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Comprehensive fault location method for smart distribution network

A smart distribution network and comprehensive fault technology, applied to electrical components, emergency protection circuit devices, etc., can solve problems such as low work efficiency, manual operation, low accuracy, etc., to reduce the number of power outages, reduce the impact, and quickly restore power supply Effect

Active Publication Date: 2019-04-30
湖南世优电力科技股份有限公司
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Problems solved by technology

[0003] The existing distribution network fault location methods have the defects of low work efficiency, low accuracy and manual operation

Method used

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  • Comprehensive fault location method for smart distribution network
  • Comprehensive fault location method for smart distribution network
  • Comprehensive fault location method for smart distribution network

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Embodiment Construction

[0044] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0045] Such as figure 1 As shown, a comprehensive fault location method for smart distribution network includes the following steps:

[0046] Step 1: Use the smart terminal to detect whether the distribution network is in normal operation, if not, enter the peer-to-peer network protection program. The abnormal state of the power grid includes short circuit and voltage loss, and the inspection criteria are:

[0047] a. Short-circuit current setting:

[0048]

[0049] In the formula, I is the measured value of the line current; I k.op is the short-circuit current action value; E is the phase electromotive force of the system; Z s is the line impedance between the smart terminal and the substation; Z k is the impedance between the smart terminal and the neighbor terminal; K rel is reliability factor, K rel = 1.2;

[0050] b. Loss of pressure jud...

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Abstract

The invention discloses an integrated fault location method for an intelligent distribution network. The method comprises the following steps: step 1, detecting that the distribution network is under an abnormal running state, and entering a peer-to-peer network protection program; performing fault location and fault isolation by an intelligent terminal; performing fault location by a master station; and checking whether the results of twice fault location are consistent, orderly performing fault isolation, and judging whether the fault isolation is successful according to the isolated power grid state, so as to judge whether the fault location of the intelligent terminal and the master station is accurate. The integrated fault location method for the intelligent distribution network provided by the invention performs the fault location through the mutual verification between the intelligent terminal and the master station, can detect, prevent and isolate all kinds of potential hidden dangers timely during the operation of the distribution network, optimize the operation state of a system and effectively deal with various disturbances occurring in the system, so that the power grid can maintain the continuous operation of the system under the fault condition, repair the fault autonomously and quickly restore the power supply.

Description

technical field [0001] The invention relates to a comprehensive fault location method for an intelligent distribution network. Background technique [0002] Smart distribution network self-healing control is the core technology to solve the key problems of low equipment utilization, low power supply reliability, and high line loss rate that have existed in my country's distribution network for a long time. It is an inevitable choice for the development of modern power grid technology. The earliest self-healing control in the power distribution system is the Feeder Automation (FA) technology, that is, the automation of the feeder line from the outgoing line of the substation to the user's electrical equipment. The core content of feeder automation technology is fault detection, fault isolation, load transfer and power supply recovery control of distribution network under accident state. Distribution Automation (DA) technology is based on feeder automation, combined with dist...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/26
CPCH02H7/262H02H7/263H02H7/267
Inventor 陈春王炜宇邹勇军姜鹏
Owner 湖南世优电力科技股份有限公司
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