CN107302263A - Self-healing property distributed intelligent control system - Google Patents

Self-healing property distributed intelligent control system Download PDF

Info

Publication number
CN107302263A
CN107302263A CN201710345483.2A CN201710345483A CN107302263A CN 107302263 A CN107302263 A CN 107302263A CN 201710345483 A CN201710345483 A CN 201710345483A CN 107302263 A CN107302263 A CN 107302263A
Authority
CN
China
Prior art keywords
control system
voltage
self
monitoring system
healing property
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710345483.2A
Other languages
Chinese (zh)
Inventor
罗伟文
黎锦棠
赖浩强
冯树林
罗汉昌
熊育民
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dongguan Power Supply Bureau of Guangdong Power Grid Co Ltd
Original Assignee
Dongguan Power Supply Bureau of Guangdong Power Grid Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dongguan Power Supply Bureau of Guangdong Power Grid Co Ltd filed Critical Dongguan Power Supply Bureau of Guangdong Power Grid Co Ltd
Priority to CN201710345483.2A priority Critical patent/CN107302263A/en
Publication of CN107302263A publication Critical patent/CN107302263A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/0006Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network for single frequency AC networks
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08Locating faults in cables, transmission lines, or networks
    • G01R31/081Locating faults in cables, transmission lines, or networks according to type of conductors
    • G01R31/086Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
    • 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
    • Y04S10/50Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
    • Y04S10/52Outage or fault management, e.g. fault detection or location

Abstract

The invention discloses self-healing property distributed intelligent control system, mainly include fault monitoring system, break-make path control system, information feedback system, line load current monitoring system, power transmission and transformation control system, fault monitoring system can timely and effectively detect which specific section circuit goes wrong, there is any problem, and shown in information feedback system, send a signal to break-make path control system simultaneously, it is that breaker disconnects to send instruction by the system again, line load current monitoring system can calculate real load in circuit, the maximization of power transmission efficiency is realized by power transmission and transformation control system.It is an advantage of the invention that:Judged by the DC voltage that generation is sensed to annular overhead transmission line, specifically which section failure can be judged faster, there is any failure, with very high practicality, the time for saving fault location and fixing a breakdown, power supply is rationalized while can be realized according to the load in power network.

