CN102710022B - Power distribution network feeder protection and reconfiguration scheme based on intelligent feeder terminal unit - Google Patents

Power distribution network feeder protection and reconfiguration scheme based on intelligent feeder terminal unit Download PDF

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Publication number
CN102710022B
CN102710022B CN201210193399.0A CN201210193399A CN102710022B CN 102710022 B CN102710022 B CN 102710022B CN 201210193399 A CN201210193399 A CN 201210193399A CN 102710022 B CN102710022 B CN 102710022B
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China
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circuit breaker
feed line
terminal
feeder
automatization terminal
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CN201210193399.0A
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Chinese (zh)
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CN102710022A (en
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王朝明
马春生
陈谦
王华广
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南京软核科技有限公司
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • YGENERAL 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS 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
    • Y04S10/00Systems supporting electrical power generation, transmission or distribution
    • Y04S10/20Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems

Abstract

The invention relates to a power distribution network feeder protection and reconfiguration scheme based on an intelligent feeder terminal unit (FTU). The power distribution network feeder protection and reconfiguration scheme based on the intelligent FTU comprises the following processing methods: 1, acquisition and transmission of line real-time data by the FTU under the normal work state of the line; 2, selection of the FTU; 3, concrete strategy when short circuit fault occurs at the transient fault point; and 4, strategy when short circuit fault occurs at the permanent fault point. The power distribution network feeder protection and reconfiguration scheme based on the intelligent FTU has the advantages of realizing functions of effectively transmitting the feeder real-time data, monitoring the distribution network structure, quickly isolating fault and reconfiguring and realizing the corresponding functions of the original system configured with a master station and a secondary station by configuring the relatively simple background management machine, so that the independence of the FTU, the rapidity of fault clearing and the safety of the system are improved. The operation mode of the intelligent FTU is set, so that the intelligent FTU is based on a high-speed communication platform and does not completely depend on communication.

