CN107462805A - A kind of short circuit fault of power distribution network protection and localization method - Google Patents
A kind of short circuit fault of power distribution network protection and localization method Download PDFInfo
- Publication number
- CN107462805A CN107462805A CN201710929996.8A CN201710929996A CN107462805A CN 107462805 A CN107462805 A CN 107462805A CN 201710929996 A CN201710929996 A CN 201710929996A CN 107462805 A CN107462805 A CN 107462805A
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- Prior art keywords
- fault
- line
- protection module
- protection
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Classifications
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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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
Abstract
The invention discloses a kind of protection of short circuit fault of power distribution network and localization method.It solves the problems, such as that the lookup of current short fault location needs to expend substantial amounts of human and material resources and extends failure existence time in power distribution network; after single-phase grounding fault generation; the zero-sequence current Sudden Changing Rate each measured is uploaded to main website by each Protection Module; main website judges singlephase earth fault circuit and fault section according to the situation of each measurement point zero-sequence current Sudden Changing Rate; so as to realize being automatically positioned for all kinds of short trouble sections on distribution line, guidance is provided for staff scene investigation failure.
Description
Technical field
The present invention relates to short trouble detection technique in a kind of power system, more particularly to a kind of short circuit fault of power distribution network to protect
Shield and localization method.
Background technology
China's low and medium voltage distribution network generally uses neutral point non-direct grounding system, due to supply network branch in power distribution network
More, the complicated network structure is changeable, and line arrangement environment is complicated, adds the probability of failure so that broken down in power distribution network
Probability it is of a relatively high compared with power transmission network.Distribution network automated progressively application provides for the positioning of various short trouble sections
Possibility, it is a variety of to be suggested based on distribution network automated fault section location algorithm, and be applied in Practical Project, but do not have
It is still a problem to have short trouble positioning in the distribution network automated electric power system of implementation, and the lookup of its abort situation needs to consume
Take substantial amounts of human and material resources, and extend the time existing for failure in power distribution network.Therefore, fault section is fast and accurately found,
It is significant to the power supply reliability of offer power distribution network.
The content of the invention
The present invention sets band at the outlet of substation bus bar feeder, supply line's block switch and branched line switch
There is a Protection Module of radio communication function, Protection Module gathers each phase voltage of this section, residual voltage and each in real time
Phase current, zero-sequence current, using each voltage and each difference of phase currents judges whether to break down and fault type, for phase
Between short circuit circuit breaker trip is acted on according to relaying configuration situation, and result is uploaded to main website, main website is according to each protection module
The result failure judgement section of upload；For single-line to ground fault, zero-sequence current that each Protection Module will be measured each
Sudden Changing Rate is uploaded to main website, and main website judges singlephase earth fault circuit and event according to the situation of each measurement point zero-sequence current Sudden Changing Rate
Hinder section.So as to realize being automatically positioned for all kinds of short trouble sections on distribution line, carried for staff scene investigation failure
For instructing.
In the outlet of substation bus bar feeder, along supply line, installation carries at block switch and branched line switch
The Protection Module of radio communication function.Radio communication uses GPRS public networks, and Protection Module has reflection distribution line
The three-step charging of phase fault, zero-sequence current collection and Sudden Changing Rate calculating, three-phase voltage, residual voltage are adopted
Collect computing function.The affiliated transformer station's installation supply line protection of supply line and positioning master station, main website monitor busbar voltage in real time,
And with feeder line exit Protection Module, along between each Protection Module of supply line by GPRS wireless communication modes,
Realize the measurement of busbar voltage, the collection of the last measurement point electric information of supply line, the judgement of fault section and graphically show
The information such as timberline way switch state and fault section position.
Brief description of the drawings
Fig. 1 is that distribution line short protection is automatically positioned schematic diagram with section.
Embodiment
Fig. 1 is that distribution line short protection is automatically positioned schematic diagram with section.Distribution line short protect with
Section automatic station-keeping system is made up of main website, Protection Module and communication system.Wherein, each feeder line outlet of substation bus bar is equal
Protection Module is installed, needs block switch and bifurcation installation Protection Module along the outgoing of fault location；Main website
It is installed in transformer station.
The Protection Module for feeding out On line switch and its place's installation is numbered unanimously, and numbering principle is：
（1）First main line, then branch；
（2）The switch serial number 0 in feeder line exit, increase successively from small to large along bus to load direction switch sequence number.
The numbering principle describes the topological structure of circuit.
Such as m# outgoings in Fig. 1 examples, its switch number is followed successively by m0、m1、m2、m3、m4、m5, m0Sequence is switched for exit
Number, m1、m2、m3For main line upper switch sequence number, m4、m5The respectively sequence number of branch's On line switch.
