CN102904346B - On-off control method and device of loop closing switch of 10kV power distribution network - Google Patents
On-off control method and device of loop closing switch of 10kV power distribution network Download PDFInfo
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- CN102904346B CN102904346B CN201210430667.6A CN201210430667A CN102904346B CN 102904346 B CN102904346 B CN 102904346B CN 201210430667 A CN201210430667 A CN 201210430667A CN 102904346 B CN102904346 B CN 102904346B
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Abstract
The embodiment of the invention discloses an on-off control method of a loop closing switch of a 10kV power distribution network. The on-off control method comprises the steps of: obtaining a steady-state current when each feeder line which is to be subjected to loop closing operation is not subjected to loop closing operation; estimating a conduction ring current after approaching loop closing according to a power distribution network parameter; calculating a loop closing current of each feeder line to be subjected to loop closing operation according to the obtained steady-state current when not subjected to loop closing operation and the estimated conduction ring current after approaching the loop closing; and controlling a loop closing switch to be switched on or kept to be switched off according to the loop closing current. The embodiment of the invention also discloses an on-off control device of a loop closing switch of a 10kV power distribution network. According to the scheme of the embodiment of the invention, the accuracy and the promptness of the control of the loop closing switch are improved.
Description
Technical field
The application relates to technical field of electric power, particularly relates to a kind of 10kV closed loop network switch on and off control method and related device thereof.
Background technology
Along with the development extensively and profoundly of electric power application, the requirement of people to power supply reliability is more and more higher.For improving power supply reliability, technical field of electric power adopts bidirectional power supply pattern usually.In this mode, if need to carry out line maintenance, network load shift, reciprocity matters are answered in accident, the mode of Loop Closing Operation is carried out by involutive ring switches such as direct connections between closed interconnection switch (or bus connection switch), transformer station, select a preferably supply path, avoid occurring large-area power-cuts or excessively having a power failure, thus ensure the reliable power supply of power distribution network.
But; after the Loop Closing Operation of involutive ring switch makes cyclization switch conduction; in most of the cases will produce new electric current; this new electric current can be presented as the steady-state current after Loop Closing Operation in certain hour; also can be presented as the transient state impulse current that Loop Closing Operation occurs instantaneously, if steady-state current or transient state impulse current excessive, not only easily cause the apparatus overload in feedline circuit; and protection act malfunction may be caused, cause unnecessary power failure or other accidents.Visible, being turned on or off of cyclization switch controls for ensureing that electric power system reliable power supply is significant.
The method that a kind of 10kV closed loop network switch on and off that prior art provides controls is: estimated by the experience of the executor of Loop Closing Operation and take break-make measure the need of involutive ring switch, namely opens or closes closed hoop switch.The method can not control cyclization switch on and off exactly, if experience is estimated too to advance rashly, makes originally can adopt Loop Closing Operation transfer electrical power and fails to adopt, causing this waste, reduce power supply reliability; If experience estimated value is too small, actual value may be made to exceed overcurrent or fast tripping protection value, thus occur accident.As can be seen here, prior art does not provide the method for a 10kV closed loop network switch on and off control accurately and effectively.
Summary of the invention
For solving the problems of the technologies described above, the embodiment of the present application provides a kind of 10kV closed loop network switch on and off control method and device, to judge whether exactly to need to adopt Loop Closing Operation, and then reduce or avoid cyclization mistake to cause accident, improving the power supply reliability of electric power system on the whole.
The 10kV closed loop network switch on and off control method that the embodiment of the present application provides comprises:
Obtain steady-state current during the non-cyclization of each feedline circuit of pending Loop Closing Operation;
According to the conducting circulation after power distribution network parameter estimation matching ring;
According to the Alloy White Iron of each feedline circuit of the pending Loop Closing Operation of conducting calculation of circulating current after steady-state current during the non-cyclization obtained and estimation matching ring;
Control the connection of cyclization switch according to described Alloy White Iron or remain open.
Preferably, describedly specifically to comprise according to the conducting circulation after power distribution network parameter estimation matching ring:
According to the voltage data of the power data after power distribution network calculation of parameter matching ring and each feeder line, the conducting circulation after utilizing this power data and voltage data to obtain matching ring.
