CN104319779A - Regional power grid reactive voltage control method - Google Patents
Regional power grid reactive voltage control method Download PDFInfo
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- CN104319779A CN104319779A CN201410553543.6A CN201410553543A CN104319779A CN 104319779 A CN104319779 A CN 104319779A CN 201410553543 A CN201410553543 A CN 201410553543A CN 104319779 A CN104319779 A CN 104319779A
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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
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
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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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a regional power grid reactive voltage control method, and the method comprises the steps as follows: S1, building the power grid topology network covering all power substations in the whole network; S2, real time collecting power grid real time data in regional power grid and extracting effective real time data; S3, calculating and analyzing the effective real time data, obtaining more than one control strategy for realizing reserve area power grid reactive voltage control target by capacitor switching or transformer gear adjusting operation, generating the control strategy set; S4, combining the power grid topology network, selecting optimum control strategy with least operation step to the capacitor or transformer; S5, judging the optimum control strategy; when the optimum control strategy is right, generating power grid remote control command, when the optimum control strategy is wrong, returning to the step S3; S6, realizing reactive voltage control target according to the power grid remote control command and returning to the step S2. The regional power grid reactive voltage control method can have reactive control for regional power grid and have smallest power loss.
Description
Technical field
The present invention relates to technical field of electric power automation, particularly relate to a kind of area power grid reactive voltage control method.
Background technology
The stable of voltage can be guaranteed the normal operation of various electric equipment and extend its useful life, the raising day by day required power supply quality along with user, and rate of qualified voltage becomes the subject matter that they are concerned about very much.For the consideration of economy, can not long-distance sand transport reactive power in electrical network, with the energy loss avoiding long-distance transmissions reactive power to cause as far as possible.Simultaneously, voltage and Reactive Power Control are one and are related to and ensure power supply quality, meet user's reactive power demand and the qualified problem of system voltage, also be the effective measures reducing network loss, improve operation of power networks economy, be constantly subject to the close attention of power system operation personnel.Therefore in electric power system, realize voltage & reactive power-control there is extensive and important economic benefit and social benefit.
Current part electric substation has had VQC (VQC) putting into operation.This device is generally that the position on the administrative division map that runs according to this electric substation provides control measure, meets the reasonable layout of the builtin voltage requirement of this electric substation and reactive power.This electric substation step voltage is idle local optimum Comprehensive Control Technology comparative maturity, but still have following deficiency: the optimization that local one, can only be realized, system-wide optimal control can not be realized, and only can ensure that controlled busbar voltage is qualified, can not reach the object that the whole network power loss is minimum; Two, there will be voltage at secondary on-load voltage regulation electrical network frequently to adjust, easily cause voltage-regulation un-reasonable phenomenon, not enough to the regulating power of terminal voltage in three-winding transformer; Three, the regulable control of VQC device is based on given voltage power-less upper lower limit value, the determination of voltage power-less upper lower limit value will rely on the experience of attendant, lack a set of effective computational methods, if upper lower limit value is given unreasonable, no matter how perfect regulation measure is, all can not reasonably be controlled; Four, each electric substation all needs to drop into VQC device, also can increase the equipment investment of power supply enterprise.
Summary of the invention
Based on the technical problem that background technology exists, the present invention proposes a kind of area power grid reactive voltage control method, while realizing the reactive power/voltage control target of area power grid, the object that the whole network power loss is minimum can be reached.
