CN109613394A - A kind of intelligent distribution making alive time type fault section method of discrimination on the spot - Google Patents
A kind of intelligent distribution making alive time type fault section method of discrimination on the spot Download PDFInfo
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- CN109613394A CN109613394A CN201811457889.0A CN201811457889A CN109613394A CN 109613394 A CN109613394 A CN 109613394A CN 201811457889 A CN201811457889 A CN 201811457889A CN 109613394 A CN109613394 A CN 109613394A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
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- 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
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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- General Physics & Mathematics (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The present invention relates to distribution automation field, more particularly to a kind of intelligent distribution making alive time type fault section method of discrimination on the spot.This method uses the intelligent distributed main protection as system, and the time for completing protection is less than maximum mute time △ T1；In the case where the failure of intelligent distributed main protection Fault Isolation, by substation's delay tripping isolated fault, system power loss switchs to voltage-time type back-up protection, isolated fault of closing a floodgate step by step.This method is in the case where intelligent distributed main protection Fault Isolation fails, and by substation's delay tripping isolated fault, system power loss switchs to voltage-time type back-up protection, isolated fault of closing a floodgate step by step.The invention can ensure that the rapidity and reliability of isolated fault.
Description
Technical field
The present invention relates to field of electric power automation, more particularly to a kind of event on the spot of intelligent distribution making alive time type
Hinder section method of discrimination.
Background technique
According to the difference of installation troubleshooting mode, the troubleshooting mode of electrical power distribution automatization system can be divided on the spot
Type, concentrated and mixed type.Wherein type troubleshooting mode does not need power distribution automation main station participation and can complete failure on the spot
Processing, is divided into voltage-vs-time mode and intelligent distributed both of which.
1) voltage-vs-time mode
Voltage-vs-time mode is automatic circuit and a kind of mutually matched automatism isolation mode of voltage-time type sectionaliser.No
Communication network is needed, the mutual cooperation for relying solely on switch room can complete troubleshooting.
2) intelligent distributed
Intelligent distributed dependence needs communication network, is cooperated by each switch intercommunication and realizes fault location, isolation
With recovery.
Two kinds of implementations of type are two standalone configurations to tradition on the spot, both modes respectively have feature:
Voltage-vs-time mode function is simple, reliable, easy to maintain, is not only restricted to grid structure variation；But when isolated fault
Between it is long, need substation to be at least overlapped once, multiple short-circuit current rush caused to fault point；Not suitable for power supply reliability requirement
The high combination area of city and country.
Intelligent distributed isolated fault speed is fast, disposable that isolated fault point is accurately positioned, and power supply reliability is high；It is suitable for
Complicated operation with closed ring network；But it is costly, it is slightly poor that reliability is limited by communication equipment, needs fiber optic communication auxiliary branch
It holds；Suitable for simple grid structure, the higher occasion of main city zone power quality.
Type product individually uses intelligent distributed or voltage-time type mode to tradition on the spot, and there are each for configuration
From defect.
Summary of the invention
In order to solve tradition in the prior art, type product individually uses intelligent distributed or voltage-time type side on the spot
The deficiency of formula, the present invention provides a kind of intelligent distribution making alive time type fault section method of discrimination on the spot, the masters of this method
Protection has quick-action, can quickly cut off fault zone, improves power supply reliability；And the voltage-vs-time as back-up protection
Type protection, does not rely on grid structure especially, can be after main protection communication failure, automatic separating fault region, and does not expand failure
Region.
To realize the above goal of the invention, the technical solution adopted is that:
A kind of intelligent distribution making alive time type fault section method of discrimination on the spot, the method is using intelligent distributed
As the main protection of electric system, the time for completing protection is less than maximum mute time △ T1；In intelligent distributed main protection event
In the case where hindering isolated failure, by substation's delay tripping isolated fault, system power loss switchs to voltage-time type standby guarantor
Shield, isolated fault of closing a floodgate step by step.
Preferably, the maximum mute time △ T1 is 150ms.
Preferably, the open circuit in the case where intelligent distributed formula excision malfunction and failure route still overcurrent, in substation
For device by overcurrent delay time definite value △ T2 line disconnection electric current, breaker issues the instruction of decompression separating brake, and each Distributed power is whole
End automatically switches to voltage-time type back-up protection mode.