Further preferably, describedly specifically to comprise according to the power data after power distribution network calculation of parameter matching ring:
Judge whether each feedline circuit of pending Loop Closing Operation meets the whole network Load flow calculation condition, if met, then by obtaining the voltage data of 10kV power distribution network to the Load flow calculation of the whole network, the Load flow calculation utilizing this voltage data to carry out each feeder line obtains power data; If do not met, then:
Judge the 220kV voltage partition whether each feedline circuit of pending Loop Closing Operation belongs to identical, if so, then with 220kV substation bus bar for basic point, by the radiation network of this basic point is carried out Load flow calculation obtain power data; If not, then receive major network calculation of tidal current by power distribution network and obtain power data.
Further preferably, specifically comprise according to the voltage data after power distribution network calculation of parameter matching ring:
Obtain the load data of power distribution network, obtained the voltage data of each feeder line by duty values such as calculating.
The embodiment of the present application additionally provides a kind of 10kV closed loop network switch on and off control device.This device comprises: steady-state current acquiring unit, circulation evaluation unit, Alloy White Iron computing unit and on-off control unit, wherein:
Described steady-state current acquiring unit, steady-state current during the non-cyclization of each feedline circuit for obtaining pending Loop Closing Operation;
Described circulation evaluation unit, for according to the conducting circulation after power distribution network parameter estimation matching ring;
Described Alloy White Iron computing unit, for the Alloy White Iron of each feedline circuit according to the pending Loop Closing Operation of conducting calculation of circulating current after steady-state current during the non-cyclization obtained and estimation matching ring;
Described on-off control unit, for controlling the connection of cyclization switch according to described Alloy White Iron or remaining open.
Preferably, described circulation evaluation unit specifically comprises: power data computation subunit and voltage data computation subunit and calculation of circulating current subelement, wherein:
Described power data computation subunit, for according to the power data after power distribution network calculation of parameter matching ring;
Described voltage data computation subunit, for the voltage data according to each feeder line after power distribution network calculation of parameter matching ring;
Described calculation of circulating current subelement, obtains the conducting circulation after matching ring for utilizing this power data and voltage data.
Further preferably, power data computation subunit specifically obtains power data in the following manner:
Judge whether each feedline circuit of pending Loop Closing Operation meets the whole network Load flow calculation condition, if met, then by obtaining the voltage data of 10kV power distribution network to the Load flow calculation of the whole network, the Load flow calculation utilizing this voltage data to carry out each feeder line obtains power data; If do not met, then:
Judge the 220kV voltage partition whether each feedline circuit of pending Loop Closing Operation belongs to identical, if so, then with 220kV substation bus bar for basic point, by the radiation network of this basic point is carried out Load flow calculation obtain power data; If not, then receive major network calculation of tidal current by power distribution network and obtain power data.
Further preferably, voltage data computation subunit specifically obtains voltage data in the following manner:
Obtain the load data of power distribution network, obtained the voltage data of each feeder line by duty values such as calculating.
The embodiment of the present application, after obtaining the steady-state current before non-cyclization, according to the conducting circulation after power distribution network parameter estimation matching ring, then according to these two numerical computations Alloy White Iron, and then controls the connection of cyclization switch according to Alloy White Iron or remains open.Compared with prior art, the embodiment of the present application replaces simple micro-judgment by concrete calculating, by controlling the break-make of cyclization switch to the judgement of result of calculation, improves the accuracy of cyclization switch control rule.And, in computational process Alloy White Iron process, be split as the calculating of the conducting circulation after the steady-state current before involutive ring and simulation cyclization, the calculating carried out based on this simplified model comparatively fast can obtain Alloy White Iron, thus is conducive to realizing in time the conducting of involutive ring switch or remains open state.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, the accompanying drawing that the following describes is only some embodiments recorded in the application, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the embodiment of the present application feeder line Loop Closing Operation principle schematic;
Fig. 2 is the embodiment flow chart of the 10kV closed loop network method of controlling switch of the application;
Fig. 3 is the 10kV closed loop network switch on and off control device example structure block diagram of the application.
Embodiment
Technical scheme in the application is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present application, technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment is only some embodiments of the present application, instead of whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all should belong to the scope of the application's protection.
