CN103048587A - Method, device and system for positioning faults of power distribution network with distributed power supply - Google Patents

Method, device and system for positioning faults of power distribution network with distributed power supply Download PDF

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Publication number
CN103048587A
CN103048587A CN2012105334917A CN201210533491A CN103048587A CN 103048587 A CN103048587 A CN 103048587A CN 2012105334917 A CN2012105334917 A CN 2012105334917A CN 201210533491 A CN201210533491 A CN 201210533491A CN 103048587 A CN103048587 A CN 103048587A
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fault
distribution network
zone
power distribution
signal
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CN103048587B (en
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黄颖祺
徐铭
余鹏
郭子健
李艳
徐旭辉
戚鑫
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Shenzhen Power Supply Bureau Co Ltd
Integrated Electronic Systems Lab Co Ltd
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Shenzhen Power Supply Bureau Co Ltd
Integrated Electronic Systems Lab Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
    • Y04S10/52Outage or fault management, e.g. fault detection or location

Abstract

The invention relates to a method, a device and a system for positioning faults of a power distribution network with a distributed power supply, and belongs to the field of power system distribution automation. The method for positioning the faults comprises the following steps that: a distribution automation master station system establishes a memory topology of power distribution network primary equipment through a power distribution network topology model; and when a distribution network feeder is in fault, terminal equipment locally judges the fault current direction and sends to the main station system, and the main station system determines a fault region and edge equipment according to a fault signal and the fault current direction, so as to achieve an effect of rapidly positioning the fault regions of the power distribution network.

