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A Method for Extracting Characteristic Parameters of Transient Recovery Voltage Waveform Envelope

A technology of transient recovery voltage and extraction method, applied in circuit breaker testing and other directions, can solve the problem of not specifying the starting point of tangent rotation in detail, and achieve the effect of increasing calculation accuracy, reducing calculation amount, and ensuring originality

Active Publication Date: 2021-06-18
STATE GRID ELECTRIC POWER RES INST +1
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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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  • A Method for Extracting Characteristic Parameters of Transient Recovery Voltage Waveform Envelope
  • A Method for Extracting Characteristic Parameters of Transient Recovery Voltage Waveform Envelope
  • A Method for Extracting Characteristic Parameters of Transient Recovery Voltage Waveform Envelope

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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 method for extracting the characteristic parameters of the envelope of the transient recovery voltage waveform proposed by the invention can judge the characteristics of the TRV waveform according to the test voltage and the test mode, and automatically extract the characteristic parameters of the envelope. This extraction method has a small amount of calculation and is more accurate in calculation, which ensures the originality of the data, and does not cause the "Rongge" phenomenon to occur locally due to the use of polynomial fitting.

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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Patent Type & Authority Patents(China)
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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