For enabling above-mentioned purpose, the feature and advantage of the application more become apparent, first the principle that the embodiment of the present application relates to Loop Closing Operation being introduced below, then with embodiment, the application being described in further detail by reference to the accompanying drawings.
See Fig. 1, the figure shows the power distribution network circuit connection diagram connecting cyclization switch.When cyclization switch Brk1 is in off-state (two feedline circuit independent operating separately of power distribution network), the electric current of feedline circuit 1 is i
1, the electric current of feedline circuit 2 is i
2, these two electric currents separately independent stable state exist; When cyclization switch Brk1 is in closed conducting state, due to cyclization switch Brk1 both sides voltage usually unequal (comprising voltage magnitude and phase angle), so certainly will produce cyclization On current i
loop.The electric current (Alloy White Iron) that cyclization switch closes in rear each bar feedline circuit will change:
(1) electric current I in feedline circuit 1
c1for:
I
c1＝i
1+i
loop
(2) electric current I in feedline circuit 2
c2for:
I
c2＝i
2-i
loop
As can be seen here, the whole process asking for Alloy White Iron can be divided into two sub-steps: one is the steady-state current asking for each feedline circuit of power distribution network before Loop Closing Operation, two is conducting circulation when operating after asking for cyclization, can calculate Alloy White Iron according to these two current values.Because the application to realize the control of involutive ring switch by the judgement of involutive ring electric current, need according to the On current after the existing parameter derivation cyclization of power distribution network when asking for conducting circulation.The particular type of the application to the cyclization switch completing Loop Closing Operation does not have special restriction, can be interconnection switch, can be bus connection switch yet, or other similar switches.
By the introduction of above-mentioned principle, the Integral Thought of the embodiment of the present application is: the network any one being carried out to Loop Closing Operation, according to circuit add-up principle, the steady-state current before its effect is equal to Loop Closing Operation under open loop operation situation superposes with the conducting circulation produced due to cyclization switch both sides electrical potential difference after Loop Closing Operation.In conjunction with this thinking, describe the technical scheme of the application below in detail.See Fig. 2, the figure shows the embodiment flow process of the 10kV closed loop network method of controlling switch of the application.This embodiment comprises:
Step S201: obtain steady-state current during the non-cyclization of each feedline circuit of pending Loop Closing Operation;
Steady-state current to ask for mode more, Load flow calculation usually can be adopted to realize.Set up at model based on power distribution network, in data acquisition and identification etc. with the difference of major network, Load flow calculation can be divided into two parts to carry out: obtained the distribution of 10kV above trend to major network Load flow calculation before this, and then carried out power flow calculation for radial networks calculating to feeder line section.
Step S202: according to the conducting circulation after power distribution network parameter estimation matching ring;
For calculating conducting circulation, can first according to the voltage data of the power data after power distribution network calculation of parameter matching ring and each feeder line, the conducting circulation after then utilizing this power data and voltage data to obtain matching ring.
For power data, in actual applications, the complexity of the feedline circuit faced by Loop Closing Operation, usually distinguishes different situations and obtains power data.Discuss respectively according to different situations below:
(1) identical 220kV voltage partition situation
After a feedline circuit and another feedline circuit perform Loop Closing Operation by cyclization switch, if possess the whole network Load flow calculation (NR/PQ) condition, so directly can consider that carrying out Load flow calculation obtains 10KV voltage data, then carries out feeder line section Load flow calculation by front postponing for method; If because condition restriction does not have the condition of the whole network Load flow calculation, so owing to belonging to a subregion together, can with 220KV substation bus bar for basic point, the service data that Load flow calculation obtains 10kV bus being carried out to the radiation network of this basic point, then carrying out feeder line section Load flow calculation acquisition power data by front postponing for method.Here the whole network Load flow calculation condition can be arranged according to actual conditions, can be such as that voltage difference is no more than 10%, phase angle difference is no more than 30 degree, each element nonoverload in ring, can not cause protection and automatics malfunction etc.Here " front postpone generation " is the one specialty computational methods used in technical field of electric power, and its principle process is as follows:
For given system of linear equations x=B x+f (wherein: x, B, f are matrix), use formula x
(k+1)=Bx
(k)+ f (wherein, k represents iterations, and it is initially 0) progressively brings into and asks approximate solution.If when k trend is infinitely great, limx
(k)exist, be designated as x*, now x* is solution of equations.Formula for power domain is as follows:
(2) different 220KV voltage partitions situation
After a feedline circuit and another feedline circuit carry out Loop Closing Operation by cyclization switch, if possess the whole network Load flow calculation (NR/PQ) condition, mode same as described above so can be adopted to obtain voltage data; If because condition restriction does not have the whole network Load flow calculation condition, owing to not belonging to a subregion, radiation network mode can not be adopted solve, now, can receive from major network the target that information realization obtains voltage data by power distribution network, the result sent by E language format after such as first receiving major network Load flow calculation, then carries out feeder line section Load flow calculation acquisition power data by front postponing for method.
