Method for extracting transient recovery voltage waveform envelope characteristic parameters

A technology of transient recovery voltage and extraction method, which is applied in the direction of circuit breaker testing, etc., can solve problems such as the starting point of tangential rotation that is not elaborated, and achieve the effects of ensuring success rate, originality, and narrowing the scope

Active Publication Date: 2019-05-03
STATE GRID ELECTRIC POWER RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method requires multiple calculations of trigonometric functions. When calculating the four-parameter envelope, the available information does not elaborate on the starting point of rotation for all tangents.

Method used

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  • Method for extracting transient recovery voltage waveform envelope characteristic parameters
  • Method for extracting transient recovery voltage waveform envelope characteristic parameters
  • Method for extracting transient recovery voltage waveform envelope characteristic parameters

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Embodiment 1

[0055] The extraction method of a kind of transient recovery voltage waveform envelope feature parameter that the present invention proposes, for the TRV waveform of two parameters, this extraction method comprises the following steps: upload test voltage level, test mode and TRV waveform data; upload the data Perform processing to determine the composition of the TRV envelope, perform corresponding feature extraction on the TRV waveform according to the composition of the TRV envelope, and obtain the characteristic parameters of the envelope; display the envelope and the characteristic parameter line of the envelope.

[0056] The specific process of data processing in this extraction method is as follows:

[0057] S1: Read the standard table of expected TRV characteristic parameters, read the test voltage level, test method and TRV waveform data; according to the preset standard table of expected TRV characteristic parameters, extract the standard TRV envelope characteristic v...

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Abstract

The invention provides a method for extracting transient recovery voltage (TRV) waveform envelope characteristic parameters. According to the test voltage and a test mode, TRV waveform characteristicsare determined, and the envelope characteristic parameters are automatically extracted. The method is advantaged in that computational complexity is low, calculation accuracy is relatively high, dataoriginality is guaranteed, and a local Longge phenomenon due to use of polynomial fitting is avoided.

Description

technical field [0001] The invention relates to the technical field of high-voltage testing, in particular to a method for extracting characteristic parameters of a transient recovery voltage waveform envelope. Background technique [0002] The high voltage circuit breaker is a key device in the power system. Its main function is to break the short-circuit current and isolate the fault area. The process of breaking the short-circuit current of a high-voltage circuit breaker can be divided into three stages: the fault current stage, the arcing stage, and the recovery voltage stage. In the recovery voltage stage, the circuit breaker is subjected to transient recovery voltage (TRV) and power frequency recovery voltage (RV), among which the rising rate and peak value of TRV are the key factors affecting the breaking short-circuit current of the circuit breaker. GB1984-2014 judges whether TRV meets the requirements of the standard by specifying the characteristic parameters of T...

Claims

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Application Information

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IPC IPC(8): G01R31/327
Inventor 张玲洪深周文杰汪海波郑占锋瞿哲奕
Owner STATE GRID ELECTRIC POWER RES INST
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