CN105576660A - Region power distribution network on-line simulation analysis device and system - Google Patents
Region power distribution network on-line simulation analysis device and system Download PDFInfo
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- CN105576660A CN105576660A CN201610124593.1A CN201610124593A CN105576660A CN 105576660 A CN105576660 A CN 105576660A CN 201610124593 A CN201610124593 A CN 201610124593A CN 105576660 A CN105576660 A CN 105576660A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/30—Circuit design
- G06F30/36—Circuit design at the analogue level
- G06F30/367—Design verification, e.g. using simulation, simulation program with integrated circuit emphasis [SPICE], direct methods or relaxation methods
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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
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
Abstract
The invention discloses a region power distribution network on-line simulation analysis device and system. The device comprises a main distribution network modeling unit for establishing a main distribution network integrated module according to main grid data and power distribution network data; a tie switch selection unit for selecting two loop closing lines for loop closing operation in a power distribution network and tie switches; a topology forming unit for forming a topological relation of loop closing contact lines according to the loop closing lines and the tie switches; a parameter input unit for inputting parameters of the power grid; a loop closing point selection unit for selecting loop closing points according to the parameters; a load flow calculation unit for calculating load flow distribution of the two sides of a loop closing switch of the loop closing points according to the topological relation of loop closing contact lines and the load flow data; a loop closing current calculation unit for calculating loop closing surge current and steady-state current according to the load flow distribution; and a judgment and reminding unit for comparing the loop closing surge current and steady-state current calculating result with loop closing conditions, and giving reminding information for whether to carry out loop closing operation. The device and system allow the power distribution network to be good in operation safety and high in reliability.
Description
Technical field
The present invention relates to system for distribution network of power field, particularly a kind of local distribution network in-circuit emulation analytical equipment and system.
Background technology
Constantly perfect along with modern power systems electric network composition, operation power mode increases day by day, for improving operation of power networks section reliability further, reduce network loss, improve carrying load ability and the utilization ratio of network, make to supply ability stronger mutually, in current power system, establish a large amount of looped networks, make distribution network can meet the needs of various operational mode.
When power distribution network carries out Loop Closing Operation, both sides power supply is generally in split operation state, usually because of the existence of cyclization point switch two side bus or line electricity pressure reduction, such that the circulation that produces in Loop Closing Operation is excessive causes over-current protection malfunction.
In order to ensure the uninterrupted power supply of responsible consumer, understand the situation of change of distribution trend, avoid unnecessary overload or contingency, involutive ring electric current is needed to carry out detailed analysis and calculation, this contributes to operations staff and carries out suitable adjustment to the operational mode of regional electric power networks, thus guarantee user benefit, reduce loss of outage.
China's Urban Medium Voltage Distribution Network extensively adopts the supply power mode of closed loop design, open loop operation, namely has the dual power supply even structure of multiple feed, which increases the flexibility of power supply, also provides primary condition for allowing to perform Loop Closing Operation.Therefore, when certain bus, switch, feeder line or relevant secondary become needs maintenance time, by Loop Closing Operation, the load on this bus, switch or feeder line is not transferred on other buses be attached thereto or feeder line with not having a power failure, can power supply reliability be improved.But in some cases, if perform Loop Closing Operation can produce larger Alloy White Iron, thus protective device malfunction or super equipment rated value may be caused, have influence on the safe and reliable operation of power distribution network.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency existing in prior art, a kind of power distribution network safety in operation is good, reliability is high local distribution network in-circuit emulation analytical equipment and system are provided.
In order to realize foregoing invention object, the technical solution used in the present invention is:
A kind of local distribution network in-circuit emulation analytical equipment, comprising:
Main distribution modeling unit, for the main electric network data that basis is derived by EMS system, the power distribution network data derived by PMS system, set up main distribution Integrated Model; Described main distribution Integrated Model at least comprises the network topology of main electrical network;
Interconnection switch selected cell, needs to carry out two cyclization circuits of Loop Closing Operation and the interconnection switch of correspondence for selecting in power distribution network;
Topology formation unit, for forming the topological relation of cyclization interconnector according to the described cyclization circuit selected and interconnection switch;
Parameter input unit, for inputting electrical network parameter, described parameter at least comprises the circuit needing the relevant interconnector of the interconnection switch of cyclization, transformer station and a upper electric pressure;
Cyclization point selection unit, for according to described Selecting parameter cyclization point;
Load flow calculation unit, for the topological relation according to described cyclization interconnector, the flow data in conjunction with main electrical network calculates the trend distribution of the cyclization switch both sides of described cyclization point;
Alloy White Iron computing unit, for calculating the size of cyclization impulse current and steady-state current according to the trend distribution of described cyclization switch both sides;
Judging Tip element, for described cyclization impulse current and steady-state current result of calculation being compared with cyclization condition, providing the information of whether carrying out Loop Closing Operation according to comparative result.