For voltage data, need the problem paying close attention to load data: in the ideal case, the distribution situation of various load data can get, and now can accurately calculate voltage; In real process, because situation is complicated, the acquisition of load data is also imperfect, now situation can adopt through engineering approaches process, isodensity distribution is carried out by load data, after distribution feeder line length is determined, equivalent impedance (or load) can be calculated according to a certain percentage, utilize equivalent impedance (or load) to carry out the calculating of feeder line section voltage data.
Step S203: according to the Alloy White Iron of each feedline circuit of the pending Loop Closing Operation of conducting calculation of circulating current after steady-state current during the non-cyclization obtained and estimation matching ring;
After obtaining steady-state current and On current by abovementioned steps, can according to aforementioned I
c1, I
c2the Alloy White Iron of each feedline circuit of formulae discovery.
Step S204: control the connection of cyclization switch according to described Alloy White Iron or remain open;
After obtaining Alloy White Iron, the safe current threshold values of the loading condition on the Alloy White Iron of each feedline circuit and this feedline circuit and/or false protection can be compared, if do not exceed corresponding load and/or safe current threshold values, then carry out Loop Closing Operation, control cyclization switch connection; Otherwise, continue to keep cyclization switch off state.
The embodiment of the present application, after obtaining the steady-state current before non-cyclization, according to the conducting circulation after power distribution network parameter estimation matching ring, then according to these two numerical computations Alloy White Iron, and then controls the connection of cyclization switch according to Alloy White Iron or remains open.Compared with prior art, the embodiment of the present application replaces simple micro-judgment by concrete calculating, by controlling the break-make of cyclization switch to the judgement of result of calculation, improves the accuracy of cyclization switch control rule.And, in computational process Alloy White Iron process, be split as the calculating of the conducting circulation after the steady-state current before involutive ring and simulation cyclization, the calculating carried out based on this simplified model comparatively fast can obtain Alloy White Iron, thus is conducive to realizing in time the conducting of involutive ring switch or remains open state.
It should be noted that the Load flow calculation of electric power system is that the one studying power system mesomeric state ruuning situation substantially electrically calculates.Its task is the running status according to given service conditions and network configuration determination whole system, as the voltage (amplitude and phase angle) on each bus, the distribution of the power in network and power loss etc.The embodiment of the present application is not construed as limiting for the concrete mode of Load flow calculation, such as can adopt PQ decomposition method, Newton method (power formula), optimal multiplier method, Newton method (current type), PQ decomposition method Newton method etc., in actual application, wherein one or more can be selected according to the requirement of the precision calculated and convenience.
Be more than the description to the application's embodiment of the method, corresponding with embodiment of the method, the embodiment of the present application additionally provides a kind of 10kV closed loop network switch on and off control device.See Fig. 3, the figure shows the structured flowchart of 10kV closed loop network switch on and off control device.This device embodiment comprises: steady-state current acquiring unit 301, circulation evaluation unit 302, Alloy White Iron computing unit 303 and on-off control unit 304, wherein:
Steady-state current acquiring unit 301, steady-state current during the non-cyclization of each feedline circuit for obtaining pending Loop Closing Operation;
Circulation evaluation unit 302, for according to the conducting circulation after power distribution network parameter estimation matching ring;
Alloy White Iron computing unit 303, for the Alloy White Iron of each feedline circuit according to the pending Loop Closing Operation of conducting calculation of circulating current after steady-state current during the non-cyclization obtained and estimation matching ring;
On-off control unit 304, for controlling the connection of cyclization switch according to Alloy White Iron or remaining open.