Description

Distribution feeder protect and reconstruct method based on Intelligent feeder line automation terminal
Technical field
What the present invention relates to is a kind of protect and reconstruct method of (6kV, 10kV, 20kV) distribution feeder of pressing in electric power system based on Intelligent feeder line automation terminal, belongs to distribution feeder protect and reconstruct technical field.
Background technology
Power supply reliability is that electric power enterprise is striven for first-class important technology index, and highly reliable, high-quality power supply is the primary condition that electric power enterprise is carried out sale of electricity service.Grid automation, as a kind of important technological means that improves power supply reliability, is more and more paid attention to by power department.Country is when input substantial contribution carries out Construction of Intercity Network and transformation at present, and distribution network automated pilot project is also included urban network restructuring plan in.For distribution network automated, process and mainly to comprise: real time data collection, fault automatically detect and Fault Identification, and the reliability of distribution terminal and real-time directly affect reliability and the real-time of whole DA system.Existed in the past the protection scheme of power distribution automation is had to a lot of understanding, and the effect logic of terminal equipment FTU device can not meet distribution network automated requirement, China does not have function admirable 10kv feeder automation protective device now.The performances such as real-time of the rapidity of failure removal, the fail safe of system and data can not well be met.Adopt protected mode to realize power distribution automation and there is quick Fault Isolation, but require to need between switch special communication port, and requirement need to be differentiated sense of current.Be all to coordinate with distribution automation main website recovery, distribution automation system is controlled and is had scheduling authority and complicated problem is installed transformer station's head end switch; Communication dependence to feed line automatization terminal FTU is very strong, works as communicating interrupt, and the work of feed line automatization terminal FTU is affected, and has the problem of security of system; Fault selectivity and service restoration ability all do not have well to ensure.On the spot type when restoring electricity, can cause the repeatedly impact to electrical network, and the time that restores electricity is long.The feeder line solution of domestic distribution automation has concentrated and two kinds, type on the spot.Concentrated is by means of communication, by the cooperation of distribution terminal and distribution main website, and when breaking down, failure judgement region, and by remote control or artificial isolated fault region, recover the power supply of non-fault zone.Type feeder automation comprises voltage-time limiting mode (Japanese model), automatic circuit mode, intelligent distributed etc. on the spot.
Summary of the invention
What the present invention proposed is a kind of distribution feeder protect and reconstruct method based on Intelligent feeder line automation terminal; its object is intended to overcome the existing above-mentioned defect of prior art; have without relying on distribution main website; by terminal, intercom mutually, protect cooperation or sequential to coordinate; when power distribution network breaks down; isolated fault region, recovers the power supply of non-fault zone, and reports the functions such as processing procedure and result.
Technical solution of the present invention: the distribution feeder protect and reconstruct method based on Intelligent feeder line automation terminal, is characterized in that the method comprises following processing method: one, collection and the transmission of the complete paired transmission line real time data of feed line automatization terminal FTU under circuit normal operating conditions; Feeder-terminal-unit, by the TCP/IP communications protocol of bottom, realize the real-time communication between feeder-terminal-unit, guarantee that each feed line automatization terminal FTU all can obtain the state information of other several feed line automatization terminal FTU, thereby realize supplier of electricity to judgement, the calculating of front and back node, for protecting strategy that corresponding Data support is provided;
Two, the selection of feed line automatization terminal FTU: because each feed line automatization terminal FTU all can obtain the state information of other several feed line automatization terminal FTU, so master control Intelligent feeder line automation terminal is changeable, the minimum automatic startup master control function of feed line automatization terminal FTU numbering in the normal node of communication, become master control Intelligent feeder line automation terminal, the function of master control Intelligent feeder line automation terminal comprises the running status of monitoring every other common feed line automatization terminal FTU, and in system, there is to cause due to fault the coordination of the postrun automatic reconfiguration of off-the-line,
Three, when transient fault point K0 is short-circuited fault, 1) the second circuit breaker S2 forwards the first circuit breaker S1 send a segment protect block signal, and the second circuit breaker S2 tripping operation, although now the first circuit breaker S1 also detects short circuit current, but because it receives a segment protect locking, therefore do not carry out trip operation;
2) the 3rd circuit breaker S3 sends off-the-line block signal to the 4th circuit breaker S4, and the 4th circuit breaker S4 sends off-the-line block signal to the 5th circuit breaker L;
3) after the time delay of 1 second ~ 2 seconds, the second circuit breaker S2 carries out reclosing, owing to being transient fault, recovers normal power supply;