Preferably, this area's power distribution network in-circuit emulation analytical equipment also comprises: data check unit, for verifying the main electric network data that described EMS system derives, and the accuracy of the power distribution network data of described PMS system derivation.
Described Alloy White Iron computing unit is specifically for calculating cyclization steady-state current according to Newton-Raphson approach, load on the circuit of interconnection switch both sides is added, the node of interconnection switch both sides is considered as same node, the topology of network changes thereupon, after Load flow calculation, the steady-state current after trying to achieve cyclization according to network cyclization voltage and branch impedance.
Described cyclization impulse current and steady-state current result of calculation compare with cyclization condition by described judgement Tip element, the prompting whether carrying out Loop Closing Operation is provided according to comparative result, be specially: the cyclization steady-state current that verify calculation obtains and cyclization impulse current, to reach the standard grade threshold value if one of them exceedes electric current, then provide the prompting not carrying out Loop Closing Operation.
Preferably, local distribution network in-circuit emulation analytical equipment also comprises: display unit, for show the network topology of described main electrical network, cyclization interconnector topological relation, whether carry out in the information of Loop Closing Operation at least one.
The embodiment of the present invention is a kind of local distribution network in-circuit emulation analytical system also, comprising:
Server, comprises above-mentioned local distribution network in-circuit emulation analytical equipment;
Distribution terminal, for transmission request information to described server, instructs operating personnel whether to carry out the Loop Closing Operation of power distribution network according to the information that described server returns; Wherein said solicited message is relevant to the Loop Closing Operation of power distribution network.
Preferably, described server and described distribution terminal realize with B/S framework under J2EE.
Preferably, described distribution terminal is accessed described server transmission described request information by browser mode or is obtained described information.
Preferably, described server comprises the first wireless transmit/receive units, and described distribution terminal comprises the second corresponding wireless transmit/receive units.
Preferably, described first wireless transmit/receive units and the second wireless transmit/receive units are GPRS communication unit, 3G communication unit or 4G communication unit.
Compared with prior art, beneficial effect of the present invention:
The present invention realizes main, distribution electric network data integrated modelling, change the mode that main distribution computation model is discrete in the past, in conjunction with the size of flow data and distribution calculation of parameter cyclization impulse current and steady-state current, and cyclization impulse current and steady-state current result of calculation are compared with cyclization condition, the information of whether carrying out Loop Closing Operation is provided according to comparative result, thus be protection circuit and equipment to greatest extent in the process of cyclization, maximum reduction Alloy White Iron, the misoperation of protecting electrical power system equipment is avoided to give security, make the safety in operation of power distribution network good, reliability is high.
Accompanying drawing explanation
Fig. 1 is the local distribution network in-circuit emulation analytical equipment schematic diagram in the embodiment of the present invention one;
Fig. 2 is that the transient state impulse current in the embodiment of the present invention calculates the first illustraton of model;
Fig. 3 is that the transient state impulse current in the embodiment of the present invention calculates the second illustraton of model;
Loop Closing Operation analytic process schematic diagram in Fig. 4 embodiment of the present invention;
Fig. 5 is the local distribution network in-circuit emulation analytical system schematic diagram in the embodiment of the present invention two.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail.But this should be interpreted as that the scope of the above-mentioned theme of the present invention is only limitted to following embodiment, all technology realized based on content of the present invention all belong to scope of the present invention.
