CN106300339B - A kind of Fault Isolation based on unit style power distribution network and service restoration method - Google Patents

A kind of Fault Isolation based on unit style power distribution network and service restoration method Download PDF

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Publication number
CN106300339B
CN106300339B CN201610747768.4A CN201610747768A CN106300339B CN 106300339 B CN106300339 B CN 106300339B CN 201610747768 A CN201610747768 A CN 201610747768A CN 106300339 B CN106300339 B CN 106300339B
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Prior art keywords
power
load
power supply
equal
stand
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CN106300339A (en
Inventor
韩冰
张志昌
赵家庆
苏大威
吴�琳
孙海涛
时金媛
吴博文
徐秀之
王若晨
赵奇
李春
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STATE GRID JIANGSU ELECTRIC POWER Co.,Ltd. SUZHOU POWER SUPPLY BRANCH
Original Assignee
Suzhou Power Supply Co Of State Grid Jiangsu Electric Power Co
Zhejiang Harnpu Power Technology Co Ltd
State Grid Corp of China SGCC
State Grid Jiangsu Electric Power Co Ltd
Nari Technology Co Ltd
NARI Nanjing Control System Co Ltd
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Priority to CN201610747768.4A priority Critical patent/CN106300339B/en
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00Emergency 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
    • H02H7/26Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/007Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
    • H02J3/0073Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources for providing alternative feeding paths between load and source when the main path fails, e.g. transformers, busbars
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/001Methods to deal with contingencies, e.g. abnormalities, faults or failures

Abstract

The invention discloses a kind of Fault Isolations based on unit style power distribution network and service restoration method, include the following steps:(1) power load table and supply load table are traversed, judges whether power load is equal with supply load, it is equal, terminate;Unequal steering (2);(2) busbar and switch list are traversed, by positioning overcurrent protective switch, while detecting interconnection switch state;(3) supply path table is traversed, supply path is judged whether there is, does not turn to (5);There is steering (4);(4) judge whether power supply capacity is more than or equal to power load, be more than or equal to and turn to (7);Less than steering (5);(5) stand-by power supply routing table is traversed, stand-by power supply path is judged whether there is, has steering (6), be not over;(6) judge whether stand-by power supply capacity is more than or equal to power load, be more than or equal to and turn to (7);Less than then terminating;(7) it restores electricity.Calculation amount of the present invention is few, analyze speed is fast.