The course of work of said apparatus embodiment is: steady-state current acquiring unit 301 obtains steady-state current during the non-cyclization of each feedline circuit of pending Loop Closing Operation, and circulation evaluation unit 302 is according to the conducting circulation after power distribution network parameter estimation matching ring; Then by the Alloy White Iron of Alloy White Iron computing unit 303 according to each feedline circuit of the pending Loop Closing Operation of conducting calculation of circulating current after steady-state current during the non-cyclization obtained and estimation matching ring, finally control the connection of cyclization switch by on-off control unit 304 according to Alloy White Iron or remain open.
This device embodiment, after obtaining the steady-state current before non-cyclization, according to the conducting circulation after power distribution network parameter estimation matching ring, then according to these two numerical computations Alloy White Iron, and then controls the connection of cyclization switch according to Alloy White Iron or remains open.Compared with prior art, this device embodiment replaces simple micro-judgment by concrete calculating, by controlling the break-make of cyclization switch to the judgement of result of calculation, improves the accuracy of cyclization switch control rule.And, in computational process Alloy White Iron process, be split as the calculating of the conducting circulation after the steady-state current before involutive ring and simulation cyclization, the calculating carried out based on this simplified model comparatively fast can obtain Alloy White Iron, thus is conducive to realizing in time the conducting of involutive ring switch or remains open state.
Conducting circulation evaluation unit in this device embodiment, according to the difference estimation mode to conducting circulation, can have different composition structures.Such as, circulation evaluation unit 302 specifically can comprise: power data computation subunit 3021, voltage data computation subunit 3022 and calculation of circulating current subelement 3023, wherein: power data computation subunit 3021, for according to the power data after power distribution network calculation of parameter matching ring; Voltage data computation subunit 3022, for the voltage data according to each feeder line after power distribution network calculation of parameter matching ring; Calculation of circulating current subelement 3023, obtains the conducting circulation after matching ring for utilizing this power data and voltage data.This mode by obtaining power data and voltage data calculating conducting circulation is convenient and swift.Above-mentioned power data computation subunit specifically can obtain power data in the following manner: judge whether each feedline circuit of pending Loop Closing Operation meets the whole network Load flow calculation condition, if met, then by obtaining the voltage data of 10kV power distribution network to the Load flow calculation of the whole network, the Load flow calculation utilizing this voltage data to carry out each feeder line obtains power data; If do not met, then: judge the 220kV voltage partition whether each feedline circuit of pending Loop Closing Operation belongs to identical, if so, then with 220kV substation bus bar for basic point, by the radiation network of this basic point is carried out Load flow calculation obtain power data; If not, then receive major network calculation of tidal current by power distribution network and obtain power data.Voltage data computation subunit specifically obtains power data in the following manner: the load data obtaining power distribution network, obtains the voltage data of each feeder line by duty values such as calculating.
For convenience of description, various unit is divided into describe respectively with function when describing above device.Certainly, the function of each unit can be realized in same or multiple software and/or hardware when implementing the application.
As seen through the above description of the embodiments, those skilled in the art can be well understood to the mode that the application can add required general hardware platform by software and realizes.Based on such understanding, the technical scheme of the application can embody with the form of software product the part that prior art contributes in essence in other words, this computer software product can be stored in storage medium, as ROM/RAM, magnetic disc, CD etc., comprising some instructions in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) perform the method described in some part of each embodiment of the application or embodiment.
Each embodiment in this specification all adopts the mode of going forward one by one to describe, between each embodiment identical similar part mutually see, what each embodiment stressed is the difference with other embodiments.Especially, for system embodiment, because it is substantially similar to embodiment of the method, so describe fairly simple, relevant part illustrates see the part of embodiment of the method.System embodiment described above is only schematic, the wherein said unit illustrated as separating component or can may not be and physically separates, parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed in multiple network element.Some or all of module wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.Those of ordinary skill in the art, when not paying creative work, are namely appreciated that and implement.