Description

Self-healing property distributed intelligent control system
Technical field
The distribution network automated field of present invention design, more particularly to a kind of self-healing property distributed intelligent control system.
Background technology
Power transmission is the important embodiment of power transmission quality safely, and the power transmission lines such as overhead transmission line is alternate short Road failure and singlephase earth fault cause safely immense pressure to power transmission.
In the current low-carbon economy epoch, as the new energy such as solar energy, wind energy access power distribution network, conventional electrical distribution net has been overturned The feature of unidirectional trend, conventional electrical distribution net relay protection is more difficult to determine fault section.
American plan completed intelligent distribution network engineering IDG (Intelli-D-Grid) in 10~20 years.Intelligent power distribution Net (Intelli-D-Grid) will be automatically performed:Network reconfiguration;Voltage and idle control;Fault location and isolation (stops to reduction Electric temporal meaning is very big);Functions such as (RPR) is adjusted in (when system topology changes) relay protection again;Complete intelligence Change the foundation of power network:Digital transformer substation, distribution generation technology, Power Electronic Technique and power distribution network interconnection, fuels sources and energy storage, Electric power networks, semiconductor, superconduction, ultracapacitor, magnetic material and the insulator of matching, energy-storage system, the intelligence biography of low cost The application of sensor, complete intelligent power distribution net is constituted during by network service, synchronous couple of GPS.Though it is external distribution network automated So start to walk early, have a wide range of application, maturity is high, but there are no the report of power distribution network networking protection than China.
The domestic protection for power distribution network, the protection act mainly exported by substation feeder cuts off failure, this Mode of operation has two problems:1st, power failure range is expanded, power supply reliability is reduced;2nd, need to set substation in transformer station, For coordinating the relation between a plurality of feeder line so that safeguard relative complex.This pattern, be also current main flow face protection match somebody with somebody Put thinking.
Therefore, when failure occurs, the timely repairing of electric power first-aid personnel is particularly important.Due to power supply overhead transmission line The geographic range being related to is very wide, therefore, when failure occurs, and electric power first-aid personnel are difficult with quickly positioning failure in a short time Point, so can know that the specific spot of accident is just not busy particularly important in the short time when failure occurs.Sometimes simultaneously Some regional needs for electricity are especially high, and if some regional needs for electricity then relatively, if the defeated change in power transmission path Voltage keeps constant, then electric energy cannot be utilized sufficiently.
The content of the invention
It is an object of the invention to provide a kind of self-healing property distributed intelligent control system, to solve in above-mentioned background technology The problem of proposition.
To achieve the above object, the present invention provides following technical scheme:Including fault monitoring system, break-make road control system System, information feedback system, the fault monitoring system are capable of detecting when on loop grid to be specifically which section breaks down, and will This signal is delivered to break-make path control system, information feedback system, and the break-make path control system is according to fault monitoring system Output signal judges the overhead line breaker that need to be disconnected, and sending signal acts specific executing agency;Information feedback system The signal that fault monitoring system is exported can be shown.
It is preferred that, described fault monitoring system includes voltage processing module, failure analysis module and current detection module;
The voltage processing module is handled the alternating voltage of looped network alternating current circuit, is by alternating current circuit voltage conversion DC voltage, and it is delivered to failure analysis module;
Alternating current circuit is converted into DC voltage by the current detection module by the secondary current of coil-induced generation, and It is delivered to failure analysis module;
Whether the failure analysis module is 0 to judge whether instead to give birth to failure according to the input voltage of voltage processing module;If Input voltage does not change, then the circuit is normal, if input voltage is changed into 0, the circuit is problematic;
Whether the DC voltage that the failure analysis module is inputted according to current detection module is that earth fault occurs for 0 judgement Or short trouble;On the premise of the output valve of voltage processing module is 0, if being 0 in input voltage, the line short is no It is then earth fault.
It is preferred that, described voltage processing module, current detection module are arranged on looped network circuit scene, and its quantity is according to existing Depending on the power system segments of field, voltage processing module, a current detection module are respectively installed on each disjunction circuit.
It is preferred that, the voltage processing module includes diode D1, electric capacity C1, electric capacity C2, resistance R1 and resistance R2, its In, diode D1 anode connects sensed AC line voltage Vin, the one end of diode D1 negative electrode respectively with resistance R1 Connected with electric capacity C1 one end, one end, resistance R2 one end and the direct current of the resistance R1 other end respectively with electric capacity C2 Voltage is connected, and the other end of the electric capacity C1 other end, the electric capacity C2 other end and resistance R2 is grounded respectively.
It is preferred that, the current detection module includes full wave rectifying unit and filtering partial pressure unit.
It is preferred that, between the fault monitoring system and information feedback system, break-make path control system and feedback of the information system Fiber optic communication or wireless communication can be used between system.
It is preferred that, between the fault monitoring system and information feedback system, break-make path control system and feedback of the information system Fiber optic communication is used between system.
It is preferred that, described information reponse system is also equipped with an alarm and a flash lamp.
It is preferred that, described self-healing property distributed intelligent control system also includes line load current monitoring system, described The input of line load current monitoring system is connected with the output end of voltage processing module, the output end of current detection module, Its output end is connected with the input of information feedback system;
The principle of the line load current monitoring system is:Magnitude of voltage, the electric current inputted according to voltage processing module is examined The current value of module input is surveyed, the online real load of the segmented line is calculated by program set in advance.
It is preferred that, described self-healing property distributed intelligent control system also includes power transmission and transformation control system, its input It is connected with the output end of line load current monitoring system, by contrasting the real load of every section of segmentation gauze, provides operation letter Number to transformer station, the power transmission and transformation pressure in the sectionalized line is lifted.