Description

A kind of Fault Isolation based on unit style power distribution network and service restoration method
Technical field
The present invention relates to a kind of isolation of distribution network failure and service restoration method, and in particular to one kind being based on unit style distribution The Fault Isolation of net and service restoration method, belong to technical field of power systems.
Background technology
Unit style power supply i.e. using division of the power supply area be several distribution net units as the minimum of power distribution network operational management Logic unit is planned by unit style power distribution network being divided into multiple power supply zones, based on the analysis of power distribution network As-Is Assessment, According to the Planning Standard of power supply area differentiation, determine that objective net support structure of medium-voltage distribution network Connection Mode, science divide each power supply Zoning is divided into several power supply logics units, accessed using logic unit of powering as medium-Voltage Distribution network planning, project management, user, The base unit for running control meets distribution network construction, the highly reliable operation demand that user accesses.
The troubleshooting pattern of distribution automation is mainly the following at present:
(1) fault handling method of the multi-objective optimization algorithm based on unit feeder pattern using genetic algorithm, fuzzy pushes away The methods of reason, expert system, TABU search, artificial neural network, integer programming, rough set solve the failure as unit of feeder line It is isolated and optimizes the problem that restores electricity, it is domestic with Hohai University, Shanghai Communications University, Sichuan University, Wuhan University, North China electricity The achievement in research of power university, Xi'an Communications University, University On The Mountain Of Swallows etc. is the most typical.
(2) power distribution network relay protection and distributed intelligence distribution network failure treatment technology aspect, main includes that Japanese Toshiba is public The automatic circuit of department and voltage-time type sectionaliser fitting method, Cooper companies of the U.S. automatic circuit with overlap fitting method, section The combined floodgate quick-break fitting method and be based on that " face protection " technology as unit of feeder line of sharp company's proposition, professor Liu Jian propose The fast failure positioning of GOOSE nets proposes to be applied to contain by distance protection with partition method, Shanghai Communications University, University Of Chongqing In the power distribution network of distributed generation resource, University Of Tianjin propose the protection scheme containing distributed power distribution network based on wide area network, in Electric Power Research Institute of state proposes power distribution network self-adaptive current fast tripping protection scheme after wind power plant access;Zhejiang University proposes profit It is proposed with reactor current limliting and the method for limitation access capacity to coordinate distributed power generation and distribution protection, Dalian University of Technology Guard method etc. based on detection boundaries on either side special frequency channel transient current energy.
(3) distribution network failure information collection and method is positioned manually, stresses to take economical and practical method (such as installation failure Indicator etc.) acquisition fault message, it is conditional that fault message is also reached into central monitoring position, by artificial judgment abort situation, such as Shanghai Communications University proposes to install failure probe detection phase fault signal on branch line, and is divided by being mounted on circuit Monitoring center is passed in wireless receiving and dispatching substation at branch;The low pressure that Laiwu Power Supply Company, Yi Gete Power Electronics Co., Ltd.s propose The distribution line fault monitoring system etc. that distribution network fault positioning device, Jiangsu Winet Electric Incorporated Co., Ltd. propose.
Unit style framework of powering is directed to the power supply point of each power supply unit, it is desirable that at least from two different substations or The load of the different bus section, busbar section of same substation, each substation should keep in balance as possible, avoid the occurrence of heavy duty or underloading main transformer, And single rack of " handing in hand " is basically applied to the control strategy of power distribution network both at home and abroad at present, traditional control strategy without Method meets the requirement of unit style construction for electricity.
Invention content
In view of the deficienciess of the prior art, that it is an object of the present invention to provide a kind of calculation amounts is few, analyze speed is fast based on The Fault Isolation of unit style power distribution network and service restoration method.
To achieve the goals above, the present invention is to realize by the following technical solutions:
A kind of Fault Isolation based on unit style power distribution network and service restoration method, including following steps:
Step (1) traverses power load table and supply load table, judges whether power load is equal with supply load, if Power load is equal with supply load, then terminates;If power load is unequal with supply load, step (2) is turned to;
Step (2) traverses busbar and switch list, by positioning overcurrent protective switch, while detecting interconnection switch state, uses In fault point and isolated fault point;
Step (3) traverses supply path table, judges whether there is supply path, if without supply path, turns to step (5);If there is supply path, then step (4) is turned to;
Step (4) judges whether power supply capacity is more than or equal to power load, if power supply capacity is more than or equal to power load, Then turn to step (7);If power supply capacity is less than power load, step (5) is turned to;
Step (5) traverses stand-by power supply routing table, judges whether there is stand-by power supply path, if there is stand-by power supply path, Step (6) is then turned to, if it is not, terminating;
Step (6) judges whether stand-by power supply capacity is more than or equal to power load, if stand-by power supply capacity is more than or equal to Power load then turns to step (7);If stand-by power supply capacity is less than power load, terminate;
Step (7) restores electricity, and then terminates.
By step (3)-(6), the opening and closing state of interconnection switch and busbar sectional izing switch is switched over to change network Topology, to influence the distribution of the trend in network, is finally reached network weight to realize the transfer load between feeder line or substation The purpose of structure and the optimization network operation.Step (2) completes Fault Isolation by the switching between various switches in distribution system With the target of recovery operation.
The Fault Isolation based on unit style power distribution network of the present invention can make system in distribution network with service restoration method It when breaking down, completes the reconstruct of distribution network and resumes work, and initial power supply can be restored to when the failure clears Operating status.
Description of the drawings
Fig. 1 is a kind of Fault Isolation based on unit style power distribution network and service restoration method work flow diagram of the present invention;
Fig. 2 is an actual unit style power distribution network power supply unit.
Specific implementation mode
To make the technical means, the creative features, the aims and the efficiencies achieved by the present invention be easy to understand, with reference to Specific implementation mode, the present invention is further explained.
Referring to Fig. 1, a kind of Fault Isolation based on unit style power distribution network of the invention is specifically included with service restoration method Following steps:
Step (1) traverses power load table and supply load table, judges whether power load is equal with supply load, if Power load is equal with supply load, then terminates;If power load is unequal with supply load, step (2) is turned to;
Step (2) traverses busbar and switch list, by positioning overcurrent protective switch, while detecting interconnection switch state, uses In fault point and isolated fault point;
Step (3) traverses supply path table, judges whether there is supply path, if without supply path, turns to step (5);If there is supply path, then step (4) is turned to;
Step (4) judges whether power supply capacity is more than or equal to power load, if power supply capacity is more than or equal to power load, Then turn to step (7);If power supply capacity is less than power load, step (5) is turned to;
Step (5) traverses stand-by power supply routing table, judges whether there is stand-by power supply path, if there is stand-by power supply path, Step (6) is then turned to, if it is not, terminating;
Step (6) judges whether stand-by power supply capacity is more than or equal to power load, if stand-by power supply capacity is more than or equal to Power load then turns to step (7);If stand-by power supply capacity is less than power load, terminate;
Step (7) restores electricity, and then terminates.
Traversing ending can terminate.
First, the embodiment of the present invention is being described the part noun occurred in the process or term suitable for following solution It releases:
SK refers to power switch, and this switch is connected to substation, is exported and is powered by substation.
UK, refers to user's switch, and this switch is connected to user's lateral load or buckling.
LK refers to interconnection switch, and this switch is connected to interconnection box between other switching stations or switching station.
BK refers to bus-tie circuit breaker, and this switch is in a certain switching station's internal bus block switch.
Referring to Fig. 2, according to the method for the present invention, the contact between the squares Heng Yu switching station and the squares Heng Yu east 1# switching stations is opened It closes Lk1 to break down disconnections, the interconnection switch Lk2 of the opposite ends Lk1 also dead electricity, by the squares the Heng Yu east 1# switching stations right side of Lk2 power supplies The bus section, busbar section dead electricity of side.Bus section, busbar section on the right side of the 1# switching stations of the squares Heng Yu east is because of Fault Isolation.Then control unit by searching for Stand-by power supply table obtains the power margin of the bus-tie circuit breaker BK1 on the left of the 1# switching stations of the squares Heng Yu east, disclosure satisfy that after detection The bus-tie circuit breaker BK1 of the power load of bus section, busbar section on the right side of the 1# switching stations of the squares Heng Yu east, the squares Heng Yu east 1# switching stations closes a floodgate Electricity consumption restores in power supply, the squares Heng Yu east 1# switching stations.
The present invention is based on the communication of logic unit, when a certain feeder line breaks down in system, can be carried out by communication contact Fault location coordinates separating brake, by fault point and isolation of system by two end switch.The chained list knot of net is prepared by analytic unit Structure traverses switch list, obtains switch current state, carries out the meter of correlation table automatically in conjunction with average load trend size and direction It calculates, automatically updates each switch power variation, and load transfer judgement is carried out according to power load table and stand-by power supply table, pass through meter The power supply redundancy of Suan Ge supply lines is realized that power supply is automatic and is restored according to the switching for turning to be switched for analysis result.
All there are one logical terminal (LTERM)s for every bus section, busbar section.By the interaction of logical terminal (LTERM) in system, system can be in distribution network The reconstruct of distribution network is completed when breaking down and is resumed work, and can be restored to initial power supply when the failure clears and be transported Row state.
It is switched over by the opening and closing state to interconnection switch and busbar sectional izing switch to change network topology, to realize The transfer load between feeder line or substation is finally reached network reconfiguration and optimization net to influence the distribution of the trend in network The purpose of network operation.
The target of Fault Isolation and recovery operation is completed by the switching between various switches in distribution system.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its Equivalent thereof.

