effect；
Generator's power and angle difference contrast trajectory diagram in the embodiment that Fig. 6 is provided for the present invention based on crucial branch road stability contorting effect.
Specific embodiment
The specific embodiment of the present invention is described in further detail below in conjunction with the accompanying drawings.
The following description and drawings fully illustrate specific embodiments of the present invention, to enable those skilled in the art to put into practice it
.Other embodiments can include structure, logic, it is electric, process and it is other changes.Embodiment only generation
The possible change of table.Unless explicitly requested, otherwise single component and function are optional, and the order for operating can change.
The part of some embodiments and feature can be included in or replace part and the feature of other embodiments.The enforcement of the present invention
The scope of scheme includes the gamut of claims, and all obtainable equivalent of claims.Herein,
These embodiments of the present invention individually or generally can be represented with term " invention " that this is used for the purpose of facilitating, and
And if in fact disclosing the invention more than, the scope for being not meant to automatically limit the application is any single invention or sends out
Bright design.
The present invention provides a kind of transient stability emergency control method recognized based on crucial branch road, can recognize that the lower electricity of large disturbances impact
Security and stability control strategy is formulated in net safety and stability weak link, optimization, lifts power grid operation ability, and its flow chart is as schemed
Shown in 1, comprise the following steps：
(1). Real-time Collection interconnected network service data, perform Data Integration and scan with forecast accident；By power network schedule automation system
System (EMS) collection interconnected network real-time running data, including Operating Voltage, branch power, generator output etc.；Using
The data integration function of power grid security analyzing and alarming system, forms online Load flow calculation and multilayer output feedback network data；From anticipation thing
Therefore concentrate, failure is chosen successively is scanned calculating, form scanning result.
(2). it is determined that threatening failure and its corresponding weak section；According to scanning result, systems face transient state generator rotor angle unstability prestige is filtered out
Failure F of the side of bodyt；Using oscillation center localization method, determine that oscillation center drop point exchanges set of fingers, and thus build and FtTherefore
Hinder corresponding AC network weakness section.
(3). the crucial branch road in the weak section of identification：
To each bar branch road in AC network weakness section, determine that disturbed rear branch road active power is reached corresponding to maximum for the first time
Moment tc, using formula 1) identification reach P at firstlThe exchange branch road i of maximum.
I=min { t1c,t2c,…,tnc} 1)
The identified exchange branch road i of correspondence, in its active-power PilAt the maximum moment, investigate active-power Pil, branch road two ends
Busbar voltage product Uisrδ poor with generator rotor angleilWhether three electric parameters variation characteristics meet formula 2), wherein Pil0、Uisr0、δil0Respectively
For the steady-state operation value of each electric parameters, εP、εU、εδRespectively each electric parameters change deviation threshold.If meeting formula 2), show
System is subject to large disturbances, and whether need further to investigate needs to take Transient Stability Control measure；If being unsatisfactory for formula 2), table
Bright system is only subject to little interference, without the need for taking control measure, is back to step (1).
|Pil-Pil0| ＞ εP,|δil-δil0| ＞ εδ,|Uisr-Uisr0| ＞ εU 2)
The identified exchange branch road i of correspondence, in its PilAt the maximum moment, investigate whether electric parameters variation characteristic meets formula (3).
It is, investigating correspondence branch road two ends busbar voltage phase difference δilWhether rate of change is more than zero, i.e. δilWhether increase is tended to；Two ends
Voltage magnitude product UisrWhether rate of change is less than zero, i.e. UisrWhether tend to reducing.If meeting formula 3), execution step (4)；
If being unsatisfactory for, show that the stability of a system preferably, without the need for carrying out stability contorting, is back to step (1).
(4). calculate the sensitivity coefficient between control measure and crucial branch road in former Policy Table：
From former network stability control Policy Table, different stability contorting measures are extracted successively, such as cut machine, dc power and lifted
Measure.Failure F is carried out againtSimulation calculation, and in tcMoment implements different control measure, by controlled quentity controlled variable △ Pc(t) with exchange
The corresponding power variation △ P of branch road iilT (), calculates the sensitivity coefficient S between control measure and crucial branch roadic, such as formula 4) and institute
Show.
(5). by the descending sequence control strategy of sensitivity, refresh control Policy Table：According to sensitivity coefficient SicFrom large to small,
Correspondence control measure are sorted successively.The forward control of sequence, it is strong to reducing the wave action of crucial branch power, improves
Stabilizing effect is good, answers prioritizing selection.According to the control measure after sequence, refresh control Policy Table is big to lift electrical network reply
Stable operation ability after disturbance impact.
