CN102882218B - Static centralized and dynamic distributed coordination control system for reactive power/voltage of distribution network - Google Patents
Static centralized and dynamic distributed coordination control system for reactive power/voltage of distribution network Download PDFInfo
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- CN102882218B CN102882218B CN201210405655.8A CN201210405655A CN102882218B CN 102882218 B CN102882218 B CN 102882218B CN 201210405655 A CN201210405655 A CN 201210405655A CN 102882218 B CN102882218 B CN 102882218B
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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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- 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
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/22—Flexible AC transmission systems [FACTS] or power factor or reactive power compensating or correcting units
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
Abstract
The invention relates to a static centralized and dynamic distributed coordination control system for the reactive power/voltage of a distribution network. The system comprises a static reactive power centralized optimization control subsystem and dynamic voltage distributed control subsystems. On a centralized dispatching side, the static reactive power centralized optimization control subsystem determines a switching strategy for capacitor banks according to requirements on limitation on the switching times of the capacitor banks and changes in a load, controls the capacitor banks, simultaneously detects whether dynamic voltage distributed control succeeds or not, and starts a dynamic voltage centralized control strategy if the dynamic voltage distributed control fails; and the dynamic voltage distributed control subsystems automatically regulate dynamic reactive power compensation devices and transformer tapping joints according to local measured data and the fluctuations of the load and the voltage, and simultaneously detect whether static reactive power centralized optimization control succeeds or not to start a static reactive power distributed control strategy. Compared with the prior art, the system has the advantage that the advantages of centralized and distributed control are fully utilized.
Description
Technical field
The present invention relates to a kind of power distribution network relevant control technology, especially relate in a kind of static set of power distribution network REACTIVE POWER/VOLTAGE and DYNAMIC DISTRIBUTION coordinated control system.
Background technology
In power distribution network running, the reasonable control of REACTIVE POWER/VOLTAGE and adjustment are vital for reducing grid loss, improving the quality of power supply.For power distribution network, the means of reactive power/voltage control and adjustment are relative less, take capacitor group, load tap changer as main, owing to being subject to the restriction of cost of investment, and dynamic reactive compensation device, as less in configurations such as SVC.
In power distribution network REACTIVE POWER/VOLTAGE static set, coordinate to control with DYNAMIC DISTRIBUTION the content that comprises two aspects: the distribution on the spot of the concentrated optimal control of static passive compensation device (capacitor group) and dynamic reactive compensation device (as SVC etc., comprise load tap changer) is controlled.For the power distribution network that there is no dynamic reactive compensation device (as SVC) etc., distribute on the spot to control and mainly for load tap changer, carry out.In addition, when concentrated optimal control goes wrong, on the spot distribution control mode can be used as concentrate optimal control standby, also static passive compensation device is controlled; Vice versa.That is to say, it is mutually standby concentrating with the control that distributes.
Through the retrieval of prior art document is found, the mode of existing power distribution network REACTIVE POWER/VOLTAGE CONTROL and adjustment is divided into two kinds.Being a mode of controlling on the spot, with regard to VQC, controlling, is generally to form control strategy according to nine territory figure, the tap of transformer and local capacitor group is controlled, in order to keep the in-situ balancing of reactive power.Because there is certain defect in nine territory figure control strategies, nine territory figure had been proposed successively again afterwards to improve, or even the control mode of 17 territory figure, as the synchronizing calculation method > > (Automation of Electric Systems of document < < transforming plant voltage reactive control range, 2003, 27 (8): 70-74.), < < transforming plant voltage reactive control strategy and implementation > > (Automation of Electric Systems, 2001, 25 (15): 47-50.), the new discussion of < < VQC control principle--by " nine district figure " to " five district figure " > > (Automation of Electric Systems, 2004, 28 (19): 92-95.), the research > > (China Power of < < electric substation's voltage and Reactive Power Automatic Regulating Criteria, 1995, 28 (7): 12-15).In general, the capacity of capacitor group can not be by large-scale smooth adjustment, so cause under a lot of operational modes, reactive power is impossible in-situ balancing, therefore also just has horizontal and vertical support issue idle between different substation.From this angle, the limitation of controlling on the spot displays, because be not to consider a problem from overall angle, the effect of optimization is relatively poor.In addition, owing to there is certain limitation in the action frequency of electric equipment, capacitor group often can not be by switching frequently, and for the larger situation of localised load fluctuation, certainly will cause VQC (voltage power-less control) control system start frequently and operate, this is also one of major defect of Partial controll.Another kind is central controlled mode, be that AVC (automatism voltage control) controls, in scheduling or main website side unification, capacitor group and load tap changer are controlled, as the research of document < < Jiangsu Power Grid AVC main station system with realize > > (Automation of Electric Systems, 2004, 29 (22): 83～87.), < < Anhui Power Grid automatism voltage control (AVC) system and realize > > (Automation of Electric Systems, 2004, 28 (8): 20～22.), but due to Distribution Network Equipment parameter, measurement data, and the error of the computational efficiency aspect of optimized algorithm existence itself, formed decision scheme is often difficult to carry out.
