CN109768527A - A kind of intelligence traction substation stratification guard method and system - Google Patents
A kind of intelligence traction substation stratification guard method and system Download PDFInfo
- Publication number
- CN109768527A CN109768527A CN201811530324.0A CN201811530324A CN109768527A CN 109768527 A CN109768527 A CN 109768527A CN 201811530324 A CN201811530324 A CN 201811530324A CN 109768527 A CN109768527 A CN 109768527A
- Authority
- CN
- China
- Prior art keywords
- protection
- domain
- main transformer
- protective device
- failure
- 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.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS 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
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/16—Electric power substations
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS 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
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS 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
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/12—Energy storage units, uninterruptible power supply [UPS] systems or standby or emergency generators, e.g. in the last power distribution stages
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS 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
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/248—UPS systems or standby or emergency generators
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention proposes a kind of intelligent traction substation stratification guard method and systems; station level configuration protection intelligent management unit; intelligent traction substation stratification protection is controlled, intelligent traction substation stratification protection includes with regard to ground level protection, stand domain grade protection and the protection of wide area grade；This method protection uses stratification Protection control system, based on being protected by site, stands domain and wide area protection is constructed as Protection control system of new generation jointly.Site protective device is integrated with combining unit and intelligent terminal function, simplifies system design, and process-level network uses SV and GOOSE common network mode；Domain protection of standing provides the functions such as the redundancy protecting that breaker failure, simple bus, domain prepared auto restart of standing, substanceization are protected；Wide area protection realizes AT traction power supply feeder line fast selective trip avoidance function；Station level configures intelligent protection administrative unit, is responsible for distributing rationally, the various information of administrative protection device, and the present invention improves the reliability and quick-action of protection, there is preferable application prospect.
Description
Technical field
This programme belongs to electric railway traction power supply technique field, and this programme proposes a kind of intelligent traction substation layer
Secondaryization guard method and system.
Background technique
As electric railway intelligence traction substation technology develops, traction power supply Protection Technology is pushed to innovate,
But also expose some problems.Traction substation primary equipment generally uses conventional electromagnetic transformer, traditional intelligence traction
Substation uses the framework of three layer of two net, and three layers include process layer, wall, station level；Two nets include process-level network and station
Control layer network.The protective device of wall needs the combining unit acquisition exchange SV data by process layer, passes through process layer
Intelligent terminal acquisition switching signal simultaneously realizes circuit breaker trip.The application of combining unit and intelligent terminal increases the complexity of system
Degree, intermediate data transmission and conversion link are excessive, cause normal procedure intelligent substation more general than Generic Substation protection act speed
All over slow 4-7ms；Different protective devices share combining unit, and combining unit single element failure will cause the incorrect of more set protections
Movement, reduces the reliability of protection；Protection also wants high to the quality and quantitative requirement of operation maintenance personnel.
Summary of the invention
The invention proposes a kind of intelligent traction substation stratification guard methods, cut down the number of intermediate links, reduce time-consuming, protect
Shield is installed close to primary equipment, can solve long cable transmission signal bring interference problem.Domain grade protection stand by the protection of station domain
The equipment such as device and network analyzing apparatus are constituted, and it is standby that domain protective device of standing provides breaker failure, simple bus protection, domain of standing
From the function of redundancy protection of the equipment such as throwing, feeder line and main transformer low-pressure side outlet, the reliability and quick-action of protection are improved.
To achieve the above objectives, the present invention is realized using following technical scheme:
A kind of intelligence traction substation stratification guard method, station level configuration protection intelligent management unit, control intelligence
Traction substation stratification protection, intelligent traction substation stratification protection include with regard to ground level protection, stand domain grade protection and wide area
Grade protection.
Ground level protecting group is realized in site protective device, ground level is protected, site protective device is sampled using cable
With cable tripped mode, pass through SV/GOOSE interface access procedure layer network；The site mode of protection reduces combining unit
With the intermediate link of intelligent terminal, the reliability and quick-action of protection are improved.
Domain grade protection of standing passes through station domain protective device and the grade protection of Network records analytical equipment realization station domain；Domain protection of standing fills
It sets using network samples and network tripped mode；Domain grade protection of standing is standby including breaker fail protection, simple bus protection, domain of standing
From the redundancy protecting thrown with substance relaying configuration equipment；
The protection of wide area grade is protected based on grade on the spot and the common completion of station domain grade protection, passes through fault location device and feeder line is protected
Protection unit cooperation realizes that AT traction power supply feeder line selectively trips.
Site protective device include main transformer high-pressure side protective device, main transformer low-pressure side protective device, main transformer measure and control device,
Feeder protection equipment, capacitor protector, house transformer protective device, AT protection equipment for transformer, backup auto-activating device and
Fault location device.
Site protective device be arranged in primary equipment interval, main transformer high-pressure side protection setting in main transformer outdoor cabinet,
Backup auto-activating device and fault location device are in master control room concentration group screen；To existing electric substation's intellectualized reconstruction engineering, switchgear does not have
There is the site protective device of installation space to concentrate group screen.All site protective devices are provided which double optical port access procedure layer nets
Network, process-level network use SV and GOOSE common network mode, and double-network redundant framework guarantees data transmission credibility.