Four, when permanent fault point K1 is short-circuited fault, 1) the second circuit breaker S2 forwards the first circuit breaker S1 send a segment protect block signal, and the second circuit breaker S2 tripping operation, although now the first circuit breaker S1 also detects short circuit current, but because it receives a segment protect locking, therefore do not carry out trip operation;
2) the 3rd circuit breaker S3 sends off-the-line block signal to the 4th circuit breaker S4, and the 4th circuit breaker S4 sends off-the-line block signal to the 5th circuit breaker L;
3), after the time delay of 1 second ~ 2 seconds, the second circuit breaker S2 carries out reclosing, owing to being permanent fault, and Accelerated trip, unsuccessful reclosing, then the second circuit breaker S2 sends reconstruct block signal to the 3rd circuit breaker S3;
4) the 3rd circuit breaker S3 carries out off-the-line, due to the second circuit breaker S2 unsuccessful reclosing, in off-state, therefore isolated the fault zone between the second circuit breaker S2 and the 3rd circuit breaker S3;
5) main feeder automatization terminal FTU1 is according to the internal state of each common feed line automatization terminal, judgement supplier of electricity to, and to needing the common feed line automatization terminal of reconstruct to send reconstruction signal, in this example, by master control Intelligent feeder line automation terminal, to the 5th common feed line automatization terminal FTU5, send reconstruction signal, the 5th common feed line automatization terminal FTU5 controls the 5th circuit breaker L and closes a floodgate, and non-fault zone restores electricity.
Beneficial effect of the present invention: 1) can complete effective transmission, the monitoring of Distributing network structure and quick isolation and the recombination function of fault to feeder line real time data, and the relatively simple back-stage management machine of configuration, complete the corresponding function of system of original configuration main website and substation.2) make the independence of feed line automatization terminal FTU, the performances such as fail safe of the rapidity of failure removal, system are improved, simultaneously by the setting to the operational mode of Intelligent feeder line automation terminal FTU, make Intelligent feeder line automation terminal FTU based on high speed communication platform, not exclusively depend on again communication.
Accompanying drawing explanation
Accompanying drawing 1 is the arrangements of elements figure of feed line automatization terminal FTU of the present invention.
Accompanying drawing 2 is structural representations of feeder-terminal-unit.
Accompanying drawing 3 is that the present invention simulates generation feeder line transient fault control strategy figure.
Accompanying drawing 4 is that the present invention simulates generation feeder line permanent fault control strategy figure.
Accompanying drawing 5 is system principle logic diagrams.
S1 in figure is that circuit breaker, S2 are that circuit breaker, S3 are that circuit breaker, S4 are that circuit breaker, L are that circuit breaker is normal circuit breaker (prior art), and the function of L circuit breaker is interconnection switch, is normally open operation under normal operation.QF1, QF2 are feeder line outlet breakers.
Embodiment
Contrast Fig. 1, collection and the transmission of the complete paired transmission line real time data of feed line automatization terminal under circuit normal operating conditions; Feeder-terminal-unit, by the TCP/IP communications protocol of bottom, realize the real-time communication between feeder-terminal-unit, guarantee that each feed line automatization terminal FTU all can obtain the state information of other several feed line automatization terminal FTU, thereby realize supplier of electricity to judgement, the calculating of front and back node, for protecting strategy that corresponding Data support is provided;
Feed line automatization terminal comprises master control feed line automatization terminal FTU1, the second feed line automatization terminal FTU2, the 3rd feed line automatization terminal FTU3, the 4th feed line automatization terminal FTU4 and the 5th feed line automatization terminal FTU5; Described master control feed line automatization terminal FTU1 connects control the first circuit breaker S1, the second feed line automatization terminal FTU2 connects control the second circuit breaker S2, the 3rd feed line automatization terminal FTU3 connects control the 3rd circuit breaker S3, the 4th feed line automatization terminal FTU4 connects control the 4th circuit breaker S4, and the 5th feed line automatization terminal FTU5 connects control the 5th circuit breaker L;
Contrast accompanying drawing 2, described feeder-terminal-unit is to be responsible for the switching value of switchgear and the collections of measuring amount such as circuit breaker, after treatment, by communication protocol, report to higher level main website or substation, and control by the coordination between device, realize Fault Identification, fault location, the Fault Isolation of feeder line.
Feeder-terminal-unit can provide 1 loop line road (3 voltage 7 electric currents are wherein measured electric current, 3 protective currents, 1 zero-sequence current for 3) analog quantity, the collection of 2 DC quantity, the collection of 8 railway digital amounts, 2 tunnels to close minute control.Support ethernet communication and RS232/485 communication.Adopt box-hanging type structure, mainly by main control module, interface module, intelligent power, storage battery and cabinet etc., partly formed.The installation site of remaining communication module in casing, can be according to the different respective communication modules that are equipped with flexibly of telex network mode.
The selection of feed line automatization terminal FTU: because each feed line automatization terminal FTU all can obtain the state information of other several feed line automatization terminal FTU, so master control Intelligent feeder line automation terminal is changeable, the minimum automatic startup master control function of feed line automatization terminal numbering in the normal node of communication, become master control Intelligent feeder line automation terminal, the function of master control Intelligent feeder line automation terminal comprises the running status of monitoring every other common feed line automatization terminal, and the coordination of the postrun automatic reconfiguration of off-the-line occurs to cause due to fault in system;