The embodiment of the present invention one provides a kind of local distribution network in-circuit emulation analytical equipment, referring to Fig. 1, comprising:
Main distribution modeling unit, for the main electric network data that basis is derived by EMS system, the power distribution network data derived by PMS system, set up main distribution Integrated Model; Described main distribution Integrated Model at least comprises the network topology of main electrical network;
Interconnection switch selected cell, needs to carry out two cyclization circuits of Loop Closing Operation and the interconnection switch of correspondence for selecting in power distribution network;
Topology formation unit, for forming the topological relation of cyclization interconnector according to the described cyclization circuit selected and interconnection switch;
Parameter input unit, for inputting electrical network parameter, described parameter at least comprises the circuit needing the relevant interconnector of the interconnection switch of cyclization, transformer station and a upper electric pressure;
Cyclization point selection unit, for according to described Selecting parameter cyclization point;
Load flow calculation unit, for the topological relation according to described cyclization interconnector, the flow data in conjunction with main electrical network calculates the trend distribution of the cyclization switch both sides of described cyclization point;
Alloy White Iron computing unit, for calculating the size of cyclization impulse current and steady-state current according to the trend distribution of described cyclization switch both sides;
Judging Tip element, for described cyclization impulse current and steady-state current result of calculation being compared with cyclization condition, providing the information of whether carrying out Loop Closing Operation according to comparative result.
The present invention realizes main, distribution electric network data integrated modelling, change the mode that main distribution computation model is discrete in the past, in conjunction with the size of flow data and distribution calculation of parameter cyclization impulse current and steady-state current, and cyclization impulse current and steady-state current result of calculation are compared with cyclization condition, the information of whether carrying out Loop Closing Operation is provided according to comparative result, thus be protection circuit and equipment to greatest extent in the process of cyclization, maximum reduction Alloy White Iron, the misoperation of protecting electrical power system equipment is avoided to give security, make the safety in operation of power distribution network good, reliability is high.
Concrete, in the present embodiment, distribution data source is collected and is imported by form based on PMS system data, and the interactive modes such as topological diagram editor realize the collection in calculation of distribution network model data source.Based on EMS system, EMS major network topology is carried out data splicing with distribution data by overlapped data, realizes main, distribution electric network data integrated modelling, change the mode that main distribution computation model is discrete in the past.With major network EMS topology, measurement and device parameter for data source, directly set up on the basis of computation model by computer graphics algorithm, realize the modeling of distribution computation model.
This area's power distribution network in-circuit emulation analytical equipment also comprises: data check unit, for verifying the main electric network data that described EMS system derives, and the accuracy of the power distribution network data of described PMS system derivation.The error that may exist in the huge data-gathering process of distribution network, the present invention's research is by different computational methods, and different data-entry-forms realizes the cross check of data.By result of calculation and major network feed-in branch road are surveyed voltage, electric current checks, the accuracy of further checking distribution data modeling.
Described Alloy White Iron computing unit is specifically for calculating cyclization steady-state current according to Newton-Raphson approach, load on the circuit of interconnection switch both sides is added, the node of interconnection switch both sides is considered as same node, the topology of network changes thereupon, after Load flow calculation, the steady-state current after trying to achieve cyclization according to network cyclization voltage and branch impedance.
Load flow calculation is the basis of the various safety analysis of electric power system and calculating, in order to improve accuracy and the rapidity of Automation of Electric Systems operation, and can system, carry out in-situ analysis safely, the information of distribution power flow change is absolutely necessary resource, therefore carries out the development trend that distribution power system load flow calculation is Load flow calculation now.The present invention, on the basis of the various tidal current computing method com-parison and analysis of power distribution network, in conjunction with accuracy and convergence two aspect condition, proposes the circuit counting Three Phase Power Flow that combine inferior to newton's pressgang.The basis of the method establishes the detail mathematic model of each element of power distribution network, and in order to embody the authenticity of network configuration comprehensively, different mode of connections for transformer have carried out different node admittance matrix models respectively and have set up, the perfect foundation of model.
Described cyclization impulse current and steady-state current result of calculation compare with cyclization condition by described judgement Tip element, the prompting whether carrying out Loop Closing Operation is provided according to comparative result, be specially: the cyclization steady-state current that verify calculation obtains and cyclization impulse current, to reach the standard grade threshold value if one of them exceedes electric current, then provide the prompting not carrying out Loop Closing Operation.