Stand domain grade protection specifically includes the following steps:
Breaker fail protection: after feeder line, capacitor and house transformer trip protection failure, pass through GOOSE signal
Operation main transformer low-pressure side breaker is jumped, and by the disconnecting switch separating brake of failure breaker, isolated fault；
Simple bus protection: when main transformer low-pressure side protection overcurrent protection starting after, judge on same bus it is all go out
Whether line has overcurrent enabling signal, and judgement is outlet failure if outlet has overcurrent enabling signal, is latched simple bus protection；
Judgement is bus-bar fault if outlet does not have overcurrent enabling signal, exports simple bus action signal, tripping main transformer low-pressure side
Breaker；
It stands domain prepared auto restart: receiving the inlet wire decompression of main transformer high-pressure side protection or the GOOSE information of main transformer internal fault, knot
Close the switch position signal of full institute, output prepared auto restart action logic prepared auto restart action logic；Believe when receiving operation inlet wire decompression
Start inlet wire decompression after number from throwing, starts main transformer failure after receiving main transformer fault-signal from throwing, provided from after throwing starting
GOOSE signal sequence divide-shut brake respective switch.
Redundancy protecting: redundancy protecting is carried out to feeder line, capacitor, house transformer, main transformer low-pressure side equipment, improves substance
The functional redundancy and performance boost for changing protection, improve the power supply reliability of whole station.Main transformer high-pressure side is protected, because using dual
Change relaying configuration, the protective redundancy for domain protection of standing does not consider that main transformer high-pressure side is protected.Redundancy protecting is to feed configuration overcurrent, electricity
Flow velocity is disconnected, distance protection and rate of current rise protection, and redundancy protecting is corresponding with the protection of corresponding site to be configured.It is protected when with regard to ground level
The grade protection of station domain is acted as back-up protection when occurring abnormal.
Wide area protection is completed by site protective device and station domain protective device common implementing, the power transformation of same supply arm
Institute, AT and subregion all levelsization protect a wide area protection system be built by process-level network and Wide Area Network
System；Upstream or downstream fault direction is differentiated according to failure of ac by fault location device after contact net failure, exports failure
The GOOSE signal in direction is latched the protection for feed line T ms in electric substation's non-faulting direction, while shunt tripping AT institute and subregion failure side
To interconnection tie breaker, realize supply arm failure when selectively cut off failure function.
Protect intelligent management unit realize substation in protective device interface concentrate displaying, configuration management, backup management,
Automatically switch to protect definite value area, the monitoring of protection equipment on-line and diagnosis, exempting from for realization station domain protective device redundancy protecting definite value is whole
Fixed, self-checking.Domain protective device redundancy protecting definite value of standing is arranged by redundancy protecting object, when the fixed value modification of redundancy protecting object
Intelligent management unit can be arrived at a station domain protection afterwards with direct copying correlation definite value, reduced manual operation to the maximum extent, improved device
The reliability and flexibility used.Protection intelligent management unit analyzes current traction according to the position of the switch that wide area protection acquires
Powered operation situation.
It is a kind of intelligence traction substation stratification protect system, including protection intelligent management unit, with regard to ground level protection location,
It stands domain grade protection location and wide area grade protection location；
Protect intelligent management unit setting in station level, for controlling intelligent traction substation stratification protection；
Site protective device is based on regard to ground level protection location and realizes that, with regard to ground level protection, site protective device uses cable
Sampling and cable tripped mode, pass through SV/GOOSE interface access procedure layer network；
Domain grade protection location of standing realizes domain grade protection of standing by station domain protective device and Network records analytical equipment；Stand domain grade
Protection location uses network samples and network tripped mode；Domain grade protection location of standing includes breaker fail protection module, simple
The redundancy protecting module of bus protection module, stand domain prepared auto restart module and substance relaying configuration equipment；
Wide area grade protection location is based on completing jointly with regard to ground level protection location and station domain grade protection location, passes through fault localization
Device and feeder protection equipment cooperation, realize that AT traction power supply feeder line selectively trips.
Stand domain grade protection location carry out station domain grade protection specifically includes the following steps:
Breaker fail protection: after feeder line, capacitor and house transformer trip protection failure, pass through GOOSE signal
Operation main transformer low-pressure side breaker is jumped, and by the disconnecting switch separating brake of failure breaker, isolated fault；
Simple bus protection: when main transformer low-pressure side protection overcurrent protection starting after, judge on same bus it is all go out
Whether line has overcurrent enabling signal, and judgement is outlet failure if outlet has overcurrent enabling signal, is latched simple bus protection；
Judgement is bus-bar fault if outlet does not have overcurrent enabling signal, exports simple bus action signal, tripping main transformer low-pressure side
Breaker；
It stands domain prepared auto restart: receiving the inlet wire decompression of main transformer high-pressure side protection or the GOOSE information of main transformer internal fault, knot
Close the switch position signal of full institute, output prepared auto restart action logic；Starting inlet wire loses after receiving operation inlet wire decompression signal
Pressure starts main transformer failure from throwing after receiving main transformer fault-signal, provides GOOSE signal sequence division from after throwing starting from throwing
Lock respective switch；
Redundancy protecting: redundancy protecting is carried out to feeder line, capacitor, house transformer, main transformer low-pressure side equipment；Redundancy protecting
To feed configuration overcurrent protection, current quick, distance protection and rate of current rise protection, redundancy protecting and site are protected
Corresponding configuration；Domain grade protection stand when protecting with regard to ground level and occurring abnormal as back-up protection to act.