A kind of area power grid reactive voltage control method that the present invention proposes, electric network model is utilized to set up the topological network covering each electric substation of the whole network, by Real-time Collection real-time data of power grid, the whole network is monitored, and ensureing to be optimized control to area power grid under the prerequisite that the whole network voltage is qualified by capacitor switching and transformer gear adjustment according to reactive power/voltage control target; Said method comprising the steps of:
The power network topology network of S1, the foundation covering each electric substation of the whole network;
The real-time data of power grid of S2, Real-time Collection area power grid also detects, and the qualified real-time data of power grid of detection is carried out analyzing and processing and extracts effective real time data;
S3, computational analysis is carried out to effective real time data, obtain and be no less than one and regulate by capacitor switching or transformer gear the control strategy realizing predetermined area power grid reactive power/voltage control target, and generate control strategy set;
S4, in conjunction with power network topology network, analyze each control strategy implement after the whole network running status, ensureing to select under the prerequisite that the whole network voltage is qualified to capacitor or the minimum optimal control policy of transformer operating step;
S5, optimal control policy to be judged; When optimal control policy is correct, generates electrical network remote control command, when optimal control policy is incorrect, return step S3;
S6, regulate the capacitor switching state or transformer gear of specifying according to electrical network remote control command, after realizing reactive power/voltage control target, return step S2.
Preferably, step S1 is specially: to do root node be that child node is set up and is no less than a trunk net with secondary substation with local one time power transformation, generate power network topology network in conjunction with all trunk nets of the whole network.
Preferably, step S2 is specially: in the trunk net that area power grid is corresponding, travel through each child node gather real-time data of power grid and detect, the qualified real-time data of power grid of detection is averaging processing and extracts effective real time data, and by effective real time data back-up storage.
Preferably, in step S2, the data validation of message correctness School Affairs is comprised to the detection of real-time data of power grid.
Preferably, the real-time data of power grid gathered in step S2 comprises: the on off state of electric substations at different levels main transformer and capacitor, disconnecting link state; The current gear of electric substations at different levels transformer; Meritorious, idle, the voltage of electric substation at different levels; Relay protection signal.
Preferably, relay protection signal comprises: capacitor faults signal and main transformer fault-signal.
Preferably, step S3 is specially: analyze effective real time data, calculate power factor of electric network, primary substation be idle, the reactive power compensation redundancy K of the capacitor of each substation busbars voltage and each electric substation and capacitor switching coefficient M, and rank with clear and definite switching order to the M value of each capacitor, analysis acquisition is no less than one and regulates with the control strategy realizing area power grid reactive power/voltage control target by capacitor switching or transformer gear, and generates control strategy set.
Preferably, in step S3, area power grid reactive power/voltage control target is obtained by communication or manually arranges.
Whether preferably, in step S5, the standard of optimal control policy correctness is: grid equipment can be caused abnormal, whether exceeds number of operations restriction, whether exceeds operating time interval, whether can realize electric network reactive-load voltage control target.
Preferably, it is characterized in that, in step S5, when optimal control policy is correct, by its back-up storage, and generate electrical network remote control command.
The local optimum that present invention achieves the online optimal reactive power dispatch of electrical network the whole network and idle control objectives controls to coordinate automatically, improve the quality of voltage of whole electrical network, reduce electric network active loss, can ensure that the voltage of each transformer station is qualified, regulate action promptly and accurately, meet actual motion demand.
The present invention, in conjunction with power network topology network, can either realize the optimization of partial electric grid, can realize again the optimal control of the whole network, while the controlled busbar voltage of guarantee is qualified, can also reach the object that the whole network power loss is minimum.
The present invention preferentially chooses the multiple embodiments that can realize network optimization target in conjunction with the whole network situation, and judges remote control command, to ensure that the mode by most advantages of simple, step are minimum realizes network optimization target.
The present invention, according to each electric substation building topology network, to carry out data acquisition and monitoring adjustment by the mode of traverse node to each electric substation, is conducive to the preciseness improving the whole network inspection, avoids omitting.
The present invention can realize the voltage & var control of the whole network according to the operation information of the whole network system, thus ensures the reasonable layout of the qualified and reactive power of quality of voltage in network-wide basis.
Accompanying drawing explanation
Fig. 1 is a kind of area power grid reactive voltage control method flow chart that the present invention proposes.
Fig. 2 is a kind of area power grid reactive voltage control system structural representation.
Embodiment
With reference to Fig. 1, a kind of area power grid reactive voltage control method that the present invention proposes, electric network model is utilized to set up the topological network covering local each electric substation, by Real-time Collection real-time data of power grid, the whole network is monitored, and ensureing to be optimized control to regional the whole network under the prerequisite that the whole network voltage is qualified by capacitor switching and transformer gear adjustment according to reactive power/voltage control target.