Description

Fault Locating Method, Apparatus and system with power distribution network of distributed power source
Technical field
The invention belongs to electric system power distribution automation field, have Fault Locating Method, device and the corresponding system of the power distribution network of distributed power source.
Background technology
Build in the process of intelligent grid in China, the application scale of distributed power source (microgrid) constantly enlarges, power distribution network changes to the horizontal networks that spreads all over power supply from vertical radiant type network, traditional FEEDER AUTOMATION can't adapt to the fault handling requirement under the distributed power source condition, need a kind of effective Fault Locating Method badly, when trend two-way flow network breaks down, accurately locate the fault zone, for the operations such as follow-up fault isolation, non-fault zone restore electricity provide scientific basis.
Summary of the invention
Technical matters to be solved by this invention is, a kind of Fault Locating Method, device and corresponding system with power distribution network of distributed power source is provided, and can locate fast the fault zone.
In order to solve the problems of the technologies described above, the one side of embodiments of the invention provides a kind of Fault Locating Method with power distribution network of distributed power source, comprises the steps:
When breaking down, each the terminal device failure judgement direction of current in the described power distribution network also reports main station system with fault-signal by feeder line;
Main station system is according to the fault-signal that send on each terminal device of described feeder line and fault current direction, and at least one in a plurality of zones of determining to divide in advance is the fault zone, and determines the edge device of described fault zone.
Wherein, described main station system is according to the fault-signal that send on described each terminal device and fault current direction, and at least one in a plurality of zones of determining to divide in advance is specially for the step of fault zone:
According to the topological structure of power distribution network, according to the annexation between each switch on the distribution network line, take the switch that detects fault current as the border, distribution line is divided into a plurality of zones;
According to fault-signal signal and the fault current direction that each terminal device reports, determine the fault current direction on each regional boundary switch;
Judge the direction of the fault current on the boundary switch on each zone, if certain zone only has the fault current of inflow, and do not have the fault current that flows out, judge that then this zone is place, trouble spot section.
Wherein, the described step that distribution line is divided into a plurality of zones is specially:
At least two adjacent switches that can detect fault current are divided into a zone.
Wherein, further comprise:
Described main station system receives fault-signal and the direction of current that the terminal device on many feeder lines reports simultaneously, and the fault on every feeder line is positioned.
Wherein, according to the topological structure of power distribution network, according to the annexation between each switch on the distribution network line, take the switch that detects fault current as the border, the step that distribution line is divided into a plurality of zones is specially;
Main station system is set up the topological model of each feeder line on the described power distribution network, and described topological model is contained all terminal devices on the described feeder line of described distribution network system, and correctly describes the topological connection relation between the described equipment;
The described switch that detects fault current as the border, is divided into a plurality of zones with described topography module, and each zone comprises two adjacent switches at least.
Correspondingly, another aspect of the present invention provides a kind of fault locator with power distribution network of distributed power source, comprising:
The fault-signal receiving element be used for to receive fault-signal and fault current direction that each terminal device of power distribution network reports by feeder line;
The localization process unit is used for according to the fault-signal that send on each terminal device of described feeder line and fault current direction, and at least one in a plurality of zones of determining to divide in advance is the fault zone, and determines the edge device of described fault zone.
Wherein, described localization process unit comprises:
Topology area is divided subelement, is used for the topological structure with power distribution network, according to the annexation between each switch on the distribution network line, take the switch that detects fault current as the border, distribution line is divided into a plurality of zones;
The zone electric current is determined subelement, for the fault-signal signal and the fault current direction that report according to each terminal device, determines the fault current direction on each regional boundary switch;
Subelement is judged in the fault zone, is used for judging the direction of the fault current on the boundary switch on each zone, if certain zone only has the fault current of inflow, and not have the fault current of outflow, judges that then this zone is place, trouble spot section.
Wherein, described topology area is divided each zone that subelement divides and is comprised at least two adjacent switches that can detect fault current.
Wherein, further comprise:
Described fault-signal receiving element can receive fault-signal and the direction of current that the terminal device on many feeder lines reports simultaneously, and described localization process unit can position the fault on every feeder line.
Correspondingly, the again one side of enforcement of the present invention, a kind of fault location system with power distribution network of distributed power source is provided, described power distribution network comprises main station system, the terminal device that is connected with described main station system by feeder line, described terminal device can be to main station system reporting fault signal and direction of current, and wherein, described main station system comprises aforesaid fault locator.
Implement embodiments of the invention, have following beneficial effect:
1, can utilize the power distribution network topological model of the power distribution automation main station system of having built up, not need the repetition modeling, can greatly reduce investment and maintenance cost;
2, clear, the accuracy of judgement of the method principle is easy to study and grasps, and the variation of the distribution network method of operation is had very strong adaptability;
3, the method also can be finished localization of fault in the situation of partial fault loss of learning, and stronger fault-tolerance is arranged;
4, support that multithreading calls, can process simultaneously the fault of many different feeder lines.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of fault locator that has the power distribution network of distributed power source in the one embodiment of the invention;
Fig. 2 is the schematic flow sheet of Fault Locating Method that has the power distribution network of distributed power source in the one embodiment of the invention;
Fig. 3 is the power distribution network topological model partial schematic diagram in the one embodiment of the invention.
Embodiment