Wide area grade protection location is completed by site protective device and station domain protective device common implementing, same supply arm
Electric substation, AT and subregion all levelsization protect a wide area protection be built by process-level network and Wide Area Network
System；Upstream or downstream fault direction, output event are differentiated according to failure of ac by fault location device after contact net failure
Hinder the GOOSE signal in direction, is latched the protection for feed line T ms in electric substation's non-faulting direction, while shunt tripping AT institute and subregion institute failure
The interconnection tie breaker in direction selectively cuts off failure function when realizing supply arm failure.
Beneficial effect of the present invention includes:
The present invention discloses a kind of intelligent traction substation stratification guard method and system, to the layer of intelligent traction substation
Comprehensive design has been done in secondaryization protection, improves the reliability and quick-action of protection, the present invention is with good application prospect.
This method protection is using stratification protection control, based on being protected by site, stand domain and common group of wide area protection
It builds as Protection control system of new generation.Site protective device is integrated with combining unit and intelligent terminal function, simplifies system
Design, process-level network use SV and GOOSE common network mode；Domain protective device of standing includes breaker failure, simple bus, domain of standing
The functions such as the redundancy protecting that prepared auto restart, substanceization are protected；Wide area protection realizes AT traction power supply feeder line fast selective tripping function
Energy；Station level configures intelligent protection administrative unit, is responsible for distributing rationally, the various information of administrative protection device.The present invention improves
The reliability and quick-action of protection, there is a preferable application prospect.
Detailed description of the invention
System architecture figure is protected in Fig. 1 intelligence traction substation stratification.
Specific embodiment
The invention will be further described with reference to the accompanying drawing and by specific embodiment, and following embodiment is descriptive
, it is not restrictive, this does not limit the scope of protection of the present invention.
As shown in Figure 1, a kind of intelligence traction substation stratification guard method, station level configuration protection intelligent management list
Member, controls intelligent traction substation stratification protection, and intelligent traction substation stratification protection includes with regard to ground level protection, domain grade of standing
Protection and the protection of wide area grade；
Ground level protecting group is realized in site protective device, ground level is protected, site protective device is sampled using cable
With cable tripped mode, pass through SV/GOOSE interface access procedure layer network；The protection site mode of ground level protection is reduced
The intermediate link of combining unit and intelligent terminal, improves the reliability and quick-action of protection.
Domain grade protection of standing passes through station domain protective device and the grade protection of Network records analytical equipment realization station domain；Domain grade of standing is protected
Using network samples and network tripped mode；Domain protective device of standing include breaker failure, domain prepared auto restart of standing, substanceization protection match
Standby redundancy protecting is installed, the reliability of protection is improved；Domain protective device of standing further includes simple bus protection, improves protection
Quick-action.
The protection of wide area grade is protected based on grade on the spot and the common completion of station domain grade protection, passes through fault location device and feeder line is protected
Shield cooperation realizes that AT traction power supply feeder line selectively trips.
Station level configuration protection intelligent management unit realizes that site protective device and the interface for domain protective device of standing are concentrated
Displaying, optimization setting management, backup management, is automatically switched protection definite value area and the monitoring of protection equipment on-line and is examined at configuration management
It is disconnected.
Site protective device include main transformer high-pressure side protective device, main transformer low-pressure side protective device, main transformer measure and control device,
Feeder protection equipment, capacitor protector, house transformer protective device, AT protection equipment for transformer, backup auto-activating device and
Fault location device.
Site protective device be arranged in primary equipment interval, main transformer high-pressure side protection setting in main transformer outdoor cabinet,
Backup auto-activating device and fault location device are in master control room concentration group screen；To existing electric substation's intellectualized reconstruction engineering, switchgear does not have
There is the site protective device of installation space to concentrate group screen.All site protective devices are provided which double optical port access procedure layer nets
Network, process-level network use SV and GOOSE common network mode, and double-network redundant framework guarantees data transmission credibility.
Stand domain grade protection specifically includes the following steps:
Breaker fail protection: after feeder line, capacitor and house transformer trip protection failure, pass through GOOSE signal
Operation main transformer low-pressure side breaker is jumped, and by the disconnecting switch separating brake of failure breaker, isolated fault；
Simple bus protection: when main transformer low-pressure side protection overcurrent protection starting after, judge on same bus it is all go out
Whether line has overcurrent enabling signal, and judgement is outlet failure if outlet has overcurrent enabling signal, is latched simple bus protection；
Judgement is bus-bar fault if outlet does not have overcurrent enabling signal, exports simple bus action signal, tripping main transformer low-pressure side
Breaker；
It stands domain prepared auto restart: receiving the inlet wire decompression of main transformer high-pressure side protection or the GOOSE information of main transformer internal fault, knot
Close the switch position signal of full institute, output prepared auto restart action logic；Starting inlet wire loses after receiving operation inlet wire decompression signal
Pressure starts main transformer failure from throwing after receiving main transformer fault-signal, provides GOOSE signal sequence division from after throwing starting from throwing
Lock respective switch；
Redundancy protecting: redundancy protecting is carried out to feeder line, capacitor, house transformer, main transformer low-pressure side equipment, improves substance
The functional redundancy and performance boost for changing protection, improve the power supply reliability of whole station.Main transformer high-pressure side is protected, because using dual
Change relaying configuration, the protective redundancy for domain protection of standing does not consider that main transformer high-pressure side is protected.Redundancy protecting is to feed configuration over current protection
Shield, current quick, distance protection and rate of current rise protection, redundancy protecting is corresponded with the protection of corresponding site matches
It sets.Domain grade protection stand when protecting with regard to ground level and occurring abnormal as back-up protection to act.