Preferably, the overcurrent delay time definite value △ T2 value range is 200~300ms.
Preferably, the case where intelligent distributed main protection Fault Isolation failure includes: communication module is led extremely
Cause can not obtain some node electricity data, and data interference leads to error in data, and breaker, which outputs exception, causes separating brake to fail.
Compared with prior art, the beneficial effects of the present invention are:
The present invention provides a kind of intelligent distribution making alive time type fault section method of discrimination on the spot, the main guarantors of this method
Protector has quick-action, can quickly cut off fault zone, improves power supply reliability；And the voltage-time type as back-up protection
Protection does not rely on grid structure especially, can be after main protection communication failure, automatic separating fault region, and does not expand faulty section
Domain.
Detailed description of the invention
Fig. 1 is flow chart of the method for the present invention.
Fig. 2 is intelligent distributed isolated fault block diagram of the invention；
Fig. 3 is nearly standby (voltage-time type) isolated fault block diagram of the invention.
Specific embodiment
The attached figures are only used for illustrative purposes and cannot be understood as limitating the patent；
Below in conjunction with drawings and examples, the present invention is further elaborated.
Embodiment 1
As shown in Figure 1, fault section method of discrimination, the method use a kind of intelligent distribution making alive time type on the spot
The intelligent distributed main protection as electric system, the time for completing protection are less than maximum mute time △ T1；In intelligent distribution
In the case that formula main protection Fault Isolation fails, by substation's delay tripping isolated fault, system power loss switchs to voltage-vs-time
Type back-up protection, isolated fault of closing a floodgate step by step.
As a preferred embodiment, the maximum mute time △ T1 is 150ms.
As a preferred embodiment, in the case where intelligent distributed formula excision malfunction and failure route still overcurrent,
For breaker in substation by overcurrent delay time definite value △ T2 line disconnection electric current, breaker issues the instruction of decompression separating brake,
Each Distributed power terminal automatically switches to voltage-time type back-up protection mode.
As a preferred embodiment, the overcurrent delay time definite value △ T2 value range is 200~300ms.
As a preferred embodiment, the case where described intelligent distributed main protection Fault Isolation failure, includes:
Communication module leads to not obtain some node electricity data extremely, and data interference leads to error in data, and breaker outputs exception
Separating brake is caused to fail.
Embodiment 2
As shown in Figure 1, Figure 2 and shown in Fig. 3, work as line failure, the first intelligent distributed carry out fault section of main protection
Isolation, if overcurrent delay time definite value △ T time is also not isolated to failure, substation's tripping transfers to back-up protection electric automatically
Pressure-time type protection carries out Fault Isolation.
As shown in Fig. 2, passing through adjacent distribution in high speed optical fiber communication network, with same looped network by each Distributed power terminal
Terminal carries out information exchange, and by consecutive points information comparison, fault zone (speed is cut off before substation exit breaker actuation
Ejector half distributed intelligence cuts off fault time completely should be in 150ms), it prevents substation exit breaker from malfunctioning, realizes quick
Fault location, isolation and non-faulting region restore electricity.Such as: short trouble occurring between K2 and K3, intelligent distribution senses overcurrent
Differentiation, faster trip K2 switch, and tripping K3 switch isolation fault section are communicated with neighbouring, and interconnection switch LS is allowed to turn to supply, it is complete
At restoring power supply in non-broken-down section.
As shown in figure 3, when the abnormal conditions such as communication abnormality or switch failure occur for route, under without manual intervention,
Adaptively it is switched to voltage-time type FA logic.As the back-up protection after main protection failure.Execute following steps:
State (1) works normally: short trouble occurs between branch switch K2 and K3 route；
State (2) fault trip: due to communication abnormality or switch failure, by substation overcurrent delay time definite value △ T
After time, in substation's outlet switch trip protection, whole route power loss, it is automatic into ring to go out switch gap decompression for each ring on route
Separating brake；
State (3) breaker CB1 is overlapped: substation's outlet switch passes through main website remote control or setting single shot reclosing
Afterwards, each switch gap unilateral side step by step that is successively delayed has pressure time-delay closing (default delay time 5S), closes step by step from substation exit
To fault point, (if main protection intelligent distribution unsuccessfully causes for switch fault, K2 switch executes always coincidence movement, voltage-to lock
Time type then can switch to close a floodgate in K1 arrives fault point, is isolated)；
State (4) branch switch K2/K3 lock-reclosing: the switch of He Zhong Library point front end detects overcurrent, rear to accelerate
Trip protection and locking separating brake, isolated fault, the locking of fault point Foot switches residual voltage are closed a floodgate.