Referring to Fig. 2 and Fig. 3, in the present embodiment, cyclization impulse current refers to by the electric current on main tapping on circuit breaker arranged side by side.In the cyclization process of reality, impulse current generally has higher amplitude, but the time continued is shorter, in engineering calculation process, the single-phase equivalent circuit of cyclization transient current as shown in Figure 1, in distribution network, circuit presents perceptual character, in the whole process completed to cyclization by the moment of cyclization, the Alloy White Iron of system is that the mode of shaking decays, and the corresponding form with the differential equation of real-time electric current is expressed.In the process calculated, the A phase in computation model is driving voltage, for:
Δ U is cyclization point both sides voltage differences, that is: △ U=U
1-U
2the non-odd differential equation of circuit is
the initial phase angle of E when α is cyclization moment t=0, it is determined by the phase angle difference of this moment cyclization point both sides voltage.
The particular solution of equation is:
i
p(t)＝Asin(wt+α)+Bcos(wt+α)
A＝RE
max/R
2+w
2l
2
B＝-wLE
max/R
2+w
2l
2
Separate completely as particular solution and general solution sum.
Cyclization inductance of front moment does not have electric current to pass through, can C1 be obtained, thus have the complete expression formula of impulse current:
Usually forward-backward sweep method or Newton-Raphson approach is adopted in the computational process of cyclization steady-state current.In the application process of forward-backward sweep method, only can be used for the Load flow calculation of radial net, range of application has larger limitation.
The step using Newton-Raphson approach to calculate cyclization steady-state current calculating cyclization steady-state current is, load on the circuit of interconnection switch both sides is added, the node of interconnection switch both sides is considered as same node, the topology of network changes thereupon, after Load flow calculation, the steady-state current after trying to achieve cyclization according to network cyclization voltage and branch impedance.
In power distribution network, carry out cyclization analysis is exactly on the basis of Load flow calculation, become with the Suzhou electric company south of a city, daybreak becomes and six li become more than the ten bar 10kV hung down distribution network closed loop circuits into pilot study object, cyclization analytical calculation and cyclization condition criterion [cyclization voltage difference, differential seat angle etc.], the calculating of Alloy White Iron and result of calculation are carried out to distribution and verify [verify by major network feeder line SCADA measuring point electric current or carry out contrast verification analysis with the distribution electricity that districts and cities gather].Referring to Fig. 4, the realization flow of this function is:
A) select interconnection switch, according to actual needs, complete the selection of cyclization circuit and cyclization switch.
B) according to the selection of cyclization switch, form network topology, and the integrality of topology and correctness are judged, form the basic database of system.
C) input of relevant parameter, comprises the relevant interconnector needing the interconnection switch of cyclization, transformer station, the relevant informations such as the circuit of a upper electric pressure.
D) Load flow calculation, according to the Power Flow Information of system-based information base information and Real-time Collection, calculates the trend distribution of cyclization switch both sides.
E) based on Load flow calculation, obtain the cyclization impulse current in closing the ring process and cyclization steady-state current.
F) verify cyclization steady-state current and cyclization impulse current, if correlated current is out-of-limit, system provides and stops order, does not carry out Loop Closing Operation.
In one embodiment, described local distribution network in-circuit emulation analytical equipment also comprises: display unit, for show the network topology of described main electrical network, cyclization interconnector topological relation, whether carry out in the information of Loop Closing Operation at least one.Can be giveed training by display, support that Training Management personnel make plan topic (such as distribution monitor is abnormal investigates training, the training of distribution accident treatment, distribution operation training etc.) by oneself, distribution operator on duty carries out analog simulation study according to the selected topic in system; Support that rolling type animation plays relevant material for training or Dynamic System material for training etc.Tool of the present invention has the following advantages:
1, on the basis of major network model, set up and perfect regional distribution topological model and parameter.
2, support that multi-modeling mode upgrades distribution network model, edit, preserves, maintain easily management.
3, with major network Real-time Power Flow data for condition, in conjunction with distribution nameplate parameter, theory deduction goes out the metric data such as distribution node load.
4, the verification of multiple distribution tidal current computing method to main distribution modeling and correlation theory derivation accuracy is realized.