Wide area protection is completed by site protective device and station domain protective device common implementing, the power transformation of same supply arm
Institute, AT and subregion all levelsization protect a wide area protection system be built by process-level network and Wide Area Network
System；Upstream or downstream fault direction is differentiated according to failure of ac by fault location device after contact net failure, exports failure
The GOOSE signal in direction, (the present embodiment 200ms, blocking time can be set the protection for feed line T ms in locking electric substation's non-faulting direction
Set), at the same shunt tripping AT and subregion institute fault direction interconnection tie breaker, realize supply arm failure when quickly and have selection
Cut off failure function to property.Fault localization communication channel shares wide area protection communication channel, saves construction investment.
Intelligent management unit is protected, realizes that displaying, configuration management, backup pipe are concentrated in the interface of protective device in substation
Reason automatically switches protection definite value area, the monitoring of protection equipment on-line and diagnosis, can also realize station domain protective device redundancy protecting definite value
It is free tuning, self-test.Domain protective device redundancy protecting definite value of standing is arranged by redundancy protecting object, when determining for redundancy protecting object
Value modification after intelligent management unit can be arrived at a station with direct copying correlation definite value domain protection, reduce manual operation to the maximum extent, mention
The reliability and flexibility that high device uses.Protection intelligent management unit is analyzed current according to the position of the switch that wide area protection acquires
Traction power supply operation conditions, than such as whether be over-zone feeding, whether be 1 band of feeder line, 2 mode, it is automatic according to designed rule
The operation definite value area of switch protecting.
It is a kind of intelligence traction substation stratification protect system, including protection intelligent management unit, with regard to ground level protection location,
It stands domain grade protection location and wide area grade protection location；
Protect intelligent management unit setting in station level, for controlling intelligent traction substation stratification protection；
Site protective device is based on regard to ground level protection location and realizes that, with regard to ground level protection, site protective device uses cable
Sampling and cable tripped mode, pass through SV/GOOSE interface access procedure layer network；
Domain grade protection location of standing realizes domain grade protection of standing by station domain protective device and Network records analytical equipment；Stand domain grade
Protection location uses network samples and network tripped mode；Domain grade protection location of standing includes breaker fail protection module, simple
The redundancy protecting module of bus protection module, stand domain prepared auto restart module and substance relaying configuration equipment；
Wide area grade protection location is based on completing jointly with regard to ground level protection location and station domain grade protection location, passes through fault localization
Device and feeder protection equipment cooperation, realize that AT traction power supply feeder line selectively trips.
Stand domain grade protection location carry out station domain grade protection specifically includes the following steps:
Breaker fail protection: after feeder line, capacitor and house transformer trip protection failure, pass through GOOSE signal
Operation main transformer low-pressure side breaker is jumped, and by the disconnecting switch separating brake of failure breaker, isolated fault；
Simple bus protection: when main transformer low-pressure side protection overcurrent protection starting after, judge on same bus it is all go out
Whether line has overcurrent enabling signal, and judgement is outlet failure if outlet has overcurrent enabling signal, is latched simple bus protection；
Judgement is bus-bar fault if outlet does not have overcurrent enabling signal, exports simple bus action signal, tripping main transformer low-pressure side
Breaker；
It stands domain prepared auto restart: receiving the inlet wire decompression of main transformer high-pressure side protection or the GOOSE information of main transformer internal fault, knot
Close the switch position signal of full institute, output prepared auto restart action logic；Starting inlet wire loses after receiving operation inlet wire decompression signal
Pressure starts main transformer failure from throwing after receiving main transformer fault-signal, provides GOOSE signal sequence division from after throwing starting from throwing
Lock respective switch；
Redundancy protecting: redundancy protecting is carried out to feeder line, capacitor, house transformer, main transformer low-pressure side equipment；Redundancy protecting
To feed configuration overcurrent protection, current quick, distance protection and rate of current rise protection, redundancy protecting and site are protected
Correspond configuration；Domain grade protection stand when protecting with regard to ground level and occurring abnormal as back-up protection to act.
Wide area grade protection location is completed by site protective device and station domain protective device common implementing, same supply arm
Electric substation, AT and subregion all levelsization protect a wide area protection be built by process-level network and Wide Area Network
System；Upstream or downstream fault direction, output event are differentiated according to failure of ac by fault location device after contact net failure
Hinder the GOOSE signal in direction, is latched the protection for feed line T ms in electric substation's non-faulting direction, while shunt tripping AT institute and subregion institute failure
The interconnection tie breaker in direction is realized and quickly and selectively cuts off failure function when supply arm failure.
In the instructions provided here, numerous specific details are set forth.It is to be appreciated, however, that implementation of the invention
Example can be practiced without these specific details.In some instances, well known method, knot is not been shown in detail
Structure and technology, so as not to obscure the understanding of this specification.