Embodiment
(1). Real-time Collection interconnected network service data, perform Data Integration and calculate with forecast accident scanning
By taking south electric network AC/DC parallel transmission system as an example, Real-time Collection real-time data of power grid, including generator operation exert oneself,
The off line load of transformer station, each bus run voltage, each exchange branch road operation power etc.；Power application system on-line analysis system,
It is integrally formed the trend corresponding with actual operating mode and multilayer output feedback network data；Power application power system transient stability calculates journey
Sequence, such as PSD-BPA, for forecast accident concentrate each failure logging, such as alternating current circuit N-1 failures, N-2 failures,
Direct current one pole locking failure, bipolar locking failure etc., perform fault scanning and calculate, and writing scan result of calculation.
(2). it is determined that threatening failure and its corresponding weak section
According to fault scanning result of calculation, threat failure is filtered out, i.e. the lower AC/DC Southern system of disturbance impact loses transient state generator rotor angle
The failure of stability.In record system oscillatory process, the exchange set of fingers of oscillation center drop point, the set constitutes correspondence
The system weakness section of the fault disturbance.Correspondence Xingyi-natural bridge exchange branch road fault-free is cut-off, while Xingren-Baoxing direct current
Circuit bipolar locking failure, south electric network loses transient stability, and the failure is the threat failure of system.To should failure, vibration
Drop point is distinguished in Liping-Guilin and Du Shan-rivers and ponds branch road in center, therefore this two branch roads constitute the weak section of system.
(3). the crucial branch road in the weak section of identification
To each bar branch road in AC network weakness section, determine that disturbed rear branch road active power is reached corresponding to maximum for the first time
Moment tc, P is reached at first using formula (1) identificationlThe exchange branch road i of maximum.As shown in Fig. 2 Liping-Guilin branch road
It is identified branch road i that active power reaches maximum, i.e. Liping-Guilin branch road prior to only mountain-rivers and ponds branch road.
I=min { t1c,t2c,…,tnc} 1)
The identified Liping-Guilin branch road of correspondence, at its maximum moment, investigates active-power Pil, branch road two ends bus electricity
Pressure product Uisrδ poor with generator rotor angleilWhether three electric parameters variation characteristics meet formula 2), wherein Pil0、Uisr0、δil0Respectively each electricity
The steady-state operation value of tolerance, εP、εU、εδRespectively each electric parameters change deviation threshold.If meeting formula 2), show that system is received
Whether to large disturbances, needing further to investigate needs to take Transient Stability Control measure；If being unsatisfactory for formula 2), show system
Little interference is only subject to, without the need for taking control measure, step (1) is back to.As shown in Fig. 2,3 and 4, Liping-Guilin exchange
The active-power P of branch roadil, voltage Uisr, generator rotor angle difference δilIt is all higher than the deviation threshold of respective electric amount, you can confirmation system is subject to
Whether large disturbances, need to further investigate needs to take Transient Stability Control measure.
|Pil-Pil0| ＞ εP,|δil-δil0| ＞ εδ,|Uisr-Uisr0| ＞ εU 2)
The identified exchange branch road of correspondence, at its active power maximum moment, investigates whether each electric parameters variation characteristic meets
Formula 3), correspondence branch road two ends busbar voltage phase difference δilWhether rate of change is more than zero, i.e. δilTend to increase；Both end voltage amplitude
Product UisrWhether rate of change is less than zero, i.e. UisrWhether tend to reducing.Show the stability of a system if being unsatisfactory for preferably, without the need for entering
Row stability contorting, is back to step (1).
Correspondence Fig. 2,3 and 4 can be seen that and exchange the t that branch road active power reaches maximum in Liping-GuilinaAt the moment, it two
End busbar voltage phase difference tends to increase, and two ends busbar voltage amplitude product then tends to reducing, i.e., each electric parameters variation characteristic meets
Formula 3).Hence, it can be determined that Liping-Guilin is the crucial branch road of system, and needs to take control measure, lifted stable
Level.
(4). calculate the sensitivity coefficient between control measure and crucial branch road in former Policy Table
From former network stability control Policy Table, different stability contorting measures are extracted successively, such as cut machine measure.Carry out again
Failure FtSimulation calculation, and in tcMoment implements different control measure, by controlled quentity controlled variable △ Pc(t) with exchange the corresponding work(of branch road i
Rate variable quantity △ PilT (), calculates the sensitivity coefficient S between control measure and crucial branch roadic, such as formula 4) shown in.