Compared with prior art, the beneficial effects of the invention are as follows:By the direct current that generation is sensed to annular overhead transmission line Voltage is judged, specifically which section failure can be judged faster, while the direct current produced further according to sensing Stream and mutation current comprehensive descision go out to generate earth fault or short trouble, with very high practicality, save simultaneously Fault location and the time fixed a breakdown, after field failure is released, repair personnel is according to line load current monitoring system The circuit real load provided judges whether suitable reclosing, and the system can also be by the line load that detects in real time, in real time Change the power transmission and transformation pressure in power transmission path.
Brief description of the drawings
Fig. 1 is the cardinal principle figure of self-healing property distributed intelligent control system of the present invention;
Fig. 2 is the circuit diagram of the voltage processing module of the present invention;
In figure:1- fault monitoring systems;11- voltage processing modules;12- failure analysis modules;13- current detection modules; 131- full wave rectifying units;132- filters partial pressure unit;2- break-make path control systems;3- information feedback systems;4- line loads Current monitoring system;5- power transmission and transformation control systems.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made Embodiment, belongs to the scope of protection of the invention.
It should be noted that overhead transmission line failure can be divided into short trouble and earth fault in most cases, either what It is 0 to plant the voltage at failure, the ring main unit of annular power network;According to electromagnetic induction principle, the electricity formed around the overhead transmission line Field sensing generation AC line voltage, the primary current of the overhead transmission line is once electric by coil-induced generation secondary current Stream refers to the electric current on the primary equipment such as circuit loop, and secondary current refers to the electricity in loop where such as instrument of secondary side Stream.
As shown in figure 1, the self-healing property distributed intelligent control system of the present invention, is controlled by fault monitoring system 1, break-make road System 2, information feedback system 3, line load current monitoring system 4, power transmission and transformation control system 5 are constituted, wherein malfunction monitoring system System 1 includes voltage processing module 11, failure analysis module 12 and current detection module 13.
Voltage processing module 11, current detection module 13 are arranged on looped network circuit scene, and its quantity is according to live power train Unite depending on segments, a voltage processing module 11, current detection module 13 are respectively installed on each disjunction circuit.Wherein, Current detection module 13 can be whole by full wave rectifying unit 131 and filtering partial pressure unit 132 by the alternating voltage in looped network circuit Become DC current signal output after stream;
Voltage processing module 11 includes diode D1, electric capacity C1, electric capacity C2, resistance R1 and resistance R2, wherein, diode D1 anode connects sensed AC line voltage Vin, diode D1 negative electrode one end respectively with resistance R1 and electric capacity C1 One end connection, one end, resistance R2 one end and the DC voltage of the resistance R1 other end respectively with electric capacity C2 be connected, The other end of the electric capacity C1 other end, the electric capacity C2 other end and resistance R2 is grounded respectively, and the purpose is to looped network alternating current Pressure is handled, and by alternating current circuit voltage conversion, for direct voltage output, the two signals are inputted to failure analysis module 12, The characteristics of failure analysis module 12 understands DC voltage, the DC current according to input judges specifically event occurs in which section circuit Barrier, is any failure.If the output voltage of voltage processing module 11 does not change, the circuit is normal, if output voltage is changed into 0, then the circuit is problematic;On the premise of the output valve of voltage processing module 11 is 0, if the output of current detection module 13 Current value is 0, then this section of line short, is not 0, is then earth fault.
After failure analysis module 12 is judged, its can will determine that the signal drawn be conveyed to break-make path control system 2, Information feedback system 3.Information feedback system 3 can show that out of order particular location supplies repair personnel on the display screen carried With reference at the same time, break-make path control system 2 can provide breaker of the cut-off signal to specific corresponding to, by this bar line Road is cut off, it is to avoid damaged.
Sometimes circuit is to produce failure at night, when being now that operator on duty is most tired, unavoidably can be due to drowsiness It can't see the information on the display screen of information feedback system 3.For this phenomenon, one is also added in information feedback system 3 Flash lamp and an alarm.When breaking down, fault message not only occurs on display screen, flash lamp can coruscate Bounce, while alarm can also send alarm sound, operator on duty just can easily know dangerous situation.
It is past due to increase load, and the model of power supply unit is different suddenly when carrying out reclosing after fixing a breakdown Toward that can be impacted to circuit, serious can also produce fire.Therefore, in the self-healing property distributed intelligent control system of the present invention In also add line load current monitoring system 4, input and the voltage of the line load current monitoring system 4 handle mould The output end of block 11, the output end of current detection module 13 be connected, its output end with input be connected;Its operation principle is root The current value that magnitude of voltage, the current detection module 13 inputted according to voltage processing module 11 is inputted, is calculated by program set in advance Go out the online real load of the segmented line, and shown in information feedback system 3.
Simultaneously when not breaking down, the output signal that line load current monitoring system 4 is produced can also be delivered to Power transmission and transformation control system 5, power transmission and transformation control system 5 provides operation signal extremely by contrasting every section of real load for being segmented gauze Transformer station, lifts the power transmission and transformation pressure in the sectionalized line.
In the present invention between fault monitoring system 1 and information feedback system 3, break-make path control system 2 and feedback of the information system Fiber optic communication can be both used between system 3, wireless communication can be used again, but in view of sometimes radio communication meeting Receive such as the interference of weather, highfield, cause information to transmit in time, so using fiber optic communication in the present invention.
Operation principle:When looped network circuit breaks down, information feedback system 3 can be according to specific which section voltage processing mould The signal that block 11 is exported is shown in which section goes wrong for 0, and simultaneous faults analysis module 12 can be according to current detection module Whether 13 output is 0 to judge short trouble or earth fault, if current detection module 4 is output as 0, then it represents that This section of short circuit, is otherwise earth fault, while circuit load current monitoring system 4 can calculate the actual load in every section of circuit Lotus, power transmission and transformation control system 5 provides operation signal to transformer station, lifts the power transmission and transformation pressure in the sectionalized line.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with A variety of changes, modification can be carried out to these embodiments, replace without departing from the principles and spirit of the present invention by understanding And modification, the scope of the present invention is defined by the appended.