Summary of the invention
Object of the present invention is exactly in order to overcome the defect that above-mentioned prior art exists, to provide in a kind of static set of power distribution network REACTIVE POWER/VOLTAGE and DYNAMIC DISTRIBUTION coordinated control system.
Object of the present invention can be achieved through the following technical solutions:
In the static set of power distribution network REACTIVE POWER/VOLTAGE, with a DYNAMIC DISTRIBUTION coordinated control system, it is characterized in that, comprise the concentrated optimal control subsystem of static reactive and dynamic electric voltage distribution control subsystem;
In centralized dispatching side, static reactive concentrates optimal control subsystem according to the switching frequency restriction requirement of capacitor group, and the Switching Strategy of capacitor group is determined in the variation of load, and carry out the control of capacitor group, whether detect dynamic electric voltage distribution controls successful simultaneously, if unsuccessful, start the central controlled strategy of dynamic electric voltage;
Dynamic electric voltage distribution control subsystem is according to local measurement data, and the fluctuation of load and voltage, automatically adjust dynamic reactive compensation device and load tap changer, detect static reactive simultaneously and concentrate the success or not of optimal control to start static reactive distribution control strategy.
Described static reactive concentrates that optimal control subsystem comprises data acquisition module, state estimation module, load prediction module, topological analysis module, idle work optimization module, expert system is idle in-situ balancing analysis module and main website coordinating control module;
Data acquisition module is sent the data of collection into state estimation module, state estimation module is missed after the cleaning of data and the estimation of electric equipment parameter, data are exported respectively and are sent to load prediction module and topological analysis module, load prediction module distributes and predicts short term, topological analysis module realizes topological dynamic coloring simultaneously, and uncharged part is removed, form the needed network topology data of computational analysis, data after load prediction module and topological analysis resume module output to idle work optimization module, idle work optimization module is according to the switching frequency restriction of the result of above-mentioned load prediction and capacitor group, on peak and low-valley interval, carry out the concentrated idle work optimization of the whole network respectively, and whether judgement is optimized successful, if while optimizing unsuccessfully, expert system in-situ balancing analysis module is according to the rule base of expert system, automatically form the control strategy of capacitor group, simultaneously according to the Monitoring Data of dispatch automated system, when load peaks or during low ebb, above-mentioned strategy is controlled capacitor group in real time by communication channel, main website coordinating control module monitors by dispatch automated system the effect that dynamic electric voltage distributes and controls, and when dynamic electric voltage distribution control cannot realize, by the mode sending instructions under main website, dynamic reactive compensation device and load tap changer is carried out to centralized control.
Described state estimation module is specially the estimation of electric equipment parameter:
According to the metric data of SCADA and the unbalanced degree of electric equipment two ends trend, according to the mode of sensitivity analysis, electric equipment parameter has been carried out to Estimation and rectification, described electric equipment parameter comprises impedance, admittance and transformer voltage ratio.
Described load prediction module distributes and predict and be specially short term: employing similarity technology, in historical data, select to be weighted matching with the load curve that similarity reached set point when the day before yesterday, thereby form the load curve when the day before yesterday, and predict and determine the period that load peak and low ebb are occurred.
Described idle work optimization module is taked gradient optimal method, usings the capacity of each capacitor group as the state variable of optimizing.
Described topological analysis module has been taked two-layer equipment chained list, the connection relational table that ground floor equipment chained list is electric equipment, and second layer chained list is the connection relational table of having considered after electric equipment attribute data.
Described main website coordinating control module, when find substation voltage distribute on the spot control long-time when invalid, take dynamic electric voltage centralized control strategy, Ji main website side, by SCADA system, the load tap changer of each transformer station and dynamic reactive compensation device are controlled.
Described dynamic electric voltage distribution control subsystem comprises control strategy generation module and substation coordinating control module;
Control strategy generation module, according to the node voltage of in-site collecting and power factor (PF) parameter, is being set in the period, according to " improving nine territory figure ", realizes controlling in real time on the spot of dynamic reactive compensation device and load tap changer; Substation coordinating control module monitors the operating state of dispatch automated system, when communication channel is not smooth, Static Electro container group is taked to the mode that distributes on the spot and control.
