System and method for positioning medium voltage distribution network using power line carrier communication

A technology of power line carrier and positioning system, applied in the direction of information technology support system, fault location, etc., can solve the problems affecting the reliability and accuracy of the selection principle, difficulty in practical application, signal distortion, etc., and achieve economical and practical operation cost and real-time performance Good and reliable effect

Inactive Publication Date: 2010-10-27
上海市南供电设计有限公司 +1
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  • Abstract
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Problems solved by technology

In view of the characteristics of the small current grounding system, when subjected to electromagnetic interference and harmonic pollution, the signal may be distorted, affecting the reliabi

Method used

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  • System and method for positioning medium voltage distribution network using power line carrier communication
  • System and method for positioning medium voltage distribution network using power line carrier communication
  • System and method for positioning medium voltage distribution network using power line carrier communication

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[0039] The present invention will be further described below in conjunction with the drawings.

[0040] See figure 1 , The figure shows a medium-voltage distribution network positioning system using power line carrier communication according to one of the present invention, including several nodes S arranged on the medium-voltage distribution network, each node S has a number and when a fault occurs The corresponding fault information also includes the carrier communication network 1 connected to the node S and the host control and processing system 2 connected to the carrier communication network 1, where:

[0041] Each node S processes the fault information and sends the number of the node to the host control and processing system 2 through the carrier communication network 1. An online monitoring and measurement module (not shown in the figure) is installed on each node S, The online monitoring and measurement module realizes zero-sequence current measurement, data processing an...

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Abstract

The invention discloses a system and a method for positioning a medium voltage distribution network using power line carrier communication. The system comprises a plurality of nodes, and each node has number and fault information; and the system also comprises a carrier communication network connected with the nodes and a host controlling and processing system connected with the carrier communication network. The method comprises the following steps of: inputting, acquiring, judging whether a zero sequence voltage is greater than a threshold value, judging whether a fault exists and whether the fault is a false grounding fault, judging a neutral point grounding mode and positioning fault points by adopting different methods for positioning fault zones. The system uses the power line carrier communication technology as main means of fault information transmission and distribution network communication, has the advantages of economy, practicability, strong adaptability, simple channel maintenance and high reliability, has openness and compatibility, can be used as a common channel by each distributed automatic subsystem, meets various demands of distribution network management, greatly reduces the investment, and accurately positions the fault points through least square.

Description

technical field [0001] The invention relates to a medium-voltage distribution network positioning system and method, in particular to a medium-voltage distribution network positioning system and method using power line carrier communication. technical background [0002] The medium-voltage distribution network mostly has mixed lines of overhead lines and cables, as well as branch lines. The network structure is complex, and most of the line faults are single-phase ground faults. In the small current grounding operation mode, due to the weak current of single-phase ground fault (commonly known as small current ground fault), the system can run for a period of time after the fault occurs. Therefore, the small current grounding operation mode can significantly improve the reliability of power supply, and also has The advantage of less interference to the same-sex system. But long-term operation with faults, especially when there are intermittent arc-flash ground faults, overvo...

Claims

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Application Information

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IPC IPC(8): G01R31/08
CPCY04S10/522Y04S10/52
Inventor 蔡旭高伟国陈海昆戴军瑛张君王彤
Owner 上海市南供电设计有限公司
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