The application can be used in numerous general or special purpose computing system environment or configuration.Such as: personal computer, server computer, handheld device or portable set, laptop device, multicomputer system, system, set top box, programmable consumer-elcetronics devices, network PC, minicom, mainframe computer, the distributed computing environment (DCE) comprising above any system or equipment etc. based on microprocessor.
The application can describe in the general context of computer executable instructions, such as program module.Usually, program module comprises the routine, program, object, assembly, data structure etc. that perform particular task or realize particular abstract data type.Also can put into practice the application in a distributed computing environment, in these distributed computing environment (DCE), be executed the task by the remote processing devices be connected by communication network.In a distributed computing environment, program module can be arranged in the local and remote computer-readable storage medium comprising memory device.
The above is only the embodiment of the application; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the application's principle; can also make some improvements and modifications, these improvements and modifications also should be considered as the protection range of the application.
Claims (1)
1. a 10kV closed loop network switch on and off control method, it is characterized in that, the method comprises:
Obtain steady-state current during the non-cyclization of each feedline circuit of pending Loop Closing Operation;
According to the conducting circulation after power distribution network parameter estimation matching ring; Specifically comprise:
According to the voltage data of the power data after power distribution network calculation of parameter matching ring and each feeder line, the conducting circulation after utilizing this power data and voltage data to obtain matching ring;
Wherein, describedly specifically to comprise according to the power data after power distribution network calculation of parameter matching ring:
Judge whether each feedline circuit of pending Loop Closing Operation meets the whole network Load flow calculation condition, if met, then by obtaining the voltage data of 10kV power distribution network to the Load flow calculation of the whole network, then carry out feeder line section Load flow calculation by front postponing for method, the Load flow calculation utilizing this voltage data to carry out each feeder line obtains power data; If do not met, then:
Judge the 220kV voltage partition whether each feedline circuit of pending Loop Closing Operation belongs to identical, if, then with 220kV substation bus bar for basic point, power data is obtained by carrying out Load flow calculation to the radiation network of this basic point, be specially, the service data that Load flow calculation obtains 10kV bus being carried out to the radiation network of this basic point, then carrying out feeder line section Load flow calculation acquisition power data by front postponing for method; If not, then receive major network calculation of tidal current by power distribution network and obtain power data; The calculation procedure postponed before described for method is:
For given system of linear equations x=B x+f, use formula x
(k+1)=Bx
(k)+ f progressively brings into and asks approximate solution, if when k trend is infinitely great, and limx
(k)exist, be designated as x*, now x* is solution of equations, and wherein x, B, f are matrix, and k represents iterations, and it is initially 0;
Describedly specifically to comprise according to the voltage data after power distribution network calculation of parameter matching ring:
Obtain the load data of power distribution network, obtained the voltage data of each feeder line by duty values such as calculating;
According to the Alloy White Iron of each feedline circuit of the pending Loop Closing Operation of conducting calculation of circulating current after steady-state current during the non-cyclization obtained and estimation matching ring;
Control the connection of cyclization switch according to described Alloy White Iron or remain open.
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| CN103595039B (en) * | 2013-10-17 | 2015-08-05 | 广东电网公司茂名供电局 | The distributed cyclization risk analysis method of network system |
| CN105656203B (en) * | 2016-01-29 | 2018-01-12 | 国网山东省电力公司青岛供电公司 | A kind of Loop Closing Operation control method and device |
| CN105958484B (en) * | 2016-06-02 | 2019-10-25 | 国网北京市电力公司 | Transformer cyclization control circuit and transformer cyclization control method and device |
| CN106300347B (en) * | 2016-11-01 | 2018-07-13 | 云南电网有限责任公司昆明供电局 | A kind of engineer application method that can quickly determine 10kV distribution line cyclization tune electricity feasibilities |
| 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 |
| CN109327024A (en) * | 2018-08-14 | 2019-02-12 | 广东电网有限责任公司 | Power distribution network electric current detecting method, device and computer readable storage medium |
| CN111725835A (en) * | 2020-05-01 | 2020-09-29 | 上海交通大学 | Method for restraining loop closing operation impact current of power distribution network containing distributed power supply |
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| CN102496929A (en) * | 2011-12-23 | 2012-06-13 | 宁波电业局 | Method, device and system for closing and opening ring |
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