Described improvement nine territory figure compare with nine territory figure of routine, and its abscissa has been taked idle departure.
Compared with prior art, the present invention has the following advantages:
In the present invention, considered error and the interference of the aspects such as measuring system, calculating, to take Static Electro container group aspect optimization be object concentrating, and because the capacity of capacitor group is larger, can realize idle in a basic balance; Otherwise to take the data that this locality gathers be foundation because control on the spot, not only the accuracy of data is high, and the algorithm of " improving nine territory figure " is simple, can accurately control for no-power vacancy.So just can make full use of the advantage of concentrating and distributing and control.
Accompanying drawing explanation
Fig. 1 is the structural representation of system of the present invention;
Fig. 2 is the schematic diagram that static reactive is concentrated optimal control subsystem;
Fig. 3 is the schematic diagram of dynamic electric voltage distribution control subsystem;
Fig. 4 improves the basic principle figure of nine territory figure.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
The present embodiment relates to two subsystems, and one is that static reactive is concentrated optimal control subsystem, is installed in control centre or concentrator station; One is dynamic electric voltage distribution control subsystem, is installed on each transformer station inner.Reactive power compensator, comprises that static capacitor group, dynamic SVC and load tap changer are all distributed in transformer station inside.
As shown in Figure 1, the present embodiment is connected with the SCADA system of control centre, and SCADA system, as communication and the data platform of the present embodiment, concentrates the coordination distributing with dynamic electric voltage to control thereby realize static reactive.Described SCADA system realizes " remote control, remote measurement, remote regulating, the remote signalling " to electrical network, is disposed at widely in the middle of the electrical network of each electric pressure, particularly for the above electrical network of 35kV.
As shown in Figure 2, the static reactive of the present embodiment concentrates optimal control subsystem to comprise: state estimation module, load prediction module, topological analysis module, idle work optimization module, expert system is idle in-situ balancing analysis module and main website coordinating control module.Data acquisition module is sent the data of collection into state estimation module, state estimation module realizes the mistake cleaning of data and the estimation of electric equipment parameter, guarantee to calculate the precision of required data, the output of state estimation module is sent to respectively load prediction module and topological analysis module, load prediction module realizes short term forecast of distribution, adopt similarity technology, in historical data, select with when the day before yesterday closely similar load curve be weighted matching, thereby form the load curve when the day before yesterday, and the period that load peak and low ebb are occurred predict and determine, topological analysis module realizes topological dynamic coloring, and uncharged part is removed, and forms the needed network topology data of computational analysis, data after load prediction module and topological analysis resume module output to idle work optimization module, idle work optimization module is according to the switching frequency restriction of the result of above-mentioned load prediction and capacitor group, on peak and low-valley interval, carry out the concentrated idle work optimization of the whole network respectively, take gradient optimal method, using the capacity of each capacitor group as the state variable of optimizing, the decision-making foundation of taking respectively " state variable optimum results >=60% capacity of capacitor bank " " to cut " as capacitor group as decision-making foundation and " state variable optimum results <=40% capacity of capacitor bank " of capacitor group " throwing ".When optimizing unsuccessfully, expert system in-situ balancing analysis module, according to the rule base of expert system, forms the control strategy of capacitor group automatically.Meanwhile, according to the Monitoring Data of dispatch automated system, when load peaks or during low ebb, above-mentioned strategy controlled capacitor group in real time by communication channel.Main website coordinating control module monitors by dispatch automated system the effect that dynamic electric voltage distributes and controls, and when dynamic electric voltage distribution control cannot realize, by the mode sending instructions under main website, dynamic reactive compensation device and load tap changer is carried out to centralized control.
1, described state estimation module, comprises following a few partial content.1. vacancy value: for the disappearance of measurement data, adopt the data of the adjacent time interval data that fill up the vacancy; 2. miss data: adopt whether the data that mutually relatively judge of adjacent 5 some data are misdata, if all data differences are little, think that measurement data is correct data, otherwise think mistake data.Mistake data are first disallowable, then as vacancy data processing; 3. noise data: owing to being subject to the impact of measurement mechanism precision, any data all comprise noise, and noise data takes the weighted average of multiple spot (5 points) data to process; 4. parameter Estimation: for the parameter of electric equipment, the data that producer provides are due to the impact that is subject to conditions for equipment use certain error of existence more or less all.According to SCADA system measurements data, according to power flow equation, the parameter of electric equipment is analyzed, adjusted and estimates.