Similarly, it should be understood that in order to simplify the disclosure and help to understand one or more of the various inventive aspects,
Above in the description of exemplary embodiment of the present invention, each feature of the invention is grouped together into single implementation sometimes
In example, figure or descriptions thereof.However, the disclosed method should not be interpreted as reflecting the following intention: i.e. required to protect
Shield the present invention claims than feature more features expressly recited in each claim.More precisely, as right is wanted
As asking book to reflect, inventive aspect is all features less than single embodiment disclosed above.Therefore, it then follows specific
Thus claims of embodiment are expressly incorporated in the specific embodiment, wherein each claim itself is as this
The separate embodiments of invention.
Those skilled in the art should understand that the module of the equipment in example disclosed herein or unit or groups
Between can be arranged in equipment as depicted in this embodiment, or alternatively can be positioned at and the equipment in the example
In different one or more equipment.Module in aforementioned exemplary can be combined into a module or furthermore be segmented into multiple
Submodule.
Those skilled in the art will understand that can be carried out adaptively to the module in the equipment in embodiment
Change and they are arranged in one or more devices different from this embodiment.It can be the module or list in embodiment
Be combined into one between module or unit or group between member or group, and furthermore they can be divided into multiple submodule or subelement or
Between subgroup.Other than such feature and/or at least some of process or unit exclude each other, it can use any
Combination is to all features disclosed in this specification (including adjoint claim, abstract and attached drawing) and so disclosed
All process or units of what method or apparatus are combined.Unless expressly stated otherwise, this specification is (including adjoint power
Benefit require, abstract and attached drawing) disclosed in each feature can carry out generation with an alternative feature that provides the same, equivalent, or similar purpose
It replaces.
In addition, it will be appreciated by those of skill in the art that although some embodiments described herein include other embodiments
In included certain features rather than other feature, but the combination of the feature of different embodiments mean it is of the invention
Within the scope of and form different embodiments.For example, in the following claims, embodiment claimed is appointed
Meaning one of can in any combination mode come using.
In addition, be described as herein can be by the processor of computer system or by executing by some in the embodiment
The combination of method or method element that other devices of the function are implemented.Therefore, have for implementing the method or method
The processor of the necessary instruction of element forms the device for implementing this method or method element.In addition, Installation practice
Element described in this is the example of following device: the device be used for implement as in order to implement the purpose of the invention element performed by
Function.
Various technologies described herein are realized together in combination with hardware or software or their combination.To the present invention
Method and apparatus or the process and apparatus of the present invention some aspects or part can take insertion tangible media, such as it is soft
The form of program code (instructing) in disk, CD-ROM, hard disk drive or other any machine readable storage mediums,
Wherein when program is loaded into the machine of such as computer etc, and is executed by the machine, the machine becomes to practice this hair
Bright equipment.
In the case where program code executes on programmable computers, calculates equipment and generally comprise processor, processor
Readable storage medium (including volatile and non-volatile memory and or memory element), at least one input unit, and extremely
A few output device.Wherein, memory is configured for storage program code；Processor is configured for according to the memory
Instruction in the said program code of middle storage executes the method for the present invention.
By way of example and not limitation, computer-readable medium includes computer storage media and communication media.It calculates
Machine readable medium includes computer storage media and communication media.Computer storage medium storage such as computer-readable instruction,
The information such as data structure, program module or other data.Communication media is generally modulated with carrier wave or other transmission mechanisms etc.
Data-signal processed passes to embody computer readable instructions, data structure, program module or other data including any information
Pass medium.Above any combination is also included within the scope of computer-readable medium.
As used in this, unless specifically stated, come using ordinal number " first ", " second ", " third " etc.
Description plain objects, which are merely representative of, is related to the different instances of similar object, and is not intended to imply that the object being described in this way must
Must have the time it is upper, spatially, sequence aspect or given sequence in any other manner.
Although the embodiment according to limited quantity describes the present invention, above description, the art are benefited from
It is interior it is clear for the skilled person that in the scope of the present invention thus described, it can be envisaged that other embodiments.Additionally, it should be noted that
Language used in this specification primarily to readable and introduction purpose and select, rather than in order to explain or limit
Determine subject of the present invention and selects.Therefore, without departing from the scope and spirit of the appended claims, for this
Many modifications and changes are obvious for the those of ordinary skill of technical field.For the scope of the present invention, to this
Invent done disclosure be it is illustrative and not restrictive, it is intended that the scope of the present invention be defined by the claims appended hereto.
Those skilled in the art can to the present invention be modified or modification design but do not depart from think of of the invention
Think and range.Therefore, if these modifications and changes of the present invention belongs to the claims in the present invention and its equivalent technical scope
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of intelligence traction substation stratification guard method, it is characterised in that:
Station level configuration protection intelligent management unit, controls intelligent traction substation stratification protection, intelligent traction substation layer
Secondaryization protection includes with regard to ground level protection, stand domain grade protection and the protection of wide area grade；
Ground level protecting group is realized in site protective device, ground level is protected, site protective device is sampled using cable and electricity
Cable tripped mode passes through SV/GOOSE interface access procedure layer network；
Domain grade protection of standing passes through station domain protective device and the grade protection of Network records analytical equipment realization station domain；Domain grade protection of standing uses
Network samples and network tripped mode；Stand domain grade protection include breaker fail protection, simple bus protection, stand domain prepared auto restart and
The redundancy protecting of substance relaying configuration equipment；
The protection of wide area grade is protected based on grade on the spot and the common completion of station domain grade protection, passes through fault location device and protection for feed line fills
Cooperation is set, realizes that AT traction power supply feeder line selectively trips.