5, realize distribution network closed loop grid switching operation analogue simulation function, provide the decision condition of Loop Closing Operation success.
The present invention is protection circuit and equipment to greatest extent in the process of cyclization, farthest reduces Alloy White Iron, avoids the misoperation of protecting electrical power system equipment to give security, such that the safety in operation of power distribution network is good, reliability is high.
The embodiment of the present invention two provides a kind of local distribution network in-circuit emulation analytical system, comprises server and distribution terminal.Described server comprises the local distribution network in-circuit emulation analytical equipment in above-described embodiment one.Described distribution terminal, for transmission request information to described server, instructs operating personnel whether to carry out the Loop Closing Operation of power distribution network according to the information that described server returns; Wherein said solicited message is relevant to the Loop Closing Operation of power distribution network.
Concrete, referring to Fig. 5, described server and described distribution terminal realize with B/S framework under J2EE.J2EE can be applicable to the develop and field of multilayer system, and framework of its exploitation is enterprise-level.Native system realizes with B/S framework under the framework of J2EE, and the framework of multilayer simplifies the operating process of system.Described distribution terminal is accessed described server by browser mode and is sent described request information or obtain described information.Described server comprises the first wireless transmit/receive units, and described distribution terminal comprises the second corresponding wireless transmit/receive units.Described first wireless transmit/receive units and the second wireless transmit/receive units are GPRS communication unit, 3G communication unit or 4G communication unit.Server is communicated by communication with distribution terminal.Can certainly be other communications.
Power distribution network is the unique direct part be connected with user in electric power system.The power supply of power distribution network directly impacts the power supply reliability of circuit.Today of society's high development, user has higher requirement to power supply quality.The efficiency of management of research and development power distribution network seems particularly important.In distribution network, provide outage information to be the operational objective of outage management with high real-time.Under this background, this system can be applied on a large scale in power supply enterprise, contributes to shortening interruption duration, improves user satisfaction, reduces power supply enterprise's cost, increases enterprise operation economic benefit.
Native system is according to cyclization basic theories, Loop Closing Operation answers the non-foundation of points for attention, propose the decision scheme whether allowing to perform Loop Closing Operation, illustrating can not the reason of cyclization, disclose the mechanism that cyclization after-current is excessive, and provide counter-measure, the realization of this system, demonstrate the cyclization that the program can be electric power system and aid decision is provided, and then improve power supply reliability.
By reference to the accompanying drawings the specific embodiment of the present invention is described in detail above, but the present invention is not restricted to above-mentioned execution mode, in the spirit and scope situation of claim not departing from the application, those skilled in the art can make various amendment or remodeling.
Claims (10)
1. a local distribution network in-circuit emulation analytical equipment, is characterized in that, comprising:
Main distribution modeling unit, for the main electric network data that basis is derived by EMS system, the power distribution network data derived by PMS system, set up main distribution Integrated Model; Described main distribution Integrated Model at least comprises the network topology of main electrical network;
Interconnection switch selected cell, needs to carry out two cyclization circuits of Loop Closing Operation and the interconnection switch of correspondence for selecting in power distribution network;
Topology formation unit, for forming the topological relation of cyclization interconnector according to the described cyclization circuit selected and interconnection switch;
Parameter input unit, for inputting electrical network parameter, described parameter at least comprises the circuit needing the relevant interconnector of the interconnection switch of cyclization, transformer station and a upper electric pressure;
Cyclization point selection unit, for according to described Selecting parameter cyclization point;
Load flow calculation unit, for the topological relation according to described cyclization interconnector, the flow data in conjunction with main electrical network calculates the trend distribution of the cyclization switch both sides of described cyclization point;
Alloy White Iron computing unit, for calculating the size of cyclization impulse current and steady-state current according to the trend distribution of described cyclization switch both sides;
Judging Tip element, for described cyclization impulse current and steady-state current result of calculation being compared with cyclization condition, providing the information of whether carrying out Loop Closing Operation according to comparative result.
2. local distribution network in-circuit emulation analytical equipment according to claim 1, is characterized in that, also comprise:
Data check unit, for verifying the main electric network data that described EMS system derives, and the accuracy of the power distribution network data of described PMS system derivation.