Claims (10)

1. self-healing property distributed intelligent control system, it is characterised in that:Including fault monitoring system (1), break-make path control system (2), information feedback system (3), the fault monitoring system (1) is capable of detecting when on loop grid to be specifically which section event occurs Barrier, and this signal is delivered to break-make path control system (2), information feedback system (3), the break-make path control system (2) according to Judge the overhead line breaker that need to disconnect according to the output signal of fault monitoring system (1), and send signal to make specific execution machine Structure is acted;The signal that information feedback system (3) can export fault monitoring system (1) is shown.
2. self-healing property distributed intelligent control system according to claim 1, it is characterised in that:Described malfunction monitoring system System (1) includes voltage processing module (11), failure analysis module (12) and current detection module (13);
The voltage processing module (11) is handled the alternating voltage of looped network alternating current circuit, is by alternating current circuit voltage conversion DC voltage, and it is delivered to failure analysis module (12);
Alternating current circuit is converted into DC voltage by the current detection module (13) by the secondary current of coil-induced generation, and It is delivered to failure analysis module (12);
The failure analysis module (12) according to voltage processing module (11) input voltage whether be 0 judge whether it is anti-raw therefore Barrier;If input voltage does not change, the circuit is normal, if input voltage is changed into 0, the circuit is problematic;
Whether the DC voltage that the failure analysis module (12) inputs according to current detection module (13) is that 0 judgement is grounded Failure or short trouble;On the premise of the output valve of voltage processing module (11) is 0, if being 0, the circuit in input voltage Short circuit, is otherwise earth fault.
3. self-healing property distributed intelligent control system according to claim 2, it is characterised in that:Described voltage processing mould Block (11), current detection module (13) are arranged on looped network circuit scene, depending on its quantity is according to live power system segments, often One voltage processing module (11), current detection module (13) are respectively installed on one disjunction circuit.
4. self-healing property distributed intelligent control system according to claim 3, it is characterised in that:The voltage processing module (11) diode D1, electric capacity C1, electric capacity C2, resistance R1 and resistance R2 are included, wherein, diode D1 anode connection is sensed AC line voltage Vin, diode D1 negative electrode is connected with resistance R1 one end and electric capacity C1 one end respectively, resistance R1's One end, resistance R2 one end and the DC voltage of the other end respectively with electric capacity C2 are connected, electric capacity the C1 other end, electric capacity The C2 other end and the resistance R2 other end are grounded respectively.
5. self-healing property distributed intelligent control system according to claim 3, it is characterised in that:The current detection module (13) comprising full wave rectifying unit (131) and filtering partial pressure unit (132).
6. self-healing property distributed intelligent control system according to claim 1, it is characterised in that:The fault monitoring system (1) can be logical using optical fiber between information feedback system (3), between break-make path control system (2) and information feedback system (3) Letter or wireless communication.
7. self-healing property distributed intelligent control system according to claim 6, it is characterised in that:The fault monitoring system (1) between information feedback system (3), fiber optic communication is used between break-make path control system (2) and information feedback system (3).
8. self-healing property distributed intelligent control system according to claim 1, it is characterised in that:Described information reponse system (3) alarm and a flash lamp are also equipped with.
9. self-healing property distributed intelligent control system according to claim 1, it is characterised in that:Described self-healing property distribution Formula intelligence control system also includes line load current monitoring system (4), the input of the line load current monitoring system (4) End is connected with the output end of voltage processing module (11), the output end of current detection module (13), its output end and feedback of the information The input of system (3) is connected;
The principle of the line load current monitoring system (4) is:Magnitude of voltage, the electric current inputted according to voltage processing module (11) The current value of detection module (13) input, the online real load of the segmented line is calculated by program set in advance.
10. self-healing property distributed intelligent control system according to claim 9, it is characterised in that:Described self-healing property Distributed intelligent control system also includes power transmission and transformation control system (5), its input and line load current monitoring system (4) Output end is connected, and by contrasting the real load of every section of segmentation gauze, provides operation signal to transformer station, lifts the sectionalized line In power transmission and transformation pressure.
CN201710345483.2A 2017-05-12 2017-05-12 Self-healing property distributed intelligent control system Pending CN107302263A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710345483.2A CN107302263A (en) 2017-05-12 2017-05-12 Self-healing property distributed intelligent control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710345483.2A CN107302263A (en) 2017-05-12 2017-05-12 Self-healing property distributed intelligent control system