2, described load prediction module, adopt similarity technology, according to characteristic features such as season, meteorological condition, festivals or holidays, load levels, according to the most close load curve is as the load curve when the day before yesterday in historical data with load, the index of wherein weighing close degree adopts the Euclidean distance of characteristic feature.
3, described topological analysis module, adopts two-layer equipment chained list, first forms the connection relational table of electric equipment as the equipment chained list of ground floor; Then by the attribute data of equipment, as corresponding with the electric equipment in ground floor chained list as second layer chained list in impedance, admittance and transformer voltage ratio etc.Ground floor equipment chained list is used for carrying out the annexation analysis of equipment; And the equipment chained list of the second layer is used for carrying out analytical calculation.
4, described idle work optimization module, adopts gradient optimal method, first the optimization problem without inequality constraints is solved.When node voltage inequality constraints does not meet, carry out node type conversion, the mode that PQ (load) node is converted to PV (generator) node is processed inequality constraints.
5, described expert system analysis of reactive power balance module on the spot, according to the principle of load bus load or burden without work and reactive compensation capacity difference minimum, determine whether switching of capacitor group, consider the switching frequency restriction of capacitor group and peak and the low-valley interval of load curve simultaneously.As a same reason, according to the height of node voltage amplitude, determine the adjustment strategy of load tap changer and dynamic reactive compensation device.
6, described main website coordinating control module, by the communication channel of SCADA, detect the effect that voltage distributes on the spot and controls, when voltage distribute on the spot control long-time when invalid, from main website side, in a centralized fashion each substation transformer tap and dynamic reactive compensation device are adjusted.
As shown in Figure 3, described dynamic electric voltage distribution control subsystem comprises control strategy generation module and substation coordinating control module.Control strategy generation module, according to parameters such as the node voltage of in-site collecting and power factor (PF)s, within the shorter period, is realized controlling in real time on the spot of dynamic reactive compensation device and load tap changer according to " improving nine territory figure "; Substation coordinating control module monitors the operating state of dispatch automated system, when communication channel is not smooth, Static Electro container group is taked to the mode that distributes on the spot and control.
1, described control strategy generation module, makes to generate control strategy according to " improved nine territory figure ", " improved nine territory figure " as shown in Figure 4.Compare with nine territory figure of routine, its abscissa has been taked idle departure:
ΔQ＝Q-Q
0
Wherein: Δ Q is load or burden without work; Q
0for the determined compensation rate of static reactive centralized control.That is to say, voltage distributes on the spot to control and carries out on idle central controlled basis.
2, described substation coordinating control module, first detect the central controlled effect of static reactive, when the idle centralized control of discovery is long-time or communication channel is not smooth, according to nine territory figure of routine, unifies to form the control of capacitor group, load tap changer (comprising dynamic reactive compensation device) and adjust strategy.
Claims (8)
- In the static set of power distribution network REACTIVE POWER/VOLTAGE with a DYNAMIC DISTRIBUTION coordinated control system, it is characterized in that, comprise that static reactive concentrates optimal control subsystem and dynamic electric voltage distribution control subsystem;In centralized dispatching side, static reactive concentrates optimal control subsystem according to the switching frequency restriction requirement of capacitor group, and the Switching Strategy of capacitor group is determined in the variation of load, and carry out the control of capacitor group, whether detect dynamic electric voltage distribution controls successful simultaneously, if unsuccessful, start the central controlled strategy of dynamic electric voltage;Dynamic electric voltage distribution control subsystem is according to local measurement data, and the fluctuation of load and voltage, automatically adjust dynamic reactive compensation device and load tap changer, detect static reactive simultaneously and concentrate the success or not of optimal control to start static reactive distribution control strategy;Described static reactive concentrates that optimal control subsystem comprises data acquisition module, state estimation module, load prediction module, topological analysis module, idle work optimization module, expert system is idle in-situ balancing analysis module and main website coordinating control module;Data acquisition module is sent the data of collection into state estimation module, state estimation module is missed after the cleaning of data and the estimation of electric equipment parameter, data are exported respectively and are sent to load prediction module and topological analysis module, load prediction module distributes and predicts short term, topological analysis module realizes topological dynamic coloring simultaneously, and uncharged part is removed, form the needed network topology data of computational analysis, data after load prediction module and topological analysis resume module output to idle work optimization module, idle work optimization module is according to the switching frequency restriction of the result of above-mentioned load prediction and capacitor group, on peak and low-valley interval, carry out the concentrated idle work optimization of the whole network respectively, and whether judgement is optimized successful, if while optimizing unsuccessfully, expert system in-situ balancing analysis module is according to the rule base of expert system, automatically form the control strategy of capacitor group, simultaneously according to the Monitoring Data of dispatch automated system, when load peaks or during low ebb, above-mentioned strategy is controlled capacitor group in real time by communication channel, main website coordinating control module monitors by dispatch automated system the effect that dynamic electric voltage distributes and controls, and when dynamic electric voltage distribution control cannot realize, by the mode sending instructions under main website, dynamic reactive compensation device and load tap changer is carried out to centralized control.