Below with reference to accompanying drawing the preferred embodiments of the present invention are described.
A kind of fault location system with power distribution network of distributed power source that the present invention proposes, wherein, described power distribution network comprises main station system, and by the terminal device that feeder line is connected with described main station system, described terminal device can be to main station system reporting fault signal and direction of current.Wherein, this main station system can be connected with many feeder lines, and every feeder line is associated with a plurality of terminal devices.This main station system further includes fault locator.To fault locator, can be with reference to detailed description hereinafter.
As shown in Figure 1, be the structural representation of the fault locator in the one embodiment of the invention.Described fault locator 1 comprises:
Fault-signal receiving element 10 be used for to receive fault-signal and fault current direction that each terminal device of power distribution network reports by feeder line;
Localization process unit 12 is used for according to the fault-signal that send on each terminal device of described feeder line and fault current direction, and at least one in a plurality of zones of determining to divide in advance is the fault zone, and determines the edge device of described fault zone.
Wherein, described localization process unit 12 comprises:
Topology area is divided subelement 120, is used for the topological structure with power distribution network, according to the annexation between each switch on the distribution network line, take the switch that detects fault current as the border, distribution line is divided into a plurality of zones;
The zone electric current is determined subelement 121, for the fault-signal signal and the fault current direction that report according to each terminal device, determines the fault current direction on each regional boundary switch;
Subelement 122 is judged in the fault zone, is used for judging the direction of the fault current on the boundary switch on each zone, if certain zone only has the fault current of inflow, and not have the fault current of outflow, judges that then this zone is place, trouble spot section.
Wherein, described topology area is divided each zone that subelement 120 divides and is comprised at least two adjacent switches that can detect fault current.
Wherein, further comprise:
Described fault-signal receiving element 10 can receive fault-signal and the direction of current that the terminal device on many feeder lines reports simultaneously, and described localization process unit 12 can position the fault on every feeder line.
As shown in Figure 2, be the process flow diagram of the Fault Locating Method in the one embodiment of the invention.Be described in conjunction with Fig. 3 in the lump.
The method comprises:
Step S21, when fault occured in power distribution network, each the terminal device failure judgement direction of current in the described power distribution network also reported main station system with fault-signal by feeder line;
Then, main station system is according to the fault-signal that send on each terminal device of described feeder line and fault current direction, and at least one in a plurality of zones of determining to divide in advance is the fault zone, and determines the edge device of described fault zone.
Comprise the steps: particularly
Step S22 according to the topological structure of power distribution network, according to the annexation between each switch on the distribution network line, take the switch that detects fault current as the border, is divided into a plurality of zones with distribution line; At first, main station system is set up the topological model of each feeder line on the described power distribution network, and described topological model is contained all terminal devices on the described feeder line of described distribution network system, and correctly describes the topological connection relation between the described equipment; Then, the described switch that detects fault current as the border, is divided into a plurality of zones with described topography module, each zone comprises two adjacent switches at least; As shown in Figure 3, it is the Local map of the topological model of a feeder line, wherein, node 1 and node 8 are the primary power point, node 2,3,4,5,6,7,8,9 is switching node, and node 10 is the distributed electrical source node, includes some terminal settings between each switching node, for convenience of explanation, these terminal devices in this figure, have been omitted; Wherein, two switching nodes can be divided into a zone, particularly, can mark off zone (2,3), zone (3,4), zone (2,4), zone (3,5), zone (5,6), zone (6,7), zone (4, a plurality of zones such as 9), be understandable that, in other example, also plural adjacent switching node can be divided into a zone.
Step S23, the fault-signal signal and the fault current direction that report according to each terminal device, determine the fault current direction on each regional boundary switch, take Fig. 3 as example, wherein arrow represents the direction of fault current, then the border in zone (2,3) namely has the fault current of inflow also to have the fault current of outflow;
Step S24, judge the direction of the fault current on the boundary switch on each zone, if certain zone only has the fault current of inflow, and do not have the fault current that flows out, judge that then this zone is place, trouble spot section, in Fig. 3, each zone is judged, find to only have the fault current of inflow in the zone (4,9), and do not have the fault current of outflow, so can determinating area (4,9) be the fault zone, then can carry out the step of follow-up fault handling, for example with zone (4,9) carry out isolated operation, other non-fault zones restore electricity etc.
Be understandable that described main station system receives fault-signal and the direction of current that the terminal device on many feeder lines reports simultaneously, and the fault on every feeder line is positioned.
To sum up, can find out from embodiment provided by the invention, method of the present invention is by passing through the power distribution network topological model in the power distribution automation main station system, set up the internal memory topology of power distribution network primary equipment, utilize feeder fault signal and the fault current direction sent on the distribution network terminal Real-time Collection, drive the power distribution automation main station system and locate fast the fault zone by the internal memory topological model, for the operations such as follow-up fault isolation, non-fault zone restore electricity provide scientific basis.
Implement embodiments of the invention, have following beneficial effect:
1, can utilize the power distribution network topological model of the power distribution automation main station system of having built up, not need the repetition modeling, can greatly reduce investment and maintenance cost;
2, clear, the accuracy of judgement of the method principle is easy to study and grasps, and the variation of the distribution network method of operation is had very strong adaptability;
3, the method also can be finished localization of fault in the situation of partial fault loss of learning, and stronger fault-tolerance is arranged;
4, support that multithreading calls, can process simultaneously the fault of many different feeder lines.
Above disclosed is preferred embodiment of the present invention only, certainly can not limit with this interest field of the present invention, so equivalent variations, still belongs to the scope that the present invention is contained.