This area's electric network reactive-load voltage control method comprises the following steps:
S1, the root node be that child node is set up and is no less than a trunk net with secondary substation of doing with local one time power transformation, generate power network topology network in conjunction with all trunk nets of the whole network.
In this step topological network should cover local all electric substation and meet local power grid model actual conditions.
S2, in the trunk net that area power grid is corresponding, travel through each child node gather real-time data of power grid detecting, the qualified real-time data of power grid of detection is averaging processing and extracts effective real time data, and by effective real time data back-up storage.
In this step, real-time data of power grid comprises: the on off state of electric substations at different levels main transformer and capacitor, disconnecting link state; The current gear of electric substations at different levels transformer; Meritorious, idle, the voltage of electric substation at different levels; Relay protection signal etc.Wherein, the current gear of the on off state of electric substations at different levels main transformer and capacitor, disconnecting link state, electric substations at different levels transformer belongs to electrical network remote signalling data, and meritorious, idle, the voltage of electric substation at different levels belong to electrical network telemetry.Relay protection signal comprises: capacitor faults signal and main transformer fault-signal etc.
In this step, the real-time data of power grid of collection is more comprehensive, is more conducive to the accurate judgement to electrical network real-time status.
The data validation of message correctness School Affairs is comprised to the detection that real-time data of power grid is carried out, is conducive to deleting invalid real-time data of power grid, improves the correctness of subsequent treatment.
In this step, the qualified real-time data of power grid of detection is averaging processing and extracts effective real time data, be specially, be averaged to calculate to N group data and extract effective real time data and calculate and the Data Source of control analysis as the whole network, do like this, can ensure that the foundation calculated is relatively steady, stop the impact of accidental data.The value of N can be determined on a case-by-case basis, as the frequency acquisition of real-time data of power grid, the quantity etc. of the whole network covering electric substation.In present embodiment, for ensureing effective real time data frequency of occurrences, 3≤N≤10 are set.
S3, computational analysis is carried out to effective real time data, obtain and be no less than one and regulate by capacitor switching or transformer gear the control strategy realizing regional pre-determined network reactive power/voltage control target, and generate control strategy set.
Area power grid reactive power/voltage control target obtains by communication, and such as superior system is assigned to lower system, also manually arranges according to actual conditions by staff.
In this step, effective real time data of trunk net corresponding to the area power grid needing to realize reactive power/voltage control target is analyzed, calculate power factor of electric network, primary substation be idle, the reactive power compensation redundancy K of the capacitor of each substation busbars voltage and each electric substation and capacitor switching coefficient M, and the M value of each capacitor is ranked with clear and definite switching order, judge the whole network each electric substation state.Then, formulate all control strategies realizing reactive power/voltage control target for trunk net, the content of control strategy for carrying out switching operation to capacitor or transformer carries out gear adjustment, and by all control strategy formation control strategy sets.So, using trunk net as handling object, analyzed by the mode of each node in traversal trunk net, level is strong, can avoid omission or the repetition of Data processing, improves accuracy.
S4, in conjunction with power network topology network, analyze each control strategy implement after the whole network running status, ensureing to select under the prerequisite that the whole network voltage is qualified to capacitor or the minimum optimal control policy of transformer operating step.
Concrete, after implementing each control strategy, the whole network running status is analyzed, thus is ensureing to select under the prerequisite that the whole network voltage is qualified to capacitor or the minimum control strategy of transformer operating step as optimal control policy.
S5, optimal control policy to be judged; When optimal control policy is correct, carry out storage backup, and generate electrical network remote control command according to optimal control policy, when optimal control policy is incorrect, return step S3.
In this step, judge that the standard of optimal control policy correctness is: grid equipment whether can be caused abnormal, whether exceed number of operations restriction, whether exceed operating time interval, whether can realize electric network reactive-load voltage control target.