Publications (1)

Publication Number Publication Date
CN107302263A true CN107302263A (en) 2017-10-27

Family

ID=60137917

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710345483.2A Pending CN107302263A (en) 2017-05-12 2017-05-12 Self-healing property distributed intelligent control system

Country Status (1)

Country Link
CN (1) CN107302263A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109066666A (en) * 2018-09-07 2018-12-21 广州京善电子有限公司 Low-voltage distribution system

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201974501U (en) * 2011-02-21 2011-09-14 思源电气股份有限公司 Fault indicator for overhead lines
CN102306929A (en) * 2011-09-14 2012-01-04 宁波市鄞州供电局 Method and system for realizing fault self-healing
CN104617565A (en) * 2014-12-15 2015-05-13 国网冀北电力有限公司秦皇岛供电公司 Device and method for rapid identification of line distribution network fault location
CN104677417A (en) * 2014-12-25 2015-06-03 国家电网公司 Fault detection system and method for power transmission line
CN105070157A (en) * 2015-07-16 2015-11-18 国网技术学院 Feeder automation simulation training system
CN105259476A (en) * 2015-11-04 2016-01-20 海南电力技术研究院 Detection method and system of line fault positioning system of power distribution network

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201974501U (en) * 2011-02-21 2011-09-14 思源电气股份有限公司 Fault indicator for overhead lines
CN102306929A (en) * 2011-09-14 2012-01-04 宁波市鄞州供电局 Method and system for realizing fault self-healing
CN104617565A (en) * 2014-12-15 2015-05-13 国网冀北电力有限公司秦皇岛供电公司 Device and method for rapid identification of line distribution network fault location
CN104677417A (en) * 2014-12-25 2015-06-03 国家电网公司 Fault detection system and method for power transmission line
CN105070157A (en) * 2015-07-16 2015-11-18 国网技术学院 Feeder automation simulation training system
CN105259476A (en) * 2015-11-04 2016-01-20 海南电力技术研究院 Detection method and system of line fault positioning system of power distribution network

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109066666A (en) * 2018-09-07 2018-12-21 广州京善电子有限公司 Low-voltage distribution system

Similar Documents

Publication Publication Date Title
CN103760454B (en) MOV lightning arrester leakance detection device, long distance control system and method
CN103124068B (en) A kind of anti-island protect system of distributed power generation grid-connected system and guard method thereof
CN203350394U (en) Cable fault locating and temperature load on-line monitoring system
CN101867171A (en) Distributed generator islanding detection method based on impedance measurement
CN203422438U (en) Real-time monitoring and fault location system for overhead lines of power distribution network
CN103138390A (en) Power distribution network fault handling method based on self-recovering control
CN204758748U (en) Cubical switchboard intelligent integrated monitoring devices
CN104795838A (en) Intelligent anti-islanding device and automatic islanding detecting and destroying method
CN109687590A (en) A kind of be classified stops send a telegram in reply report method, system
CN104133157A (en) High-voltage line failure indication and failure automatic positioning system
CN101714756B (en) Equivalent negative sequence impedance-based distributed generator islanding protection method
CN106357004A (en) Distributed feeder line automatic monitoring device for rural power distribution network
CN107302268B (en) Monitoring system for operating environment around distribution room
CN105391033A (en) Layered domain-partitioned anti-islanding protection method for large-scale wind power generation
CN106249039A (en) A kind of on-line overvoltage monitor for power distribution network
CN104269833B (en) DG-included power distribution network protection scheme
CN210626591U (en) Intelligent alarm device for monitoring state of low-voltage distribution substation area
CN105372529A (en) Power grid islanding detection and anti-islanding protection method for large-scale wind power generation system
CN209676004U (en) A kind of the wireless monitor detector and system of electric line safe operation
CN201708587U (en) Intelligent digital automation distribution network system
CN203069726U (en) Rural power grid power distribution line fault location and isolation system
CN104330686A (en) System for detecting power supply circuit fault
CN103872770A (en) Different power supply region feeder automation collocation method based on wiring mode
CN107302263A (en) Self-healing property distributed intelligent control system
CN109980782A (en) A kind of the wireless monitor detector and system of electric line safe operation

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20171027