CN201893540U - Intelligent radio network dispatching digital-type boundary controller complete equipment - Google Patents

Intelligent radio network dispatching digital-type boundary controller complete equipment Download PDF

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Publication number
CN201893540U
CN201893540U CN 201020627133 CN201020627133U CN201893540U CN 201893540 U CN201893540 U CN 201893540U CN 201020627133 CN201020627133 CN 201020627133 CN 201020627133 U CN201020627133 U CN 201020627133U CN 201893540 U CN201893540 U CN 201893540U
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China
Prior art keywords
digital
breaker
signal
module
equipment
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Expired - Fee Related
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CN 201020627133
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Chinese (zh)
Inventor
吕红伟
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Nanning China Is For Power Tech Corp Inc
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Nanning China Is For Power Tech Corp Inc
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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
    • 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
    • Y04S40/00Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/126Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
    • Y04S40/127

Abstract

The utility model discloses intelligent radio network dispatching digital-type boundary controller complete equipment, which comprises a circuit breaker main body, a microcomputer protection measuring and controlling unit, a voltage transformer and a connecting plug-in unit; the microcomputer protection measuring and controlling unit comprises a data collecting module, a control order output module, a central processor and a global system for mobile communication (GSM) communication module. The complete equipment has quick-break protection, over-current protection and time-limited quick-break protection; quadratic calculus is used for processing signals such as opening voltage, zero-sequence current and the like so as to effectively solve the grounding problem; three-time re-closing can be set; a display screen is equipped so as to conveniently examine the failure; the complete equipment can be joined with a mobile phone or the Internet to remotely edit orders, set parameters, remotely control the opening and closing of a switch, inquire statuses and event records, and the like, and the complete equipment can also be connected with an electric power management backstage machine through the communication of a short message so as to realize the man-machine conversation; and through the sequential coordination of fixed values, the interphase short-circuit failure at the user side can be automatically isolated, the grounding failure can be automatically removed, and the failure current can be disconnected, so the automatic dispatching can be realized, and the following modification fund can be saved.