S6, regulate the capacitor switching state or transformer gear of specifying according to electrical network remote control command, after realizing area power grid reactive power/voltage control target, return step S2.
Below in conjunction with concrete area power grid reactive voltage control system, area power grid reactive voltage control method provided by the invention is further explained.
With reference to Fig. 2, a kind of area power grid reactive voltage control system that the present invention proposes, directly can connect the existing SCADA system of electrical network (Supervisory Control And Data Acquisition, data acquisition and supervisor control), and utilize the data acquisition and control of SCADA system realization to electrical network, make full use of existing grid equipment, the system of saving sets up cost, reduces difficulty of construction.
This area's electric network reactive-load voltage control system comprises topological network and sets up module, data collection and analysis module, idle instruction input module, reactive voltage analysis module, controls output module and memory module.Wherein, module connection data collection analysis module and reactive voltage analysis module respectively set up by topological network, data collection and analysis module is all connected memory module with reactive voltage analysis module, idle instruction input module connects reactive voltage analysis module, reactive voltage analysis module connection control output module.
Idle instruction input module connects reactive voltage analysis module, the reactive power/voltage control target instruction target word waiting and send is adjusted as economized for receiving higher level's dispatching patcher, or staff inputs reactive power/voltage control target instruction target word, so that reactive voltage analysis module obtains area power grid reactive power/voltage control target.
Utilize this system to realize area power grid reactive voltage control method provided by the invention, step is as follows:
S1, topological network are set up module and are set up trunk net according to regional electric network model with once becoming root node and becoming child node with secondary in area power grid, and generate power network topology network according to multiple trunk net.So power network topology network is and area power grid topological structure one to one.
S2, data collection and analysis module travel through each child node and gather real-time data of power grid from SCADA system in the trunk net that area power grid is corresponding, and the qualified data of detection acquisition are carried out to real-time data of power grid, by combining lattice data averaged to N to obtain effective real time data, and by effective real-time data memory to memory module.
Real-time data of power grid comprises: the on off state of electric substations at different levels main transformer and capacitor, disconnecting link state; The current gear of electric substations at different levels transformer; Meritorious, idle, the voltage of electric substation at different levels; Relay protection signal.Relay protection signal comprises: capacitor faults signal and main transformer fault-signal.Real-time data of power grid is the foundation judged electric network state.
Data collection and analysis module comprises the data validation of message correctness School Affairs to the detection that real-time data of power grid is carried out.
The verification of message correctness comprises: whether synchronization character is complete, whether frame length is correct, whether CRC (Cyclic Redundancy Check, cyclic redundancy check (CRC) code) verification is passed through.
Data validation comprises: the judgement of correct data scope, the judgement of comprehensive remote signalling amount state.For voltage content, often sometimes because reasons such as power failure, maintenance, cause the remote measurement value of transmission abnormal, and now, concerning capture program, belong to normal condition, when this happens, locking relevant device or arrange corresponding power transformation and to do exit status, no longer carries out computation and analysis to it; And other parts of the whole network, still normally run, unaffected.So, can determine that the content that transmitting terminal sends is genuine and believable and can adopts, to ensure that system can not do because of real-time data of power grid collection mistake the judgement made mistake.
Data collection and analysis module does not directly adopt the qualified data in the real-time data of power grid received, but be averaged to calculate to N group data and extract effective real time data and calculate and the Data Source of control analysis as the whole network, do like this, can ensure that the data of participating in calculating are relatively steady, stop the impact of accidental data.The value of N can be determined on a case-by-case basis, as the frequency acquisition of real-time data of power grid, the quantity etc. of the whole network covering electric substation.The value of N is larger, and effective real time data representativeness of acquisition is higher, but the amount of calculation of considering, and effective real-time data acquisition frequency, the span of N can be preferably 3≤N≤10.
Data collection and analysis module, in conjunction with network topology structure, carries out detection and control by the mode of traverse node to the whole network, is beneficial to the preciseness improving the whole network and control, avoids error.