State (5) failure back segment turns power supply by interconnection switch LS: fault point back segment interconnection switch unilateral side power loss is reversely delayed
It closes a floodgate, restores non-fault zone power supply.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this
Made any modifications, equivalent replacements, and improvements etc., should be included in the claims in the present invention within the spirit and principle of invention
Protection scope within.
Claims (5)
1. a kind of intelligent distribution making alive time type fault section method of discrimination on the spot, which is characterized in that the method uses
The intelligent distributed main protection as electric system, the time for completing protection are less than maximum mute time △ T1；In intelligent distribution
In the case that formula main protection Fault Isolation fails, by substation's delay tripping isolated fault, system power loss switchs to voltage-vs-time
Type back-up protection, isolated fault of closing a floodgate step by step.
2. a kind of intelligent distribution making alive time type according to claim 1 fault section method of discrimination on the spot, feature
It is, the maximum mute time △ T1 is 150ms.
3. a kind of intelligent distribution making alive time type according to claim 1 fault section method of discrimination on the spot, feature
It is, in the case where intelligent distributed formula excision malfunction and failure route still overcurrent, the breaker in substation passes through overcurrent
Delay time definite value △ T2 line disconnection electric current, breaker issue the instruction of decompression separating brake, and each Distributed power terminal automatically switches
To voltage-time type back-up protection mode.
4. a kind of intelligent distribution making alive time type according to claim 3 fault section method of discrimination on the spot, feature
It is, the overcurrent delay time definite value △ T2 value range is 200 ~ 300ms.
5. a kind of intelligent distribution making alive time type according to claim 4 fault section method of discrimination on the spot, feature
It is, the case where described intelligent distributed main protection Fault Isolation failure includes: communication module leads to not obtain extremely
Some node electricity data, data interference lead to error in data, and breaker, which outputs exception, causes separating brake to fail.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811457889.0A CN109613394B (en) | 2018-11-30 | 2018-11-30 | Intelligent distributed voltage-adding time type in-situ fault section discrimination method |
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| CN201811457889.0A CN109613394B (en) | 2018-11-30 | 2018-11-30 | Intelligent distributed voltage-adding time type in-situ fault section discrimination method |
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| CN109613394B CN109613394B (en) | 2021-04-02 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112271711A (en) * | 2020-11-18 | 2021-01-26 | 珠海许继电气有限公司 | Distributed fault protection method and device for transformer substation |
| CN113156268A (en) * | 2021-04-28 | 2021-07-23 | 广东电网有限责任公司珠海供电局 | Voltage time type or current type based fault positioning method, device and equipment |
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| CN107204663A (en) * | 2017-06-05 | 2017-09-26 | 湖南大学 | A kind of back-up protection method of distributed intelligence power distribution network |
| CN108683161A (en) * | 2018-05-31 | 2018-10-19 | 湖南世优电力科技股份有限公司 | A kind of differential back-up protection method applied to intelligent distribution network |
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2018
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| CN103872656A (en) * | 2014-03-13 | 2014-06-18 | 国家电网公司 | Distributive bus fast protection realization method for intelligent transformer substation |
| CN107204663A (en) * | 2017-06-05 | 2017-09-26 | 湖南大学 | A kind of back-up protection method of distributed intelligence power distribution network |
| CN108683161A (en) * | 2018-05-31 | 2018-10-19 | 湖南世优电力科技股份有限公司 | A kind of differential back-up protection method applied to intelligent distribution network |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112271711A (en) * | 2020-11-18 | 2021-01-26 | 珠海许继电气有限公司 | Distributed fault protection method and device for transformer substation |
| CN113156268A (en) * | 2021-04-28 | 2021-07-23 | 广东电网有限责任公司珠海供电局 | Voltage time type or current type based fault positioning method, device and equipment |
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| CN109613394B (en) | 2021-04-02 |
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