Contrast Fig. 3, when feeder line breaks down, strategy is as follows:
When transient fault point K0 is short-circuited fault, 1) the second circuit breaker S2 forwards the first circuit breaker S1 send a segment protect block signal, and the second circuit breaker S2 tripping operation, although now the first circuit breaker S1 also detects short circuit current, but because it receives a segment protect locking, therefore do not carry out trip operation;
2) the 3rd circuit breaker S3 sends off-the-line block signal to the 4th circuit breaker S4, and the 4th circuit breaker S4 sends off-the-line block signal to the 5th circuit breaker L;
3) after the time delay of 1 second ~ 2 seconds, the second circuit breaker S2 carries out reclosing, owing to being transient fault, recovers normal power supply;
Contrast accompanying drawing 4, when feeder line generation permanent fault, strategy is as follows:
When permanent fault point K1 is short-circuited fault, 1) the second circuit breaker S2 forwards the first circuit breaker S1 send a segment protect block signal, and the second circuit breaker S2 tripping operation, although now the first circuit breaker S1 also detects short circuit current, but because it receives a segment protect locking, therefore do not carry out trip operation;
2) the 3rd circuit breaker S3 sends off-the-line block signal to the 4th circuit breaker S4, and the 4th circuit breaker S4 sends off-the-line block signal to the 5th circuit breaker L;
3), after the time delay of 1 second ~ 2 seconds, the second circuit breaker S2 carries out reclosing, owing to being permanent fault, and Accelerated trip, unsuccessful reclosing, then the second circuit breaker S2 sends reconstruct block signal to the 3rd circuit breaker S3;
4) the 3rd circuit breaker S3 carries out off-the-line, due to the second circuit breaker S2 unsuccessful reclosing, in off-state, therefore isolated the fault zone between the second circuit breaker S2 and the 3rd circuit breaker S3;
5) main feeder automatization terminal FTU1 is according to the internal state of each common feed line automatization terminal, judgement supplier of electricity to, and to needing the common feed line automatization terminal of reconstruct to send reconstruction signal, in this example, by master control Intelligent feeder line automation terminal, to the 5th common feed line automatization terminal FTU5, send reconstruction signal, the 5th common feed line automatization terminal FTU5 controls the 5th circuit breaker L and closes a floodgate, and non-fault zone restores electricity.
The interface of feed line automatization terminal FTU and circuit breaker comprises: the both sides of each circuit breaker respectively fill a PT(voltage transformer), a CT(current transformer of each circuit breaker configuration), these PT are connected with feed line automatization terminal FTU by aviation plug with CT, the holding wire the inside of aviation plug, comprised that feed line automatization terminal FTU controls the idle contact of circuit breaker folding, feed line automatization terminal FTU is by secondary voltage and the current value of AC sampling PT and CT.
Contrast Fig. 5, the course of work of system:
Common Intelligent feeder line automation terminal FTU internal network is realized intelligent control system, does not need transformer station's distribution substation and power distribution automation main station system to participate in, and just can autonomy realize the Fault Isolation of distribution and coincidence, fault recovery function.2) this method and scheduling and transformer station do not have direct correlation, reduce original department privilege conflict.
In main website, only need configure relatively simple back-stage management function common Intelligent feeder line automation terminal FTU is realized to configuration management, in the situation that not possessing distribution automation main station system, also can improve feeder automation level, therefore to possess installation and maintenance simple for native system, the feature of being convenient to promote the use of.
When being short-circuited fault, conventional feed line automatization system exports protection by feeder line, excision whole piece feeder line; Intelligent feeder line automation system is according to the communication between the Intelligent feeder line automation terminal FTU device of front and back, transformer station's outlet protection protection is in support failure to actuate, without whole piece circuit, excise, realize selectively excision faulty section, reduce to greatest extent power failure range, improve power supply reliability, thereby realized Intelligent feeder line automation system, can realize the selectivity of protection for feed line;
By the setting to the operational mode of common Intelligent feeder line automation terminal FTU, make Intelligent feeder line automation system based on high speed communication platform, not exclusively depend on again communication; Have in the situation of optical-fibre communications, can, by optical-fibre communications at a high speed, realize the selectivity of protection; When communicating interrupt or in without communication situation, Intelligent feeder line automation system can be degenerated to the conventional feed line automatization system of " voltage-time " type automatically, by time coordination, realizes the automatic recovery of fault; Thereby make system possess the feature of high reliability;
Due in the process restoring electricity, all that recovery policy (reconstruct) by preseting in master control Intelligent feeder line automation terminal FTU is recovered, do not need the cooperation of main website, substation, so greatly shorten recovery time, especially work as in the huge situation of power distribution network network; The system speed that restores electricity is accelerated.