3. local distribution network in-circuit emulation analytical equipment according to claim 1, it is characterized in that, described Alloy White Iron computing unit is specifically for calculating cyclization steady-state current according to Newton-Raphson approach, load on the circuit of interconnection switch both sides is added, the node of interconnection switch both sides is considered as same node, the topology of network changes thereupon, after Load flow calculation, and the steady-state current after trying to achieve cyclization according to network cyclization voltage and branch impedance.
4. local distribution network in-circuit emulation analytical equipment according to claim 1, it is characterized in that, described cyclization impulse current and steady-state current result of calculation compare with cyclization condition by described judgement Tip element, provide the prompting whether carrying out Loop Closing Operation, be specially according to comparative result:
The cyclization steady-state current that verify calculation obtains and cyclization impulse current, to reach the standard grade threshold value if one of them exceedes electric current, then provide the prompting not carrying out Loop Closing Operation.
5. local distribution network in-circuit emulation analytical equipment according to claim 1, is characterized in that, also comprise:
Display unit, for show the network topology of described main electrical network, cyclization interconnector topological relation, whether carry out in the information of Loop Closing Operation at least one.
6. a local distribution network in-circuit emulation analytical system, is characterized in that, comprising:
Server, comprises the local distribution network in-circuit emulation analytical equipment described in any one of claim 1-5;
Distribution terminal, for transmission request information to described server, instructs operating personnel whether to carry out the Loop Closing Operation of power distribution network according to the information that described server returns; Wherein said solicited message is relevant to the Loop Closing Operation of power distribution network.
7. local distribution network in-circuit emulation analytical system according to claim 6, is characterized in that, described server and described distribution terminal realize with B/S framework under J2EE.
8. the local distribution network in-circuit emulation analytical system according to claim 6 or 7, is characterized in that, described distribution terminal is accessed described server by browser mode and sent described request information or obtain described information.
9. local distribution network in-circuit emulation analytical system according to claim 8, it is characterized in that, described server comprises the first wireless transmit/receive units, and described distribution terminal comprises the second corresponding wireless transmit/receive units.
10. local distribution network in-circuit emulation analytical system according to claim 9, is characterized in that, described first wireless transmit/receive units and the second wireless transmit/receive units are GPRS communication unit, 3G communication unit or 4G communication unit.
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| CN106130781A (en) * | 2016-07-19 | 2016-11-16 | 国网江苏省电力公司电力科学研究院 | Transformer fault accumulative effect appraisal procedure based on power distribution network topological model |
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| CN106655176A (en) * | 2017-01-17 | 2017-05-10 | 广东工业大学 | Online loop closing decision method and system for power distribution network |
| CN106655176B (en) * | 2017-01-17 | 2020-05-08 | 广东工业大学 | Power distribution network online loop closing decision method and system |
| CN106786609A (en) * | 2017-04-05 | 2017-05-31 | 国网山东省电力公司济南供电公司 | A kind of distribution line cyclization fast calibration method based on data fusion |
| CN106919064A (en) * | 2017-04-18 | 2017-07-04 | 国网上海市电力公司 | Collaborative simulation interface setting method |
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| CN110224406A (en) * | 2019-05-21 | 2019-09-10 | 国网河南省电力公司荥阳市供电公司 | For increasing the method and device of electric power responsible consumer electricity consumption reliability in two lines road |
| CN110672982A (en) * | 2019-11-14 | 2020-01-10 | 广东电网有限责任公司 | Detection method and system for preventing long-term loop closing operation of power distribution network and readable storage medium |
| CN110994610A (en) * | 2019-12-24 | 2020-04-10 | 国网天津市电力公司 | Monitoring information assistance-based loop closing method and device for power distribution network line |
| CN111444664A (en) * | 2020-02-26 | 2020-07-24 | 广东电网有限责任公司 | Power distribution network closed loop current calculation method and system containing multi-branch line |
| CN111444664B (en) * | 2020-02-26 | 2022-02-11 | 广东电网有限责任公司 | Power distribution network closed loop current calculation method and system containing multi-branch line |
| CN115983737A (en) * | 2023-02-17 | 2023-04-18 | 北京中恒博瑞数字电力科技有限公司 | Method and device for processing power grid data in electromagnetic loop and computer equipment |
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