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Adaptive fault section positioning method of power distribution network containing distributed power supply

A technology of distributed power supply and fault section, which is applied in the direction of fault location, fault detection according to conductor type, and electrical measurement, which can solve the problems of insufficient adaptability and achieve good adaptability and versatility

Active Publication Date: 2016-07-13
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to propose a self-adaptive fault section suitable for the distribution network containing distributed power in view of the insufficient self-adaptability existing in the fault location method of the distribution network containing distributed power positioning method

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  • Adaptive fault section positioning method of power distribution network containing distributed power supply
  • Adaptive fault section positioning method of power distribution network containing distributed power supply
  • Adaptive fault section positioning method of power distribution network containing distributed power supply

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Embodiment Construction

[0193] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0194] figure 1 It is a schematic diagram of the method of the present invention. In a distribution network containing distributed generation, under the condition that all line parameters in the distribution network containing distributed generation are known, such as figure 1 As shown, step 001 is first executed to divide the distribution network containing distributed power into multiple double-ended non-branch sections, and number each node and section in the distribution network containing distributed power. Then, step 002 is executed to collect information in each section of the distribution network containing distributed power, and step 003 is executed to perform phase-to-mode transformation on the electrical quantity in the section, and convert the coupled electrical quantity in the section into The moduli are independent of each other...

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Abstract

The invention relates to an adaptive fault section positioning method of a power distribution network containing a distributed power supply, and the power distribution network containing the distributed power supply is divided into a plurality of sections with no branches at double ends. Under the condition of knowing line parameters of all the sections, voltage and current information at nodes of both ends of each section is collected, mode voltage, mode current and mode parameters of a line at the nodes are obtained through phase-mode transformation, and Fourier transform is performed on node mode current to obtain a node mode current phase angle. No-load detection of a line and differential current detection of mode current of a section are utilized, only under the condition that the line in the section is loaded and mode current differential current of the section is overflowing is fault judgment of the section started, and through comparison of a mode current phase angle difference value absolute value of the section with a judgment threshold value, a fault judgment result of the section is obtained. Fault judgment results of all the sections in the power distribution network containing the distributed power supply are utilized to generate a system fault judgment matrix, and through judgment of element values in the system fault judgment matrix, the section where a fault point is is obtained.

Description

technical field [0001] The invention relates to a method for locating a fault section of a distribution network with a distributed power supply. Background technique [0002] The distribution network fault location technology can accurately find out the location of the fault after the distribution network fault, which is conducive to the accurate isolation of the distribution network fault and the rapid and timely maintenance and treatment. At the same time, the accurate location of the distribution network fault is also a prerequisite for the restoration of the power supply of the distribution network after the fault. Therefore, distribution network fault location technology has an important significance and effect on the safe, stable and efficient operation of the entire distribution network. [0003] With the maturity of distributed generation technology and the progress of micro-grid operation control technology, more and more distributed generators (Distributed Generat...

Claims

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Application Information

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IPC IPC(8): G01R31/08
CPCG01R31/086G01R31/088Y04S10/52
Inventor 牛耕周龙裴玮齐智平
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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