Description

The digital boundary controller of intelligent radio dispatching of power netwoks the complete sets of equipment
Technical field
The utility model relates to electric power system distribution automation technical field, the specifically a kind of digital boundary controller of intelligent radio dispatching of power netwoks the complete sets of equipment of realizing feeder automation.
Background technology
Along with the proposition of intelligent grid plan, the year two thousand twenty builds up the target that " strong intelligent grid " becomes China's electric power system power grid construction.The proposition of intelligent grid needs extensive use advanced person's equipment and technology, greatly improves the performance of electrical power trans mission/distribution system.Realize that distribution network automated is a key of intelligent grid.Be the fail safe of raising and assurance supply line, reliability, and to circuit implementation monitoring in real time, intelligent distribution protection equipment plays a part very important.
China's 10KV line construction is various, and security reliability is poor, the accident pilosity, and accident is searched difficulty, and the branch line fault has seriously influenced the power distribution network safe operation.According to the interrelated data statistics, the failure rate of overhead transmission line accounts for about 70% of backbone fault ratio.How to isolate sole user's fault fast, and do not cause backbone whole piece circuit power outage to take place, and realize that monitoring in real time becomes the important topic of present distribution network system.Solution at present is because of sole user's accident and protect mismate to involve the method that the whole piece feeder line has a power failure, and related art scheme mainly contains Chinese patent ZL200820051909.X " user demarcation circuit breaker complete set of equipments ".Its deficiency is: the having high input of (1) Switch main body, and what use is the gas isolated vacuum switch of SF6, and SF6 gas is one of public hazards gas; (2) measurement and control unit can not be realized both-way communication, for realization monitoring in real time and quick isolated fault certain limitation is arranged, and realize that as desire this target needs input bigger on the basis of this patent, is unfavorable for extensive use; (3) have only quick-break, overcurrent two segment protects, single shot reclosing can only be set, be unfavorable for parameter and function corresponding being set according to the circuit situation; (4) do not establish display unit on the device, can not check line fault easily.
The utility model content
The purpose of this utility model; be promptly to provide that a cover cost is low, high efficiency, can realize the digital boundary controller of the intelligent radio dispatching of power netwoks the complete sets of equipment of feeder automation well; realizing the selectivity of power distribution protection, and can be with Fault Identification, Fault Isolation, reclosing, the recovery fault is disposable finishes.
The digital boundary controller of the utility model intelligent radio dispatching of power netwoks the complete sets of equipment, include breaker body, digital relay and monitoring unit, voltage transformer, and, described breaker body is connected bound cell with voltage transformer with the cable that described digital relay and monitoring unit links to each other; Described cable connects bound cell can include aviation plug-in unit and control cable;
Described breaker body includes the integrated instrument transformer of circuit breaker and protection and zero-sequence current; The input of described circuit breaker is connected with the service-wire power supply, and its output is connected with the input of customer charge side supply and distribution network; The end of incoming cables of described protection and the integrated instrument transformer of zero-sequence current connects the output of described circuit breaker, and its leading-out terminal connects the input of digital relay and monitoring unit by cable; A side joint service-wire power supply of described voltage transformer, its secondary side is connected with described digital relay and monitoring unit by cable;
Described digital relay and monitoring unit includes central processing unit and passes through coupled data acquisition module, control command output module, the gsm module of data/address bus:
Described data acquisition module, its signal input part connects the output that bound cell connects integrated instrument transformer of described circuit breaker, protection and zero-sequence current and voltage transformer by described cable, the signal data that is collected exports described central processing unit to after the internal digital signal processing circuit is handled; Described signal data includes but not limited to electric current, the voltage signal of breaker body and voltage transformer output, the circuit-breaker switching on-off signal, and position of the switch analog signals, the energy storage status signal, and, the one or more data messages in the zero sequence current signal; When described voltage transformer adopts threephase potential transformer, also can provide the opening voltage signal, as the foundation of judging earth fault to described digital relay and monitoring unit; In the described digital signal processing circuit, preferably including to adopt has secondary calculus circuit, by gathering signals such as opening voltage, zero-sequence current, solves the observing and controlling problem of small current neutral grounding effectively.
