Oscillation identification system and method of power system

A power system and identification method technology, applied in the direction of measuring electricity, measuring electrical variables, measuring resistance/reactance/impedance, etc., can solve problems such as large error influence and difficult compensation value setting

Active Publication Date: 2016-12-21
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
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Problems solved by technology

Oscillation identification algorithm based on the principle of compensation, its error is greatly affect...

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  • Oscillation identification system and method of power system
  • Oscillation identification system and method of power system
  • Oscillation identification system and method of power system

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[0030] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below in conjunction with the drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the invention. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention. Embodiments of the present invention will be described in detail below ...

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Abstract

The invention discloses an oscillation identification system and method of a power system. The oscillation identification system comprises an information collecting and processing module, a sine impedance calculating module and an oscillation identification module which are connected sequentially; the information collecting and processing module collects and calculates power frequency voltage and current, determines whether protection is carried out at the two sides of a line, and starts the sine impedance calculating module if YES; the sine impedance calculating module calculates the integrated sine impedance of the line; and the oscillation identification module determines whether oscillation occurs in the power system, sends a locking signal to a protector if oscillation occurs in the power system, and otherwise, sends a tripping signal to the protector.

Description

technical field [0001] The invention relates to the technical field of electric power system relay protection, in particular to a power system oscillation identification system and a method thereof. Background technique [0002] The large-scale regional interconnection of the power grid causes power system oscillations to occur from time to time, which may cause misoperation of distance protection and even threaten the safe and stable operation of the power system. Therefore, it has important practical significance and engineering practical value to study the oscillation identification scheme. [0003] The difficulties in constructing an oscillation identification scheme are mainly concentrated in two aspects: one is to block the protection in the case of simple oscillation of the system to prevent its malfunction; the other is to quickly open the protection when a fault occurs during the oscillation blocking period. At present, the widely used oscillation identification me...

Claims

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Application Information

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IPC IPC(8): G01R31/08G01R31/00G01R27/02
CPCG01R27/02G01R31/00G01R31/086G01R31/088
Inventor 马静张润峰项晓强
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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