- In the static set of a kind of power distribution network REACTIVE POWER/VOLTAGE according to claim 1 with DYNAMIC DISTRIBUTION coordinated control system, it is characterized in that, described state estimation module is specially the estimation of electric equipment parameter:According to the metric data of SCADA and the unbalanced degree of electric equipment two ends trend, according to the mode of sensitivity analysis, electric equipment parameter has been carried out to Estimation and rectification, described electric equipment parameter comprises impedance, admittance and transformer voltage ratio.
- In the static set of a kind of power distribution network REACTIVE POWER/VOLTAGE according to claim 1 with DYNAMIC DISTRIBUTION coordinated control system, it is characterized in that, described load prediction module distributes and predict and be specially short term: employing similarity technology, in historical data, select to be weighted matching with the load curve that similarity reached set point when the day before yesterday, thereby form the load curve when the day before yesterday, and predict and determine the period that load peak and low ebb are occurred.
- In the static set of a kind of power distribution network REACTIVE POWER/VOLTAGE according to claim 1 with DYNAMIC DISTRIBUTION coordinated control system, it is characterized in that, described idle work optimization module is taked gradient optimal method, usings the capacity of each capacitor group as the state variable of optimizing.
- In the static set of a kind of power distribution network REACTIVE POWER/VOLTAGE according to claim 1 with DYNAMIC DISTRIBUTION coordinated control system, it is characterized in that, described topological analysis module has been taked two-layer equipment chained list, the connection relational table that ground floor equipment chained list is electric equipment, and second layer chained list is the connection relational table of having considered after electric equipment attribute data.
- In the static set of a kind of power distribution network REACTIVE POWER/VOLTAGE according to claim 1 with DYNAMIC DISTRIBUTION coordinated control system, it is characterized in that, described main website coordinating control module, when find substation voltage distribute on the spot control long-time when invalid, take dynamic electric voltage centralized control strategy, Ji main website side, by SCADA system, the load tap changer of each transformer station and dynamic reactive compensation device are controlled.
- In the static set of a kind of power distribution network REACTIVE POWER/VOLTAGE according to claim 1 with DYNAMIC DISTRIBUTION coordinated control system, it is characterized in that, described dynamic electric voltage distribution control subsystem comprises control strategy generation module and substation coordinating control module;Control strategy generation module, according to the node voltage of in-site collecting and power factor (PF) parameter, is being set in the period, according to " improving nine territory figure ", realizes controlling in real time on the spot of dynamic reactive compensation device and load tap changer; Substation coordinating control module monitors the operating state of dispatch automated system, when communication channel is not smooth, Static Electro container group is taked to the mode that distributes on the spot and control.
- In the static set of a kind of power distribution network REACTIVE POWER/VOLTAGE according to claim 7 with DYNAMIC DISTRIBUTION coordinated control system, it is characterized in that, described improvement nine territory figure compare with nine territory figure of routine, its abscissa has been taked idle departure.
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| CN105182116B (en) * | 2015-08-26 | 2018-08-14 | 云南电网有限责任公司电力科学研究院 | A kind of transformer winding working state detecting method based on weighted gradient structural similarity |
| CN106353625B (en) * | 2016-11-02 | 2019-06-11 | 广东电网有限责任公司佛山供电局 | The voltage power-less regulating effect detection method and system of substation |
| CN106451473B (en) * | 2016-11-03 | 2019-08-20 | 成都信息工程大学 | Power distribution network multiple target voltage control method based on fuzzy multiple agent |
| CN106816871B (en) * | 2017-01-24 | 2020-03-27 | 中国电力科学研究院 | State similarity analysis method for power system |
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| CN110518575B (en) * | 2019-08-02 | 2022-09-16 | 南京理工大学 | Multi-time scale active power distribution network voltage optimization control method based on region division |
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