Claims (4)

1. the distribution feeder protect and reconstruct method based on Intelligent feeder line automation terminal, is characterized in that the method comprises following processing method:
One, collection and the transmission of the complete paired transmission line real time data of feed line automatization terminal under circuit normal operating conditions; Feeder-terminal-unit, by the TCP/IP communications protocol of bottom, realize the real-time communication between feeder-terminal-unit, guarantee that each feed line automatization terminal FTU all can obtain the state information of other several feed line automatization terminals, thereby realize supplier of electricity to judgement, the calculating of front and back node, for protecting strategy that corresponding Data support is provided;
Two, the selection of feed line automatization terminal: because each feed line automatization terminal all can obtain the state information of other several feed line automatization terminals, so master control Intelligent feeder line automation terminal is changeable, the minimum automatic startup master control function of feed line automatization terminal numbering in the normal node of communication, become master control Intelligent feeder line automation terminal, the function of master control Intelligent feeder line automation terminal comprises the running status of monitoring every other common feed line automatization terminal, and the coordination of the postrun automatic reconfiguration of off-the-line occurs to cause due to fault in system;
Three,, when transient fault point (K0) is short-circuited fault, strategy is as follows:
1) the second circuit breaker forwards the first circuit breaker send a segment protect block signal, and the second circuit breaker (S2) tripping operation, although now the first circuit breaker also detects short circuit current, because it receives a segment protect locking, therefore do not carry out trip operation;
2) the 3rd circuit breaker sends off-the-line block signal to the 4th circuit breaker, and the 4th circuit breaker sends off-the-line block signal to the 5th circuit breaker;
3) after the time delay of 1 second ~ 2 seconds, the second circuit breaker carries out reclosing, owing to being transient fault, recovers normal power supply;
Four,, when permanent fault point (K1) is short-circuited fault, strategy is as follows:
1) the second circuit breaker forwards the first circuit breaker send a segment protect block signal, and the second circuit breaker (S2) tripping operation, although now the first circuit breaker also detects short circuit current, because it receives a segment protect locking, therefore do not carry out trip operation;
2) the 3rd circuit breaker sends off-the-line block signal to the 4th circuit breaker, and the 4th circuit breaker sends off-the-line block signal to the 5th circuit breaker;
3) after the time delay of 1 second ~ 2 seconds, the second circuit breaker carries out reclosing, owing to being permanent fault, and Accelerated trip, unsuccessful reclosing, then the second circuit breaker sends reconstruct block signal to the 3rd circuit breaker;
4) the 3rd circuit breaker carries out off-the-line, due to the second circuit breaker unsuccessful reclosing, in off-state, therefore isolated the fault zone between the second circuit breaker and the 3rd circuit breaker;
5) main feeder automatization terminal is according to the internal state of each common feed line automatization terminal, judgement supplier of electricity to, and to needing the common feed line automatization terminal of reconstruct to send reconstruction signal, by master control Intelligent feeder line automation terminal, to the 5th common feed line automatization terminal, send reconstruction signal, the 5th common feed line automatization terminal is controlled the 5th breaker closing, and non-fault zone restores electricity.
2. the distribution feeder protect and reconstruct method based on Intelligent feeder line automation terminal according to claim 1, is characterized in that described feed line automatization terminal comprises master control feed line automatization terminal, the second feed line automatization terminal, the 3rd feed line automatization terminal, the 4th feed line automatization terminal and the 5th feed line automatization terminal; Wherein master control feed line automatization terminal connects control the first circuit breaker, the second feed line automatization terminal connects controls the second circuit breaker, the 3rd feed line automatization terminal connects controls the 3rd circuit breaker, the 4th feed line automatization terminal connects controls the 4th circuit breaker, and the 5th feed line automatization terminal connects controls the 5th circuit breaker.
3. the distribution feeder protect and reconstruct method based on Intelligent feeder line automation terminal according to claim 2, is characterized in that the first circuit breaker, the second circuit breaker, the 3rd circuit breaker, the 4th circuit breaker, the 5th circuit breaker are arranged between the first feeder line outlet breaker and the second feeder line outlet breaker successively.
4. the distribution feeder protect and reconstruct method based on Intelligent feeder line automation terminal according to claim 3, is characterized in that the first feeder line outlet breaker and the second feeder line outlet breaker are arranged in transformer station.
CN201210193399.0A 2012-06-13 2012-06-13 Power distribution network feeder protection and reconfiguration scheme based on intelligent feeder terminal unit CN102710022B (en)

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CN102882278A (en) * 2012-10-12 2013-01-16 上海晟东电力科技有限公司 Intelligent distribution type feeder automation control system
CN104182815B (en) * 2012-10-22 2017-04-05 国网山东省电力公司青岛供电公司 A kind of power supply reliability acquisition methods and system
CN103227460A (en) * 2013-04-27 2013-07-31 上海致达智利达系统控制有限责任公司 Intelligent power distribution monitoring system and intelligent power distribution monitoring method
CN103915825B (en) * 2014-03-20 2016-09-28 广州南方电力集团科技发展有限公司 Distribution network failure automatic decision that full load switch ring main unit is powered and control method
CN103944153A (en) * 2014-04-25 2014-07-23 湖南大学 Self-adaption intelligent protection method for power distribution network applied to high-permeability distributed power supply
CN104184134B (en) * 2014-09-03 2017-11-24 广西电网公司电力科学研究院 The two-way latch-up protection method of distribution line based on main website decision discernment
CN105429116A (en) * 2015-12-31 2016-03-23 祥云供电有限公司 Fast FTU device adopting wireless communication
CN108169625A (en) * 2017-12-28 2018-06-15 国网江苏省电力有限公司南京供电分公司 A kind of distribution feed line automatization terminal and distribution line failure localization method

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CN101534001B (en) * 2008-03-11 2011-11-23 杨万钟 Method for detecting distribution network short circuit fault and restoring power supply in non-broken-down section
US20110115308A1 (en) * 2008-07-21 2011-05-19 Zhao Wang Feeder automation system and method for operating the same
CN101867223A (en) * 2010-04-08 2010-10-20 浙江省电力试验研究院 Automatic system fault handling method of distribution network containing a plurality of distributed power supplies
CN102270881A (en) * 2011-07-29 2011-12-07 南京因泰莱配电自动化设备有限公司 Reconfigurable feeder terminal system

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