2. a kind of intelligent traction substation stratification guard method according to claim 1, it is characterised in that:
Cable sampling passes through the direct Sample AC data of cable；Cable tripping passes through cable direct-trip circuit-breaker, cable sampling
It is corresponding with the network samples of station domain grade protection and network tripping with cable tripping；Network samples and network tripping are realized by communication
It samples and trips.
3. a kind of intelligent traction substation stratification guard method according to claim 1, it is characterised in that:
Site protective device includes main transformer high-pressure side protective device, main transformer low-pressure side protective device, main transformer measure and control device, feeder line
Protective device, capacitor protector, house transformer protective device, AT protection equipment for transformer, backup auto-activating device and failure
Range unit.
4. a kind of intelligent traction substation stratification guard method according to claim 3, it is characterised in that:
Site protective device is arranged in primary equipment interval, and main transformer high-pressure side protective device is arranged in main transformer outdoor cabinet,
Backup auto-activating device and fault location device are in master control room concentration group screen；To existing electric substation's intellectualized reconstruction engineering, switchgear does not have
There is the site protective device of installation space to concentrate group screen.
5. a kind of intelligent traction substation stratification guard method according to claim 1, it is characterised in that:
Stand domain grade protection specifically includes the following steps:
Breaker fail protection: it after feeder line, capacitor and house transformer trip protection failure, is jumped and is transported by GOOSE signal
Row main transformer low-pressure side breaker, and by the disconnecting switch separating brake of failure breaker, isolated fault；
Simple bus protection: after the overcurrent protection starting of main transformer low-pressure side protection, judge that all outlets on same bus are
No to have overcurrent enabling signal, judgement is outlet failure if outlet has overcurrent enabling signal, is latched simple bus protection；If
Outlet does not have overcurrent enabling signal then to judge to be bus-bar fault, exports simple bus action signal, tripping main transformer low-pressure side open circuit
Device；
It stands domain prepared auto restart: the inlet wire decompression of main transformer high-pressure side protection or the GOOSE information of main transformer internal fault is received, in conjunction with complete
Switch position signal, export prepared auto restart action logic；Start inlet wire decompression certainly after receiving operation inlet wire decompression signal
It throws, starts main transformer failure after receiving main transformer fault-signal from throwing, provide GOOSE signal sequence divide-shut brake phase from after throwing starting
Inductive switch；
Redundancy protecting: redundancy protecting is carried out to feeder line, capacitor, house transformer, main transformer low-pressure side equipment；Redundancy protecting is to feedback
It is corresponding with site protection that line configures overcurrent protection, current quick, distance protection and rate of current rise protection, redundancy protecting
Configuration；Domain grade protection stand when protecting with regard to ground level and occurring abnormal as back-up protection to act.
6. a kind of intelligent traction substation stratification guard method according to claim 1, it is characterised in that:
The protection of wide area grade is completed by site protective device and station domain protective device common implementing, the electric substation of same supply arm,
AT and all levelsization protection of subregion institute one Wide area protection system is built by process-level network and Wide Area Network；When
Upstream or downstream fault direction is differentiated according to failure of ac by fault location device after contact net failure, exports fault direction
GOOSE signal is latched the protection for feed line T ms in electric substation's non-faulting direction, while shunt tripping AT institute and the connection of subregion institute fault direction
Network feeder breaker selectively cuts off failure function when realizing supply arm failure.
7. a kind of intelligent traction substation stratification guard method according to claim 1, it is characterised in that:
Protect intelligent management unit realize substation in protective device interface concentrate displayings, configuration management, backup management, automatically
Switch protecting definite value area and the monitoring of protection equipment on-line and diagnosis, domain protective device redundancy protecting definite value of standing is by redundancy protecting object
Setting, after the fixed value modification of redundancy protecting object intelligent management unit can be arrived at a station with direct copying correlation definite value domain protection；It protects
Shield intelligent management unit analyzes current traction power supply operation conditions according to the position of the switch that wide area protection acquires.
8. system is protected in a kind of intelligence traction substation stratification, it is characterised in that:
Including protection intelligent management unit, with regard to ground level protection location, stand domain grade protection location and wide area grade protection location；
Protect intelligent management unit setting in station level, for controlling intelligent traction substation stratification protection；
Site protective device is based on regard to ground level protection location and realizes that, with regard to ground level protection, site protective device is sampled using cable
With cable tripped mode, pass through SV/GOOSE interface access procedure layer network；
Domain grade protection location of standing realizes domain grade protection of standing by station domain protective device and Network records analytical equipment；Domain grade of standing is protected
Unit uses network samples and network tripped mode；Domain grade protection location of standing includes breaker fail protection module, simple bus
The redundancy protecting module of protective module, stand domain prepared auto restart module and substance relaying configuration equipment；
Wide area grade protection location is based on completing jointly with regard to ground level protection location and station domain grade protection location, passes through fault location device
Cooperate with feeder protection equipment, realizes that AT traction power supply feeder line selectively trips.
