Method and device for locating high-resistance ground fault section of distribution network, and storage medium

A high-resistance ground fault and section positioning technology, which is applied to the fault location, measuring device, and fault detection according to the conductor type, can solve the problems of easy misjudgment and weak ability to withstand transition resistance, so as to improve accuracy, Strong applicability and reduced difficulty
CN110542832AInactive Publication Date: 2019-12-06ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
Publication Date
2019-12-06
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention discloses a method and device for locating a high-resistance ground fault section of a distribution network, and a storage medium. The method for locating the high-resistance ground fault section of the distribution network comprises the following steps: obtaining zero-sequence current and voltage recording data of each fault location terminal; calculating the average value of the absolute value of the ratio of the current integral value and the voltage difference value collected by each terminal according to the zero-sequence current and voltage recording data; calculating the average value ratio of each terminal and the subsequent terminal according to the average value, and determining the size of the average value ratio and a preset setting threshold; and recording the average value ratio and the terminal number when the average value ratio is greater than the setting threshold, and determining that the ground fault section is the section between the terminal corresponding to the number and the subsequent terminal according to the number, so that the section determination result is obtained. The invention has strong applicability, can be applied to different faultlocations and different transition resistances, can effectively improve the accuracy of determining the fault section, can effectively reduce the difficulty of fault location and reduce errors, and has low cost and a high engineering application value.
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Description

technical field

[0001] The invention relates to the technical field of power system fault detection, in particular to a method, a device and a storage medium for locating a high-resistance ground fault section of a distribution network. Background technique

[0002] The fault location of distribution network is of great significance to the study of distribution network faults. Efficient and accurate fault location methods are conducive to improving the reliability of distribution network power supply. At present, the research on fault analysis and location of the transmission network has been relatively complete, but for the distribution network, due to its complex structure, there are problems such as multi-level branches, ring networks, short line distances, and different grounding methods, which greatly increase This increases the difficulty of fault location, especially for high-resistance ground faults, and the difficulty of fault location is even greater.

[0003] Tra...

Claims

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