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Node voltage fault positioning method and device of relay protection secondary circuit

A node voltage, secondary circuit technology, applied in the field of electric power, can solve the problems of inability to directly collect electrical quantities and not suitable for real-time monitoring of secondary circuits.

Active Publication Date: 2020-03-17
SHENZHEN POWER SUPPLY BUREAU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the protection information system, monitoring background system, remote control device and other equipment are the equipment for indirect collection of electrical quantities, which cannot directly collect electrical quantities, so they are not suitable for the real-time requirements of secondary circuit monitoring

Method used

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  • Node voltage fault positioning method and device of relay protection secondary circuit
  • Node voltage fault positioning method and device of relay protection secondary circuit
  • Node voltage fault positioning method and device of relay protection secondary circuit

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Embodiment Construction

[0053] In order to make the above-mentioned purpose, features and advantages of the present application more obvious and understandable, the specific implementation manners of the present application will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, the present application can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific implementation disclosed below.

[0054]It should be noted that when an element is referred to as being “disposed on” another element, it may be directly on the other element or there may also be an intervening element. When an element is referred to as being "connected to" ...

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Abstract

The application relates to a node voltage fault positioning method and device of a relay protection secondary circuit. The node voltage fault positioning method comprises the step: constructing a secondary circuit model including a positive electrode power supply node, a negative electrode power supply node, a plurality of kinds of elements arranged between the positive electrode power supply nodeand the negative electrode power supply node and nodes arranged at the two ends of the plurality of kinds of elements; acquiring the voltage of each node in the secondary circuit model to form a nodevoltage matrix; and providing a normal-state voltage model including a plurality of normal voltage matrixes and comparing the node voltage matrix with the normal-state voltage model to locate a faultpoint. According to the provided method, the fault diagnosis and fault positioning of the secondary circuit are realized by collecting the electrical quantity of the secondary circuit, thereby realizing real-time fault monitoring of the secondary circuit and improving the operation and maintenance management level of the intelligent substation.

Description

technical field [0001] The present application relates to the field of electric power technology, in particular to a method and device for locating voltage faults of secondary circuit nodes of relay protection. Background technique [0002] Relay protection is a technology used to protect electrical equipment from fault interference and damage as much as possible. The secondary circuit is the carrier to realize the relay protection technology and transmit the amount of protection information. At present, according to the classification of relay protection information transmission methods, the application of relay protection technology is mainly divided into two types, one is centralized microcomputer protection based on electrical quantity, and the other is microcomputer protection based on light quantity. The full-node voltage data acquisition technology designed in this paper is applied to the microcomputer protection based on electrical quantity, but not to the latter. ...

Claims

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Application Information

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IPC IPC(8): G01R31/50
Inventor 赖天德王世祥谷斌梁曦匀黄潇恺李元开
Owner SHENZHEN POWER SUPPLY BUREAU
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