Cut-off for Xingyi-natural bridge exchange branch road fault-free, while Xingren-Baoxing DC line bipolar locking failure, successively
The control measure in Stable Control Strategy table are extracted, Goupitan Power Plant is such as cut, is cut duck small stream Power Plant, Qie Faer power plant machine
Machine controlled quentity controlled variable △ P is cut in group etc., calculatingcAnd its corresponding Liping-Guilin branch road active power variable quantity △ Pil, counted using formula (4)
Calculate sensitivity coefficient Sic, as a result as shown in table 1.
Table 1 controls the sensitivity index between unit and crucial branch road
(5). by the descending sequence control strategy of sensitivity, refresh control Policy Table.
According to sensitivity coefficient SicFrom large to small, correspondence control measure are sorted successively.The forward control of sequence, it is to drop
Low crucial branch power wave action is strong, and it is good to improve stabilizing effect, answers prioritizing selection.According to the control measure after sequence, brush
New control scheme list, to lift the stable operation ability after electrical network reply large disturbances impact.
Sensitivity coefficient shown in table 1 is corresponded to results, it can be seen that cutting the corresponding sensitivity coefficient maximum of Goupitan Power Plant,
The control measure are taken to improve stabilizing effect good.As it can be seen in figures 5 and 6, identical controlled quentity controlled variable effect under, based on Liping-
The Transient Stability Control of Guilin key branch road identification, can further reduce the generator's power and angle amplitude of oscillation, lift the transient stability water of electrical network
It is flat.
Above example is only to illustrate technical scheme rather than a limitation, although reference above-described embodiment is to the present invention
Be described in detail, those of ordinary skill in the art still can to the present invention specific embodiment modify or
Person's equivalent, these any modifications or equivalent without departing from spirit and scope of the invention are applying for pending this
Within bright claims.
Claims (6)
1. it is a kind of based on crucial branch road recognize transient stability emergency control method, it is characterised in that methods described include following step
Suddenly：
(1). Real-time Collection interconnected network service data, perform Data Integration and scan with forecast accident；
(2). it is determined that threatening failure and its corresponding weak section；
(3). the crucial branch road in the weak section of identification；
(4). calculating electrical network formulates offline the sensitivity coefficient in Stable Control Strategy table between control measure and crucial branch road；
(5). by the descending sequence control strategy of sensitivity coefficient, refresh control Policy Table.
2. method according to claim 1, it is characterised in that the step (1) includes：
(2-1). automation system for the power network dispatching gathers the data of interconnected network real time execution, including Operating Voltage, branch road work(
Rate and generator output；
(2-2). using the data integration function of power grid security analyzing and alarming system, form online Load flow calculation and multilayer output feedback network
Data；
(2-3). concentrate from forecast accident, failure is chosen successively and is scanned calculating, form scanning result；The contingency set
Single loop line, alternating current circuit three-phase shortcircuit are cut-off including alternating current circuit three-phase shortcircuit cut-off double loop in parallel, and direct current list is bipolar closes
The contingency sets such as lock.
3. the method for claim 1, it is characterised in that in the step (2), according to scanning result, filters out electrical network
Face transient state generator rotor angle unstability and threaten failure Ft；Using oscillation center localization method, i.e., using exchange branch road both end voltage and branch road
The disturbed information of power calculates branch voltage distribution, if voltage minimum point is located in the branch road, the branch road is oscillation center drop point
Road, the set that a plurality of oscillation center drop point exchange branch road is constituted, as threatens failure F with transient state generator rotor angle unstabilitytCorresponding alternating current
The weak section of net.