S3-S5, reactive voltage analysis module are analyzed effective real time data, calculate the whole network power factor, primary substation be idle, the reactive power compensation redundancy K of the capacitor of each substation busbars voltage and each electric substation and capacitor switching coefficient M, rank with clear and definite switching order to M value, and select optimal control policy to generate electrical network remote control command in conjunction with power network topology network, and electrical network remote control command is stored into memory module.Electrical network remote control command comprises: upshift or the downshift of the operation of the switching of capacitor and/or on-load tap-changing transformer gear regulate.
Particularly, reactive voltage analysis module travels through child node and calculates the service data such as the power factor of area power grid, primary substation is idle, the reactive power compensation redundancy K of the capacitor of each substation busbars voltage and each electric substation and capacitor switching coefficient M according to effective real time data in trunk net, the M value of each capacitor is ranked with clear and definite switching sequentially.Reactive voltage analysis module is in conjunction with regional operation of power networks data and area power grid reactive power/voltage control target, analyze to obtain and can realize all control strategies of this target, the measure of control strategy comprises to be carried out switching operation to capacitor and/or has carrying a transformer and carrying out gear pressure regulation.All control strategies of the corresponding same trunk net of reactive voltage analysis module set generate control strategy set, then comprehensively analyze by carrying out area power grid in conjunction with power network topology network, namely calculate the whole network power factor according to the effective real time data of the whole network, primary substation be idle, the reactive power compensation redundancy K etc. of the capacitor of each substation busbars voltage and each electric substation, correction judgement is carried out to it ensureing to select under the prerequisite that the whole network voltage is qualified the minimum control strategy of operating procedure as optimal control policy.When optimal control policy is correct, reactive voltage analysis module generates electrical network remote control command according to optimal control policy.
Optimal control policy refers to the strategy that most advantages of simple, the step that can realize electric network reactive-load voltage control target is minimum, and its perfect condition is, only once controls just to realize area power grid reactive power/voltage control target to a capacitor or transformer.
Whether reactive voltage analysis module judges that the standard of optimal control policy correctness is: grid equipment can be caused abnormal, whether exceeds number of operations restriction, whether exceeds operating time interval, whether can realize the voltage-controlled target of electric network reactive-load.
The calculating of M value has considered energy-saving effect, the compensation effect of capacitor switching and the impact on busbar voltage.M value is larger, and the energy-conservation and voltage effect of input is better; M value is less, and the energy-conservation and voltage effect of input is poorer.The M value of capacitor ranked, specify the switching order of each capacitor, very intuitively, the analysis being conducive to reactive voltage analysis module judges.
Electrical network remote control command is transported to SCADA system and realizes area power grid reactive power/voltage control target with the capacitor switching state of being specified by adjustment or transformer gear by S6, control output module.。
After electrical network remote control command is performed, data collection and analysis module carries out the gather and analysis process of a new round to the whole network real time data, reactive voltage analysis module is monitored the whole network running status according to effective real time data, can inquire about and add up according to preset time period to primary substation, secondary substation and the whole network network loss situation.
The above; be only the present invention's preferably embodiment; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (10)
1. an area power grid reactive voltage control method, it is characterized in that, electric network model is utilized to set up the topological network covering each electric substation of the whole network, by Real-time Collection real-time data of power grid, the whole network is monitored, and ensureing to be optimized control to area power grid under the prerequisite that the whole network voltage is qualified by capacitor switching and transformer gear adjustment according to reactive power/voltage control target; Said method comprising the steps of:
The power network topology network of S1, the foundation covering each electric substation of the whole network;
The real-time data of power grid of S2, Real-time Collection area power grid also detects, and the qualified real-time data of power grid of detection is carried out analyzing and processing and extracts effective real time data;
S3, computational analysis is carried out to effective real time data, obtain and be no less than one and regulate by capacitor switching or transformer gear the control strategy realizing predetermined area power grid reactive power/voltage control target, and generate control strategy set;
S4, in conjunction with power network topology network, analyze each control strategy implement after the whole network running status, ensureing to select under the prerequisite that the whole network voltage is qualified to capacitor or the minimum optimal control policy of transformer operating step;
S5, optimal control policy to be judged; When optimal control policy is correct, generates electrical network remote control command, when optimal control policy is incorrect, return step S3;
S6, regulate the capacitor switching state or transformer gear of specifying according to electrical network remote control command, after realizing reactive power/voltage control target, return step S2.