Claims (10)

1. the Fault Locating Method with power distribution network of distributed power source is characterized in that, comprises the steps:
When breaking down, each the terminal device failure judgement direction of current in the described power distribution network also reports main station system with fault-signal by feeder line;
Main station system is according to the fault-signal that send on each terminal device of described feeder line and fault current direction, and at least one in a plurality of zones of determining to divide in advance is the fault zone, and determines the edge device of described fault zone.
2. Fault Locating Method as claimed in claim 1, it is characterized in that, described main station system is according to the fault-signal that send on described each terminal device and fault current direction, and at least one in a plurality of zones of determining to divide in advance is specially for the step of fault zone:
According to the topological structure of power distribution network, according to the annexation between each switch on the distribution network line, take the switch that detects fault current as the border, distribution line is divided into a plurality of zones;
According to fault-signal signal and the fault current direction that each terminal device reports, determine the fault current direction on each regional boundary switch;
Judge the direction of the fault current on the boundary switch on each zone, if certain zone only has the fault current of inflow, and do not have the fault current that flows out, judge that then this zone is place, trouble spot section.
3. Fault Locating Method as claimed in claim 2 is characterized in that, the described step that distribution line is divided into a plurality of zones is specially:
At least two adjacent switches that can detect fault current are divided into a zone.
4. such as each described Fault Locating Method of claims 1 to 3, it is characterized in that, further comprise:
Described main station system receives fault-signal and the direction of current that the terminal device on many feeder lines reports simultaneously, and the fault on every feeder line is positioned.
5. Fault Locating Method as claimed in claim 4, it is characterized in that, according to the topological structure of power distribution network, according to the annexation between each switch on the distribution network line, take the switch that detects fault current as the border, the step that distribution line is divided into a plurality of zones is specially;
Main station system is set up the topological model of each feeder line on the described power distribution network, and described topological model is contained all terminal devices on the described feeder line of described distribution network system, and correctly describes the topological connection relation between the described equipment;
The described switch that detects fault current as the border, is divided into a plurality of zones with described topography module, and each zone comprises two adjacent switches at least.
6. the fault locator with power distribution network of distributed power source is characterized in that, comprising:
The fault-signal receiving element be used for to receive fault-signal and fault current direction that each terminal device of power distribution network reports by feeder line;
The localization process unit is used for according to the fault-signal that send on each terminal device of described feeder line and fault current direction, and at least one in a plurality of zones of determining to divide in advance is the fault zone, and determines the edge device of described fault zone.
7. fault locator as claimed in claim 6 is characterized in that, described localization process unit comprises:
Topology area is divided subelement, is used for the topological structure with power distribution network, according to the annexation between each switch on the distribution network line, take the switch that detects fault current as the border, distribution line is divided into a plurality of zones;
The zone electric current is determined subelement, for the fault-signal signal and the fault current direction that report according to each terminal device, determines the fault current direction on each regional boundary switch;
Subelement is judged in the fault zone, is used for judging the direction of the fault current on the boundary switch on each zone, if certain zone only has the fault current of inflow, and not have the fault current of outflow, judges that then this zone is place, trouble spot section.
8. fault locator as claimed in claim 7 is characterized in that, each zone that described topology area division subelement is divided comprises two adjacent switches that can detect fault current at least.
9. such as each described fault locator of claim 6 to 8, it is characterized in that, further comprise:
Described fault-signal receiving element can receive fault-signal and the direction of current that the terminal device on many feeder lines reports simultaneously, and described localization process unit can position the fault on every feeder line.
10. fault location system with power distribution network of distributed power source, described power distribution network comprises main station system, the terminal device that is connected with described main station system by feeder line, described terminal device can be to main station system reporting fault signal and direction of current, it is characterized in that described main station system comprises such as each fault locator of claim 6 to 9.
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