Claims (1)

1. a kind of Fault Isolation based on unit style power distribution network and service restoration method, which is characterized in that including following step Suddenly:
Step (1) traverses power load table and supply load table, judges whether power load is equal with supply load, if electricity consumption Load is equal with supply load, then terminates;If power load is unequal with supply load, step (2) is turned to;
Step (2) traverses busbar and switch list, by positioning overcurrent protective switch, while detecting interconnection switch state, for fixed Position fault point and isolated fault point;
Step (3) traverses supply path table, judges whether there is supply path, if without supply path, turns to step (5); If there is supply path, then step (4) is turned to;
Whether the power supply capacity of the supply path in step (4) judgment step (3) is more than or equal to power load, if power supply capacity More than or equal to power load, then step (7) is turned to;If power supply capacity is less than power load, step (5) is turned to;
Step (5) traverses stand-by power supply routing table, judges whether there is stand-by power supply path, if there is stand-by power supply path, then turns To step (6), if it is not, terminating;
Step (6) judges whether stand-by power supply capacity is more than or equal to power load, if stand-by power supply capacity is more than or equal to electricity consumption Load then turns to step (7);If stand-by power supply capacity is less than power load, terminate;
Step (7) restores electricity, and then terminates.
CN201610747768.4A 2016-08-29 2016-08-29 A kind of Fault Isolation based on unit style power distribution network and service restoration method Active CN106300339B (en)

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Publication number Priority date Publication date Assignee Title
CN108631298A (en) * 2018-03-30 2018-10-09 国电南瑞科技股份有限公司 A kind of unit style distribution network restoration strategy-generating method based on load balancing distribution
CN110460051A (en) * 2019-09-25 2019-11-15 广东稳峰电力科技有限公司 A kind of medium voltage distribution network contact method and system based on net capability

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CN101459337A (en) * 2008-12-30 2009-06-17 上海慧伦电气有限公司 Stabilized control system capable of accurately cut load selection according to load path
CN102088209A (en) * 2011-03-15 2011-06-08 河海大学 Self-healing control method of distribution network
CN103457263A (en) * 2013-09-17 2013-12-18 国家电网公司 Intelligent active power distribution network reestablishing method based on largest power supply capacity

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US7979222B2 (en) * 2008-10-14 2011-07-12 Abb Research Ltd. Short-term load forecasting based capacity check for automated power restoration of electric distribution networks
EP2575230B1 (en) * 2011-09-30 2018-11-07 ABB Research Ltd. Systems and methods for integrating demand response with service restoration in an electric distribution system

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
CN101459337A (en) * 2008-12-30 2009-06-17 上海慧伦电气有限公司 Stabilized control system capable of accurately cut load selection according to load path
CN102088209A (en) * 2011-03-15 2011-06-08 河海大学 Self-healing control method of distribution network
CN103457263A (en) * 2013-09-17 2013-12-18 国家电网公司 Intelligent active power distribution network reestablishing method based on largest power supply capacity

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Address after: 210061 No. 20 Gaoxin Road, Nanjing High-tech Zone, Jiangsu Province

Patentee after: NARI TECHNOLOGY Co.,Ltd.

Patentee after: STATE GRID NARI NANJING CONTROL SYSTEM Co.,Ltd.

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