Assuming that m# circuits single phase ground fault in Fig. 1, main website, the Protection Module in feeder line exit and supply lines
Protection Module on road may detect that the power supply system because all having three-phase voltage, residual voltage collection computing function
There occurs single-phase grounding fault for system.Main website can receive each circuit zero sequence that feeder line exit Protection Module uploads first
Electric current, the main website criterion that based on low current grounding stable state electric measure feature is formed ripe according to application, according to each feeder line
The zero-sequence current of outlet, the residual voltage of system can select the faulty line that single-phase earthing occurs, and now route selection result is m#
Singlephase earth fault occurs for circuit.Then, before the zero-sequence current failure that each Protection Module uploads on m# circuits is collected by main website
M in Sudden Changing Rate afterwards, i.e. Fig. 1 examples0、m1、m2、m3、m4、m5Locate the Sudden Changing Rate before and after zero-sequence current failure, main website is to m# circuits
Upper m0、m1、m2、m3、m4、m5Sudden Changing Rate and zero-sequence current before and after place's zero-sequence current failure adjust threshold value compared with, be more than
Threshold value person is failure path, and by sequence number sequential search from small to large, last is more than the Protection Module location of threshold value
Section is guilty culprit section.For example, m# circuits f in Fig. 11Point single phase ground fault, according to aforementioned switches numbering principle,
m0、m1Zero-sequence current Sudden Changing Rate be more than adjust threshold value, m1Section where switch is fault section.If m# circuits f in Fig. 12Point hair
Raw single-line to ground fault, m0、m1、m5Zero-sequence current Sudden Changing Rate be more than adjust threshold value, m5Section where switch is fault section.
Assuming that in Fig. 1 m# circuits occur phase fault, main website, feeder line exit Protection Module and supply line on
Protection Module because all have three-phase voltage, residual voltage collection computing function may detect that the electric power system send out
Phase fault is given birth to.Main website can receive the protection act situation information that Protection Module uploads on faulty line（Protection is jumped
Lock or protection are failure to actuate）, main website judges fault section according to the protection act information on faulty line.According to the selection of protection
Property, the Protection Module upload of guilty culprit section is for the information that trips, other uploads of Protection Modules everywhere
Protect information of being failure to actuate.According to the numbering principle of foregoing circuit upper switch, by sequence number sequential search from small to large is switched, " protect
Section where tripping operation " Protection Module corresponding to information is guilty culprit section.For example, m# circuits f in Fig. 11Point occurs
Phase fault, according to aforementioned switches numbering principle, m1Locate that Protection Module uploads for trip protection information, m1Where switch
Section is fault section.If m# circuits f in Fig. 12Phase fault, m occur for point5Locate that Protection Module uploads for trip protection
Information, m5Section where switch is fault section.
Claims (2)
1. a kind of short circuit fault of power distribution network protection and localization method, it is in the outlet of substation bus bar feeder, supply line
The Protection Module of radio communication function is provided with block switch and branched line switch, Protection Module is adopted in real time
Collect each phase voltage of this section, residual voltage and each phase current, zero-sequence current, be using each voltage and the judgement of each difference of phase currents
It is no to break down and fault type, circuit breaker trip is acted on according to relaying configuration situation for phase fault, and by result
It is uploaded to main website, the result failure judgement section that main website uploads according to each protection module；For single-line to ground fault, each microcomputer is protected
The zero-sequence current Sudden Changing Rate each measured is uploaded to main website by shield module, and main website is according to each measurement point zero-sequence current Sudden Changing Rate
Situation judges singlephase earth fault circuit and fault section；So as to realize, the automatic of all kinds of short trouble sections is determined on distribution line
Position, guidance is provided for staff scene investigation failure.