2. area power grid reactive voltage control method as claimed in claim 1, it is characterized in that, step S1 is specially: to do root node be that child node is set up and is no less than a trunk net with secondary substation with local one time power transformation, generate power network topology network in conjunction with all trunk nets of the whole network.
3. area power grid reactive voltage control method as claimed in claim 2, it is characterized in that, step S2 is specially: in the trunk net that area power grid is corresponding, travel through each child node gather real-time data of power grid and detect, the qualified real-time data of power grid of detection is averaging processing and extracts effective real time data, and by effective real time data back-up storage.
4. area power grid reactive voltage control method as claimed in claim 3, is characterized in that, comprise the data validation of message correctness School Affairs in step S2 to the detection of real-time data of power grid.
5. area power grid reactive voltage control method as claimed in claim 3, it is characterized in that, the real-time data of power grid gathered in step S2 comprises: the on off state of electric substations at different levels main transformer and capacitor, disconnecting link state; The current gear of electric substations at different levels transformer; Meritorious, idle, the voltage of electric substation at different levels; Relay protection signal.
6. area power grid reactive voltage control method as claimed in claim 5, it is characterized in that, relay protection signal comprises: capacitor faults signal and main transformer fault-signal.
7. area power grid reactive voltage control method as claimed in claim 1, it is characterized in that, step S3 is specially: analyze effective real time data, calculate power factor of electric network, primary substation is idle, the reactive power compensation redundancy K of the capacitor of each substation busbars voltage and each electric substation and capacitor switching coefficient M, and rank with clear and definite switching order to the M value of each capacitor, analysis acquisition is no less than one and regulates with the control strategy realizing area power grid reactive power/voltage control target by capacitor switching or transformer gear, and generate control strategy set.
8. area power grid reactive voltage control method as claimed in claim 1, is characterized in that, in step S3, area power grid reactive power/voltage control target is obtained by communication or manually arranges.
9. area power grid reactive voltage control method as claimed in claim 1, it is characterized in that, whether in step S5, the standard of optimal control policy correctness is: grid equipment can be caused abnormal, whether exceed number of operations restriction, whether exceed operating time interval, whether can realize electric network reactive-load voltage control target.
10. the area power grid reactive voltage control method as described in any one of claim 1 to 8, is characterized in that, in step S5, when optimal control policy is correct, by its back-up storage, and generates electrical network remote control command.
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| CN106329540A (en) * | 2016-10-09 | 2017-01-11 | 国网上海市电力公司 | Reactive voltage control system for light-load period of power grid |
| CN110808634A (en) * | 2019-11-06 | 2020-02-18 | 国网安徽省电力有限公司安庆供电公司 | Reactive numerical value abnormity detection system |
| CN113162056A (en) * | 2021-03-22 | 2021-07-23 | 华北电力科学研究院有限责任公司 | Automatic voltage control method and device for extra-high voltage power grid |
| CN118487383A (en) * | 2024-07-11 | 2024-08-13 | 云瑞科技（天津）有限公司 | Substation security policy management method and management system |
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| CN106329540A (en) * | 2016-10-09 | 2017-01-11 | 国网上海市电力公司 | Reactive voltage control system for light-load period of power grid |
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| CN113162056A (en) * | 2021-03-22 | 2021-07-23 | 华北电力科学研究院有限责任公司 | Automatic voltage control method and device for extra-high voltage power grid |
| CN118487383A (en) * | 2024-07-11 | 2024-08-13 | 云瑞科技（天津）有限公司 | Substation security policy management method and management system |
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| CN104319779B (en) | 2017-02-15 |
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