9. system is protected in a kind of intelligent traction substation stratification according to claim 8, it is characterised in that:
Stand domain grade protection location carry out station domain grade protection specifically includes the following steps:
Breaker fail protection: it after feeder line, capacitor and house transformer trip protection failure, is jumped and is transported by GOOSE signal
Row main transformer low-pressure side breaker, and by the disconnecting switch separating brake of failure breaker, isolated fault；
Simple bus protection: after the overcurrent protection starting of main transformer low-pressure side protection, judge that all outlets on same bus are
No to have overcurrent enabling signal, judgement is outlet failure if outlet has overcurrent enabling signal, is latched simple bus protection；If
Outlet does not have overcurrent enabling signal then to judge to be bus-bar fault, exports simple bus action signal, tripping main transformer low-pressure side open circuit
Device；
It stands domain prepared auto restart: the inlet wire decompression of main transformer high-pressure side protection or the GOOSE information of main transformer internal fault is received, in conjunction with complete
Switch position signal, export prepared auto restart action logic；Start inlet wire decompression certainly after receiving operation inlet wire decompression signal
It throws, starts main transformer failure after receiving main transformer fault-signal from throwing, provide GOOSE signal sequence divide-shut brake phase from after throwing starting
Inductive switch；
Redundancy protecting: redundancy protecting is carried out to feeder line, capacitor, house transformer, main transformer low-pressure side equipment；Redundancy protecting is to feedback
It is corresponding with site protection that line configures overcurrent protection, current quick, distance protection and rate of current rise protection, redundancy protecting
Configuration；Domain grade protection stand when protecting with regard to ground level and occurring abnormal as back-up protection to act.
10. system is protected in a kind of intelligent traction substation stratification according to claim 8, it is characterised in that:
Wide area grade protection location is completed by site protective device and station domain protective device common implementing, the power transformation of same supply arm
Institute, AT and subregion all levelsization protect a wide area protection system be built by process-level network and Wide Area Network
System；Upstream or downstream fault direction is differentiated according to failure of ac by fault location device after contact net failure, exports failure
The GOOSE signal in direction is latched the protection for feed line T ms in electric substation's non-faulting direction, while shunt tripping AT institute and subregion failure side
To interconnection tie breaker, realize supply arm failure when selectively cut off failure function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811530324.0A CN109768527B (en) | 2018-12-14 | 2018-12-14 | Intelligent traction substation hierarchical protection method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811530324.0A CN109768527B (en) | 2018-12-14 | 2018-12-14 | Intelligent traction substation hierarchical protection method and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109768527A true CN109768527A (en) | 2019-05-17 |
| CN109768527B CN109768527B (en) | 2020-11-24 |
Family
ID=66450658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811530324.0A Active CN109768527B (en) | 2018-12-14 | 2018-12-14 | Intelligent traction substation hierarchical protection method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109768527B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112366820A (en) * | 2020-10-21 | 2021-02-12 | 天津凯发电气股份有限公司 | Energy efficiency improvement-based traction substation digitization and networking optimization method |
| CN113036733A (en) * | 2020-09-21 | 2021-06-25 | 西南交通大学 | Traction network power supply arm relay protection method based on directional current element |
| CN113270854A (en) * | 2021-05-14 | 2021-08-17 | 广东电网有限责任公司 | Hierarchical protection system based on virtual container and establishment method thereof |
| CN113937805A (en) * | 2020-07-14 | 2022-01-14 | 南京南瑞继保工程技术有限公司 | Subway brake regenerative electric energy feedback joint debugging control method and system based on GOOSE communication |
| CN115051311A (en) * | 2022-08-17 | 2022-09-13 | 中国铁路设计集团有限公司 | Test verification method for intelligent traction power supply wide-area protection measurement and control system |
| CN117375062A (en) * | 2023-11-23 | 2024-01-09 | 中铁电气化勘测设计研究院有限公司 | Intelligent control system of flexible direct-current traction substation |
| CN117498282B (en) * | 2023-12-29 | 2024-03-08 | 广州市扬新技术研究有限责任公司 | GOOSE communication-based subway direct-current illumination power distribution network hierarchical protection system |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102769278A (en) * | 2012-08-14 | 2012-11-07 | 国电南瑞科技股份有限公司 | Layering protective system |
| CN102957558A (en) * | 2011-08-30 | 2013-03-06 | 湖南省电力勘测设计院 | Protection monitoring device with SV and GOOSE unvarnished transmission function |
| CN104135066A (en) * | 2014-04-09 | 2014-11-05 | 国电南瑞科技股份有限公司 | Intelligent substation system |
| CN105305602A (en) * | 2015-11-03 | 2016-02-03 | 成都交大许继电气有限责任公司 | Standby power system of railway digital traction substation and automatic switching method of standby power system |
| CN205070601U (en) * | 2015-07-29 | 2016-03-02 | 四川艾德瑞电气有限公司 | Based on intelligence traction substation overall framework system of IEC61850 system |