Described central processing unit, its signal input part links to each other with the output of described data acquisition module, its signal output part is through amplifying the input that buffer circuit is connected to described control command output module, different line current voltage signals, opening voltage signal, the zero sequence current signal that can send according to described data acquisition module, through amplifying buffer circuit, send different branch, combined floodgate control command to described control command output module; The current and voltage signals that described data acquisition module sends, opening voltage signal, zero sequence current signal, according to those of ordinary skills' general knowledge, can provide to include overcurrent, phase fault, single-phase earthing, quick-break in limited time, quick-break, time limit selection, reclosing, closing locking in interior various faults information;
The output of described control command output module connects bound cell by described cable and is connected to described breaker body, is used for sending branch, combined floodgate control command from described central processing unit to described breaker body;
Described gsm module links to each other with described central processing unit by communication interface, also links to each other with the mobile phone of appointment by wireless network, is used to receive branch, the control command of closing a floodgate of described central processing unit and sends to the mobile phone of appointment; And/or, be used to receive the mobile phone edit instruction of setting and send described central processing unit to, perhaps, and the electrical management background computer.
As the improvement to the digital boundary controller of above-mentioned intelligent radio dispatching of power netwoks the complete sets of equipment, described digital relay and monitoring unit also includes input panel and display module; Described input panel and display module link to each other with described central processing unit by data/address bus.Described display module can adopt large-screen Chinesizing LCDs, and man-machine interface contains much information, and conveniently checks fault; The data that deal of described central processing unit can be seen good linearty by the oscilloscope detecting instrument, have guaranteed data stability.
Further, described central processing unit, according to different current and voltage signals, opening voltage signal, the zero sequence current signal that described data acquisition module sends over and the process amplification is isolated, also can in the definite value scope, distinguish failure condition, send corresponding branch, combined floodgate control command to described control command output module again according to the definite value that described input panel is set.
As the improvement to the digital boundary controller of above-mentioned intelligent radio dispatching of power netwoks the complete sets of equipment, described digital relay and monitoring unit also includes energy storage and output module; Described energy storage and output module include storage battery and charging storage circuit thereof, its input is connected to the secondary side of described voltage transformer to obtain power supply and working power by a voltage conversion circuit, its output is connected to described control command output module by inversion module.For example, described data acquisition module can connect the input of threephase potential transformer A, B, C phase by it, to described energy storage and output module output AC220V signal, with power supply and the charging thereof that is used for energy storage and output module.
The operating principle and the course of work of the digital boundary controller of above-mentioned intelligent radio dispatching of power netwoks the complete sets of equipment are:
Described data acquisition module collects the integrated instrument transformer of current/voltage, protection and zero-sequence current of mains side input in real time and the output signal of threephase potential transformer comprises protective current, zero-sequence current, each phase voltage, opening voltage signal, carries out sending central processing unit to by data/address bus after secondary calculus is handled through the internal digital signal processing circuit; Central processing unit relatively carries out quick-break, overcurrent, in limited time quick-break, time limit zero-sequence current fault distinguishing to the signal data that the data acquisition module collects through computing according to the definite value of input panel input, reach the differentiation of zero-sequence current, opening voltage earth fault, send corresponding branch, combined floodgate control command to described control command output module, automatically eliminate the instantaneous time fault, the excision permanent fault.Thereby, on feeder line, in the distribution, when breaking down on the circuit of the digital boundary controller of intelligent radio dispatching of power netwoks the complete sets of equipment the place ahead, can prevent the unnecessary action of subordinate's intelligent radio dispatching of power netwoks digital boundary controller the complete sets of equipment; To the fault on the next stage circuit, the digital boundary controller of higher level's intelligent radio dispatching of power netwoks the complete sets of equipment can be realized the fault section isolation under the situation of not disjunction.
In addition; solving in the cooperating of ground protection and transformer station outlet definite value; the definite value of input panel input is designed to match operate time with transformer station outlet protection reclosing; after inlet wire side user power supply produces the transient fault protection; central processing unit is according to the zero-sequence current of data collecting module collected; the definite value of opening voltage signal and input panel input compares; central processing unit arrives the control command output module by amplifying the isolating door circuit with message transmission; the control command output module sends branch or reclosing command to breaker body; circuit breaker is received the instruction back automatically; disconnect fast, the time coincidence of setting according to input panel restores electricity.Simultaneously, central processing unit is transferred to fault message on the cell-phone number of setting by gsm module, also can be transferred on the background computer at electrical management center by communication interface such as RS485 simultaneously.
By being equipped with energy storage and output module, these the complete sets of equipment also can have power autonomous, and provide circuit breaker to use by inversion; When adding configuration GSM communication module; more can realize wireless telecommunications; information is docked with mobile phone or the Internet, and the mode edit operation order that the digital relay and monitoring unit can SMS can be carried out parameter tuning, remote control switch deciliter, inquiry on off state, query event record etc. easily.
According to technique scheme and analyze as can be known; the digital boundary controller of this intelligent radio dispatching of power netwoks the complete sets of equipment are by its digital relay and monitoring unit; can gather the primary current voltage signal quick, complete from integrated instrument transformer of circuit breaker, protection and zero-sequence current and threephase potential transformer, exactly and zero sequence current signal, opening voltage signal, protective current signal and voltage signal are carried out data processing; the fast shut-off faulty line is eliminated transient fault, also can realize by wireless telecommunications distant place circuit being monitored in real time.
For being fit to full outwork, the above-mentioned digital boundary controller of intelligent radio dispatching of power netwoks the complete sets of equipment also can adopt complete outdoor technological design, the outer high pressure vacuum demarcation circuit breaker of described breaker body selectable user this moment.
With respect to prior art, the digital boundary controller of the utility model intelligent radio dispatching of power netwoks the complete sets of equipment have following tangible advantage:
1, can disposable fast processing fault, under the situation that does not influence non-fault section, fault coverage is shortened to minimum zone, further improve power supply reliability; Excise fault fast, because fault clearing time is very short, for the not influence of the quality of power supply of most motor type loads; Handling failure is isolated simultaneously.Thereby, can realize the selectivity protected, with Fault Identification, Fault Isolation, reclosing, the recovery fault is disposable finishes.
2, the fault measure and control device on the feeder line can be advanced to failure monitoring on the circuit under the situation of the distribution substation of being failure to actuate, distribution main website layer, takes the lead in eliminating transient fault or isolates permanent fault, and solve problem with grounding effectively; Can excise single phase ground fault automatically, disconnect phase fault, quick fault location point, supervisory user load.
3, device carries communication module, by the GSM both-way communication, can solve and fault upload with the fastest speed of minimum cost.Equipment also can be reserved with the RS485 communication interface.By wireless telecommunications, need not to spread cable, realize the dispatching automation one-time investment.Save the follow-up fund and the input of workload.
4, be equipped with display unit, be convenient to check line fault.
5, be fit to full outwork, can realize full dispatching automation, and save follow-up betterment capital.
Description of drawings
Fig. 1 is the hardware system theory of constitution block diagram of an embodiment of the digital boundary controller of the utility model intelligent radio dispatching of power netwoks the complete sets of equipment.
Fig. 2 is the outdoor control cable wiring schematic diagram of an embodiment of the digital boundary controller of the utility model intelligent radio dispatching of power netwoks the complete sets of equipment.
Embodiment
Below in conjunction with drawings and Examples the digital boundary controller of the utility model intelligent radio dispatching of power netwoks the complete sets of equipment are further described.
As shown in Figure 1, the digital boundary controller of the utility model intelligent radio dispatching of power netwoks the complete sets of equipment mainly are made up of voltage transformer 3, breaker body 2, digital relay and monitoring unit 1 and cable connection bound cell 4 four major parts:
The service-wire mains side connects threephase potential transformer 3, and is connected with breaker body 2; Cable connects each aviation plug-in unit that bound cell 4 comprises outdoor control cable and two ends thereof; be connected with breaker body 2, voltage transformer 3, digital relay and monitoring unit 1 respectively, with the transmission of the data between assurance circuit breaker 2, voltage transformer 3 and the digital relay and monitoring unit 1, instruction, energy.
Demarcation circuit breaker body 2 includes the integrated instrument transformer 6 of circuit breaker 5, protection and zero-sequence current.Circuit breaker 2 can adopt outdoor high-voltage vacuum demarcation circuit breaker ZW32-12F/630-20, does not have oil, no SF6, environmental protection, no explosion hazard.
The voltage transformer 3 that present embodiment adopts is threephase potential transformers; can adopt common three-phase high-voltage voltage instrument transformer; be connected in parallel between the three-phase of service-wire power supply, the secondary output of threephase potential transformer 3 is connected with data acquisition module 7 in the digital relay and monitoring unit 1 respectively by outdoor control cable.
As shown in Figure 1; digital relay and monitoring unit 1 is made up of data acquisition module 7, control command output module 9, central processor CPU 8, man-machine interface (GSM communication module) 11, energy storage and output module (containing storage battery) 13, inversion module 14, input panel 10, LCD MODULE 15 and relevant accessory circuit, can be installed on outdoor high-voltage demarcation circuit breaker body 2 and threephase potential transformer 3 bottoms with bar.
As shown in Figure 2, the data acquisition module 7 of described digital relay and monitoring unit 1, include branch, close a floodgate, three-phase current, voltage signal, the opening voltage signal, the zero sequence current signal input, by described connection plug connector unit 4 respectively with the circuit breaker 5 of described breaker body 2, protection and the integrated instrument transformer 6 of zero-sequence current and threephase potential transformer 3 are electrically connected, collect the current/voltage input of service-wire mains side in real time, protection and the incorporate instrument transformer 6 of zero-sequence current and threephase potential transformer 3 output A, B, the C phase current, zero-sequence current, A, B, the C phase voltage, the opening voltage signal is after the internal digital signal processing circuit is carried out the processing of secondary calculus, to the above-mentioned signal of described central processing unit 8 outputs;
Described central processing unit 8, the different current and voltage signals that sends according to described data acquisition module 7, the opening voltage signal, zero sequence current signal, through amplifying buffer circuit, quick-break is relatively carried out in the signal data computing of the input that the definite value of setting according to input panel 10 collects data acquisition module 7 in the definite value scope, overcurrent, quick-break in limited time, time limit zero-sequence current fault distinguishing, and zero-sequence current, the differentiation of opening voltage earth fault, send corresponding the branch to described control command output module 9, the combined floodgate control command, control the branch of described breaker body 2, close a floodgate, with automatic elimination instantaneous time fault, the excision permanent fault.
Thereby, on feeder line, in the distribution, when breaking down on the circuit of the digital boundary controller of intelligent radio dispatching of power netwoks the complete sets of equipment the place ahead, can prevent the unnecessary action of subordinate's intelligent radio dispatching of power netwoks digital boundary controller the complete sets of equipment; To the fault on the next stage circuit, the digital boundary controller of higher level's intelligent radio dispatching of power netwoks the complete sets of equipment can be realized the fault section isolation under the situation of not disjunction.Solving in the cooperating of ground protection and transformer station outlet definite value; the definite value of input panel 10 inputs; should match operate time with transformer station's outlet protection reclosing; after inlet wire side user power supply produces the transient fault protection; the zero-sequence current that central processing unit 8 is gathered according to data acquisition module 7; after the definite value of opening voltage signal and input panel 10 inputs compares; central processing unit 8 arrives control command output module 9 by amplifying the isolating door circuit board with message transmission; control command output module 9 sends branch or reclosing command to breaker body 2; circuit breaker 2 is received the instruction back automatically; disconnect fast, the time coincidence of setting according to input panel restores electricity.Central processing unit 8 also can be transferred to fault message on the cell-phone number of setting by gsm module, can be transferred on the background computer at electrical management center by the RS485 interface simultaneously.

Claims (10)

1. the digital boundary controller of intelligent radio dispatching of power netwoks the complete sets of equipment, include breaker body (2), digital relay and monitoring unit (1), voltage transformer (3), and, described breaker body (2) is connected bound cell (4) with voltage transformer (3) with the cable that described digital relay and monitoring unit (1) links to each other;
Described breaker body (2) includes circuit breaker (5) and protection and the integrated instrument transformer of zero-sequence current (6); The input of described circuit breaker (5) is connected with the service-wire power supply, and its output is connected with the input of customer charge side supply and distribution network; The end of incoming cables of the integrated instrument transformer of described protection and zero-sequence current (6) connects the output of described circuit breaker (5), and its leading-out terminal connects the input of digital relay and monitoring unit (1) by cable;
A side joint service-wire power supply of described voltage transformer (3), its secondary side is connected with described digital relay and monitoring unit (1) by cable;
It is characterized in that:
Described digital relay and monitoring unit (1) includes central processing unit (8) and passes through coupled data acquisition module (7), control command output module (9), the gsm module (11) of data/address bus;
Described data acquisition module (7), its signal input part connects the output that bound cell (4) connects described circuit breaker (5), protection and the integrated instrument transformer of zero-sequence current (6) and voltage transformer (3) by described cable, the signal data that is collected exports described central processing unit (8) to after the internal digital signal processing circuit is handled; Described signal data includes but not limited to electric current, the voltage signal of breaker body (2) and voltage transformer (3) output, the circuit-breaker switching on-off signal, position of the switch analog signals, energy storage status signal, and, the one or more data messages in the zero sequence current signal;
Described central processing unit (8), its signal input part links to each other with the output of described data acquisition module (7), and its signal output part is through amplifying the input that buffer circuit is connected to described control command output module (9);
The output of described control command output module (9) connects bound cell (4) by described cable and is connected to described breaker body (2);
Described gsm module (11) links to each other with described central processing unit (8) by communication interface, also links to each other with the mobile phone of appointment by wireless network.
2. the digital boundary controller of intelligent radio dispatching of power netwoks according to claim 1 the complete sets of equipment is characterized in that: described voltage transformer (3) is a threephase potential transformer.
3. the digital boundary controller of intelligent radio dispatching of power netwoks according to claim 1 and 2 the complete sets of equipment is characterized in that: described digital relay and monitoring unit (1) also includes energy storage and output module (13); Described energy storage and output module (13) include storage battery and charging storage circuit thereof, its input is connected to the secondary side of described voltage transformer (3) by voltage conversion circuit (16), and its output is connected to described control command output module (9) by inversion module (14).
4. the digital boundary controller of intelligent radio dispatching of power netwoks according to claim 1 and 2 the complete sets of equipment is characterized in that: described digital relay and monitoring unit (1) also includes input panel (10) and display module (15); Described input panel (10) and display module (15) link to each other with described central processing unit (8) by data/address bus.
5. the digital boundary controller of intelligent radio dispatching of power netwoks according to claim 4 the complete sets of equipment, it is characterized in that: described central processing unit (8), according to different current and voltage signals, opening voltage signal, the zero sequence current signal that described data acquisition module (7) sends over and the process amplification is isolated, in the definite value scope, distinguish failure condition according to the definite value that described input panel (10) is set, send branch, combined floodgate control command accordingly to described control command output module (9) again.
6. the digital boundary controller of intelligent radio dispatching of power netwoks according to claim 1 and 2 the complete sets of equipment is characterized in that: described breaker body (2) adopts the outdoor high-voltage vacuum demarcation circuit breaker.
7. the digital boundary controller of intelligent radio dispatching of power netwoks according to claim 3 the complete sets of equipment is characterized in that: described breaker body (2) adopts the outdoor high-voltage vacuum demarcation circuit breaker.
8. the digital boundary controller of intelligent radio dispatching of power netwoks according to claim 1 and 2 the complete sets of equipment is characterized in that: described cable connects bound cell (4) and includes aviation plug-in unit and control cable.
9. the digital boundary controller of intelligent radio dispatching of power netwoks according to claim 1 and 2 the complete sets of equipment is characterized in that: described central processing unit (8) also is connected to the electrical management background computer by communication interface (12).
10. the digital boundary controller of intelligent radio dispatching of power netwoks according to claim 1 and 2 the complete sets of equipment is characterized in that: in the digital signal processing circuit of described data acquisition module (7), comprise adopting that secondary calculus circuit is arranged.
CN 201020627133 2010-11-26 2010-11-26 Intelligent radio network dispatching digital-type boundary controller complete equipment Expired - Fee Related CN201893540U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103746354A (en) * 2012-05-25 2014-04-23 南京国网电瑞继保科技有限公司 Distribution network fault isolation method based on transformer substation overcurrent protection
CN104283307A (en) * 2014-10-29 2015-01-14 国家电网公司 Intelligent operation and power distribution integrated high-voltage switch
CN104377828A (en) * 2014-11-24 2015-02-25 国网辽宁省电力有限公司锦州供电公司 Uniform adjusting method for protective function of breaker
CN104410156A (en) * 2014-11-12 2015-03-11 江苏东源电器集团股份有限公司 Intelligent outdoor separator
CN108872843A (en) * 2018-06-14 2018-11-23 国网湖北省电力有限公司电力科学研究院 A kind of one or two fusion measurement methods of 10kV pole-mounted circuit breaker protection feature

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103746354A (en) * 2012-05-25 2014-04-23 南京国网电瑞继保科技有限公司 Distribution network fault isolation method based on transformer substation overcurrent protection
CN103746354B (en) * 2012-05-25 2017-03-08 南京国网电瑞继保科技股份有限公司 One kind is based on transformer station's overcurrent protection method for isolating power distribution network fault without constant time lag in
CN104283307A (en) * 2014-10-29 2015-01-14 国家电网公司 Intelligent operation and power distribution integrated high-voltage switch
CN104283307B (en) * 2014-10-29 2016-09-14 国家电网公司 Integrated high-pressure switch is joined by intelligence battalion
CN104410156A (en) * 2014-11-12 2015-03-11 江苏东源电器集团股份有限公司 Intelligent outdoor separator
CN104377828A (en) * 2014-11-24 2015-02-25 国网辽宁省电力有限公司锦州供电公司 Uniform adjusting method for protective function of breaker
CN108872843A (en) * 2018-06-14 2018-11-23 国网湖北省电力有限公司电力科学研究院 A kind of one or two fusion measurement methods of 10kV pole-mounted circuit breaker protection feature

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Granted publication date: 20110706

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