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Fault-tolerant fault positioning method for distribution network

A technology for distribution network faults and phase faults, applied in the fault location and other directions, can solve the problems of inability to locate, miss or misreport fault information, limit the practicability of distribution networks, etc., to improve accuracy and pertinence. Effect

Active Publication Date: 2012-07-11
SHAANXI ELECTRIC POWER RES INST +6
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Problems solved by technology

[0003] However, in reality, since the distribution equipment, distribution automation system and communication network are all working in harsh outdoor environments, it is easy to miss or misreport fault information. The existing distribution network fault location algorithm has errors in fault information The correct positioning results cannot be obtained under the conditions of false positive or false negative, which largely limits the practicability of using distribution automation systems for fault location in distribution networks.

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  • Fault-tolerant fault positioning method for distribution network

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Embodiment Construction

[0019] The content of the invention will be further described below in conjunction with the accompanying drawings and examples.

[0020] Step 1 of the present invention: After a fault occurs, firstly, the master station collects the fault current information of each feeder switch a, b, c three-phase phase and the zero-sequence voltage information at the busbar, and the fault current information includes the maximum fault current amplitude and At the time of the maximum fault current, if the fault current information reported by a certain phase of a certain switch X is received, the phase fault information flag of the switch is defined as 1, otherwise, the phase fault information flag of the switch is defined as 0;

[0021] For a typical distribution line as shown in the accompanying drawing (a), it is assumed that a short-circuit fault between phases a-b occurs in the area surrounded by switches B and G, resulting in S 1 Tripping, as shown in the accompanying drawing (b), the ...

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Abstract

The invention relates to a fault-tolerant fault positioning method for a distribution network. The method comprises the following steps: judging if the reported fault information is mistakenly reported and omitted, by utilizing the relevance of the multi-phase fault current peak value and fault moment of each switch reported by an automatic terminal for power distribution after a fault occurs and utilizing a zero sequence voltage criterion, and correcting the mistakenly reported and omitted fault information, thereby realizing the fault-tolerant fault positioning for the distribution network. According to the method provided by the invention, the relevance of a fault current is fully utilized and a bus zero sequence voltage criterion is introduced, so that no complex operation is required, the method is simple and practical, the accuracy of judgment is ensured and the problem of fault-tolerant fault positioning of the distribution network is efficiently solved.

Description

technical field [0001] The invention relates to the field of fault processing of distribution networks, in particular to a fault-tolerant method for fault location of distribution networks. Background technique [0002] The rapid and scientific treatment of distribution network faults is of great significance for improving the reliability of power supply of distribution network and realizing the economical and reliable operation of distribution network. For a long time, a lot of research work has been carried out in the field of fault handling of distribution network at home and abroad, and remarkable results have been obtained. The distribution automation system can use the corresponding algorithm to locate and restore the fault according to the fault information reported by each feeder automation terminal collected when the fault occurs. This technology is relatively mature in theory. [0003] However, in reality, since the distribution equipment, distribution automation ...

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Application Information

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IPC IPC(8): G01R31/08
Inventor 刘健盛万兴徐石明董新洲陈星莺王宏安
Owner SHAANXI ELECTRIC POWER RES INST
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