2. a kind of short circuit fault of power distribution network protection according to claim 1 and localization method, it is characterized in that：It is female in transformer station
The microcomputer with radio communication function is installed at block switch and branched line switch along the outlet of line feeder, supply line
Protection module；Radio communication uses GPRS public networks, and Protection Module has three sections of reflection distribution line phase fault
Formula current protection, zero-sequence current collection and Sudden Changing Rate calculating, three-phase voltage, the collection computing function of residual voltage；Supply lines
The affiliated transformer station's installation supply line protection in road and positioning master station, main website monitor busbar voltage in real time, and micro- with feeder line exit
Machine protection module, along, by GPRS wireless communication modes, realizing the survey of busbar voltage between each Protection Module of supply line
Amount, the collection of the last measurement point electric information of supply line, the judgement of fault section and graphic software platform line switching state with
And the information such as fault section position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710929996.8A CN107462805A (en) | 2017-10-09 | 2017-10-09 | A kind of short circuit fault of power distribution network protection and localization method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710929996.8A CN107462805A (en) | 2017-10-09 | 2017-10-09 | A kind of short circuit fault of power distribution network protection and localization method |
Publications (1)
| Publication Number | Publication Date |
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| CN107462805A true CN107462805A (en) | 2017-12-12 |
Family
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| CN201710929996.8A Pending CN107462805A (en) | 2017-10-09 | 2017-10-09 | A kind of short circuit fault of power distribution network protection and localization method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108899878A (en) * | 2018-07-11 | 2018-11-27 | 云南电网有限责任公司电力科学研究院 | A kind of distribution line failure localization method |
| CN109581116A (en) * | 2018-12-14 | 2019-04-05 | 海南电网有限责任公司琼海供电局 | A kind of method and apparatus detecting distribution network failure |
| CN109633376A (en) * | 2018-12-21 | 2019-04-16 | 国网北京市电力公司 | Handle the method and device of singlephase earth fault |
| CN110687402A (en) * | 2019-11-05 | 2020-01-14 | 国网安徽省电力有限公司芜湖供电公司 | Line fault positioning method and device based on intelligent switch parameters |
| CN112260240A (en) * | 2020-10-19 | 2021-01-22 | 华翔翔能科技股份有限公司 | Micro-grid feeder protection device and method |
| CN113203920A (en) * | 2021-05-11 | 2021-08-03 | 国网山东省电力公司临沂供电公司 | Power distribution network single-phase earth fault positioning system and method |
| CN114280421A (en) * | 2021-12-28 | 2022-04-05 | 国网北京市电力公司 | Method, system and device for fault selective protection of direct current power distribution network and storage medium |
| CN116488116A (en) * | 2023-03-06 | 2023-07-25 | 国网四川省电力公司技能培训中心 | 5G-based power distribution network feeder line fault collaborative isolation method, system and storage medium |
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| CN1972054A (en) * | 2006-10-26 | 2007-05-30 | 天津理工大学 | A relay protection system which can distinguish short-circuit and harmonic and its working method |
| CN101017974A (en) * | 2007-03-06 | 2007-08-15 | 耿玉泉 | Single phase grounding failure positioning method and device of neutral point non direct grounding power grid |
| CN102937675A (en) * | 2012-10-22 | 2013-02-20 | 江苏省电力公司常州供电公司 | Real-time data collecting and fault positioning system of power distribution network and working method thereof |
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Patent Citations (3)
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| CN1972054A (en) * | 2006-10-26 | 2007-05-30 | 天津理工大学 | A relay protection system which can distinguish short-circuit and harmonic and its working method |
| CN101017974A (en) * | 2007-03-06 | 2007-08-15 | 耿玉泉 | Single phase grounding failure positioning method and device of neutral point non direct grounding power grid |
| CN102937675A (en) * | 2012-10-22 | 2013-02-20 | 江苏省电力公司常州供电公司 | Real-time data collecting and fault positioning system of power distribution network and working method thereof |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108899878A (en) * | 2018-07-11 | 2018-11-27 | 云南电网有限责任公司电力科学研究院 | A kind of distribution line failure localization method |
| CN108899878B (en) * | 2018-07-11 | 2019-11-01 | 云南电网有限责任公司电力科学研究院 | A kind of distribution line failure localization method |
| CN109581116A (en) * | 2018-12-14 | 2019-04-05 | 海南电网有限责任公司琼海供电局 | A kind of method and apparatus detecting distribution network failure |
| CN109633376A (en) * | 2018-12-21 | 2019-04-16 | 国网北京市电力公司 | Handle the method and device of singlephase earth fault |
| CN110687402A (en) * | 2019-11-05 | 2020-01-14 | 国网安徽省电力有限公司芜湖供电公司 | Line fault positioning method and device based on intelligent switch parameters |
| CN112260240A (en) * | 2020-10-19 | 2021-01-22 | 华翔翔能科技股份有限公司 | Micro-grid feeder protection device and method |
| CN113203920A (en) * | 2021-05-11 | 2021-08-03 | 国网山东省电力公司临沂供电公司 | Power distribution network single-phase earth fault positioning system and method |
| CN114280421A (en) * | 2021-12-28 | 2022-04-05 | 国网北京市电力公司 | Method, system and device for fault selective protection of direct current power distribution network and storage medium |
| CN116488116A (en) * | 2023-03-06 | 2023-07-25 | 国网四川省电力公司技能培训中心 | 5G-based power distribution network feeder line fault collaborative isolation method, system and storage medium |
| CN116488116B (en) * | 2023-03-06 | 2023-12-05 | 国网四川省电力公司技能培训中心 | 5G-based power distribution network feeder line fault collaborative isolation method, system and storage medium |
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Application publication date: 20171212 |