4. the method for claim 1, it is characterised in that the step (3) includes：
(3-1). to each bar branch road in AC network weakness section, determine disturbed rear i-th exchange branch road active-power PilFor the first time
Reach the moment t corresponding to maximum1c, using following formula 1) identification reach P at firstilThe exchange branch road i of maximum；
I=min { t1c,t2c,...,tnc} 1)
Wherein：t1c,t2c,...,tncDisturbed rear i-th exchange branch road active-power P is represented respectivelyilReach corresponding to maximum for the first time
Moment, reach moment corresponding to maximum for the second time ..., n-th reaches moment corresponding to maximum；
(3-2). i-th identified exchange branch road of correspondence, in i-th exchange branch road active-power PilAt the maximum moment, investigate
I-th exchange branch road active-power Pil, i-th exchange branch road two ends busbar voltage product UisrBranch road two ends are exchanged with i-th female
Line voltage generator rotor angle difference δilWhether three electric parameters variation characteristics meet formula 2), if meeting formula 2), show that electrical network is disturbed greatly
Whether dynamic, needing further to investigate needs to take Transient Stability Control measure；If being unsatisfactory for formula 2), show that system is only subject to
Little interference, without the need for taking control measure, is back to step 1)；
|Pil-Pil0| ＞ εP,|δil-δil0| ＞ εδ,|Uisr-Uisr0| ＞ εU 2)
(3-3). the identified exchange branch road i of correspondence, in its PilAt the maximum moment, investigate whether electric parameters variation characteristic meets public affairs
Formula 3), that is, investigate i-th exchange branch road two ends busbar voltage generator rotor angle difference δ of correspondenceilWhether rate of change is more than zero, i.e. δilWhether tend to
Increase；Both end voltage amplitude product UisrWhether rate of change is less than zero, i.e. UisrWhether tend to reducing；If meeting formula 3), table
Bright exchange branch road i is the crucial branch road for being identified, continues executing with step (4)；If being unsatisfactory for, show that electrical network has stability,
Stability contorting need not be carried out, step (1) is back to；
Wherein：Pil0、Uisr0、δil0The steady-state operation value of respectively i-th exchange branch road active power, i-th exchange branch road
The steady-state operation value of two ends busbar voltage product exchanges busbar voltage generator rotor angle poor steady-state operation value in branch road two ends with i-th；εP、
εU、εδThe change deviation threshold of respectively i-th exchange branch road active power, i-th exchange branch road two ends busbar voltage product
Change deviation threshold busbar voltage generator rotor angle poor change deviation threshold in branch road two ends is exchanged with i-th.
5. the method for claim 1, it is characterised in that the step (4) includes：
(4-1). from network stability control Policy Table, different stability contorting measures are extracted successively, including machine of cutting and dc power
Measure for improvement；
(4-2). again failure F is threatened to transient state generator rotor angle unstabilitytSimulation calculation, and in i-th exchange branch road active-power PilReach
Moment t corresponding to maximumcImplement different control measure；By active power controller amount Δ PcT () exchanges branch road pair with i-th
Active power variation delta P answeredilT (), calculates the sensitivity coefficient S between control measure and crucial branch roadic, such as formula 4) shown in：
Wherein：ΔPcT () represents active power controller amount, Δ PilThe corresponding power variation of i-th exchange branch road of (t) expression.
6. the method for claim 1, it is characterised in that the step (5) includes：
(5-1). according to the sensitivity coefficient S between control measure and crucial branch roadicFrom large to small, correspondence control measure are carried out successively
Sequence；The forward control of sequence, it is strong to reducing the wave action of crucial branch power, and it is good to improve stabilizing effect, prioritizing selection；
(5-2). according to the control measure after sequence, refresh control Policy Table, after further lifting electrical network reply large disturbances impact
Stable operation ability.
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| CN108448573A (en) * | 2018-03-20 | 2018-08-24 | 国电南瑞科技股份有限公司 | The adaptive remediation policy in line closed loop emergency control system plant stand end |
| CN109217298A (en) * | 2018-09-29 | 2019-01-15 | 南瑞集团有限公司 | A kind of emergency control policy calculation method for coping with the successive event of dynamic process |
| CN109861214A (en) * | 2019-02-28 | 2019-06-07 | 中国电力科学研究院有限公司 | Judge method, the system of regional power grid transient rotor angle stability weakness route |
| CN111697562A (en) * | 2020-04-27 | 2020-09-22 | 中国电力科学研究院有限公司 | SVM-based transient stability prevention control strategy generation method and device |
| CN111969661A (en) * | 2020-07-29 | 2020-11-20 | 中国电力科学研究院有限公司 | Method and system for improving dynamic voltage regulation capability of adjusting active power of generator |
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| CN107910879B (en) * | 2017-11-10 | 2019-11-26 | 大连理工大学 | A kind of active frequency response events control strategy |
| CN108448573A (en) * | 2018-03-20 | 2018-08-24 | 国电南瑞科技股份有限公司 | The adaptive remediation policy in line closed loop emergency control system plant stand end |
| CN108448573B (en) * | 2018-03-20 | 2021-02-23 | 国电南瑞科技股份有限公司 | On-line closed loop emergency control system plant station end self-adaptive remediation strategy |
| CN109217298A (en) * | 2018-09-29 | 2019-01-15 | 南瑞集团有限公司 | A kind of emergency control policy calculation method for coping with the successive event of dynamic process |
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| CN111697562B (en) * | 2020-04-27 | 2022-11-11 | 中国电力科学研究院有限公司 | SVM-based transient stability prevention control strategy generation method and device |
| CN111969661A (en) * | 2020-07-29 | 2020-11-20 | 中国电力科学研究院有限公司 | Method and system for improving dynamic voltage regulation capability of adjusting active power of generator |
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