| US20170063085A1 (en) * | 2015-09-02 | 2017-03-02 | Honeywell International Inc. | PRE-CONFIGURATION AND INTEGRATION OF IEDs IN SUBSTATION AUTOMATION SYSTEMS |
| US20170353446A1 (en) * | 2016-06-03 | 2017-12-07 | Cisco Technology, Inc. | Virtual electronic security perimeter using deterministic networking |
| CN207926175U (en) * | 2017-11-29 | 2018-09-28 | 中国铁路总公司 | Electric railway wide area protection TT＆C system |
-
2018
- 2018-12-14 CN CN201811530324.0A patent/CN109768527B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102957558A (en) * | 2011-08-30 | 2013-03-06 | 湖南省电力勘测设计院 | Protection monitoring device with SV and GOOSE unvarnished transmission function |
| CN102769278A (en) * | 2012-08-14 | 2012-11-07 | 国电南瑞科技股份有限公司 | Layering protective system |
| CN104135066A (en) * | 2014-04-09 | 2014-11-05 | 国电南瑞科技股份有限公司 | Intelligent substation system |
| CN205070601U (en) * | 2015-07-29 | 2016-03-02 | 四川艾德瑞电气有限公司 | Based on intelligence traction substation overall framework system of IEC61850 system |
| US20170063085A1 (en) * | 2015-09-02 | 2017-03-02 | Honeywell International Inc. | PRE-CONFIGURATION AND INTEGRATION OF IEDs IN SUBSTATION AUTOMATION SYSTEMS |
| CN105305602A (en) * | 2015-11-03 | 2016-02-03 | 成都交大许继电气有限责任公司 | Standby power system of railway digital traction substation and automatic switching method of standby power system |
| US20170353446A1 (en) * | 2016-06-03 | 2017-12-07 | Cisco Technology, Inc. | Virtual electronic security perimeter using deterministic networking |
| CN207926175U (en) * | 2017-11-29 | 2018-09-28 | 中国铁路总公司 | Electric railway wide area protection TT＆C system |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113937805A (en) * | 2020-07-14 | 2022-01-14 | 南京南瑞继保工程技术有限公司 | Subway brake regenerative electric energy feedback joint debugging control method and system based on GOOSE communication |
| CN113036733A (en) * | 2020-09-21 | 2021-06-25 | 西南交通大学 | Traction network power supply arm relay protection method based on directional current element |
| CN112366820A (en) * | 2020-10-21 | 2021-02-12 | 天津凯发电气股份有限公司 | Energy efficiency improvement-based traction substation digitization and networking optimization method |
| CN113270854A (en) * | 2021-05-14 | 2021-08-17 | 广东电网有限责任公司 | Hierarchical protection system based on virtual container and establishment method thereof |
| CN113270854B (en) * | 2021-05-14 | 2022-05-27 | 广东电网有限责任公司 | Hierarchical protection system based on virtual container and establishment method thereof |
| CN115051311A (en) * | 2022-08-17 | 2022-09-13 | 中国铁路设计集团有限公司 | Test verification method for intelligent traction power supply wide-area protection measurement and control system |
| CN117375062A (en) * | 2023-11-23 | 2024-01-09 | 中铁电气化勘测设计研究院有限公司 | Intelligent control system of flexible direct-current traction substation |
| CN117375062B (en) * | 2023-11-23 | 2024-04-16 | 中铁电气化勘测设计研究院有限公司 | Intelligent control system of flexible direct-current traction substation |
| CN117498282B (en) * | 2023-12-29 | 2024-03-08 | 广州市扬新技术研究有限责任公司 | GOOSE communication-based subway direct-current illumination power distribution network hierarchical protection system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109768527B (en) | 2020-11-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109768527A (en) | A kind of intelligence traction substation stratification guard method and system | |
| CN105515188B (en) | A kind of power distribution network centralization feeder automation fault handling method | |
| CN104518564B (en) | Backup automatic switching apparatus with area automatic switching function, and backup automatic switching method | |
| CN202455055U (en) | Current selective tripping and large-zone power supply protecting system of rail transit power supply system | |
| CN103887879B (en) | Petal-shaped distribution protection control system | |
| WO2008115342A1 (en) | Advanced feeder architecture with automated power restoration | |
| CN101621217B (en) | Protection system for area electric network data sharing | |
| CN106058829A (en) | Fault protection system for distribution system | |
| JP2003299263A (en) | Monitor control system | |
| CN105305365A (en) | Power grid relay protection emergency management system | |
| CN110098602A (en) | A kind of Guangdong power system isolating device and method | |
| AU2018363059B2 (en) | Control system for and method of fault location, isolation and supply restoration | |
| CN103078303A (en) | Differential protection method capable of automatically switching protection domains | |
| CN105262064A (en) | Substation area backup protection method used for simplifying transformer in-place backup protection | |
| Begovic et al. | System integrity protection schemes (SIPS) | |
| CN106329492A (en) | Simple bus protection method based on system topology | |
| CN106129970A (en) | A kind of simple bus bar protecting method for intelligent substation low-voltage bus bar | |
| CN206235698U (en) | A kind of electric network single-phase earth fault differentiates, isolates and resultant fault anticipation device | |
| CN202455052U (en) | Main/standby protective device for track traffic power supply system interval failure | |
| CN104701823A (en) | Networking intelligent switch protection system for feeders of power distribution networks | |
| GB2462001A (en) | Fault detection and restoration system | |
| CN103683227B (en) | A kind of method of Substation Station alternating current power supply two sections protection Graded coordination | |
| Fan et al. | Feeder automation within the scope of substation automation | |
| CN109510192A (en) | The self-healing method of power distribution network and power distribution network | |
| CN206023197U (en) | A kind of differential protective system |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |