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Transient overvoltage monitoring method

A transient overvoltage and overvoltage technology, which is applied in the direction of measurement using digital measurement technology, can solve the problems of lack of monitoring and analysis methods for transient overvoltage, and achieve the effect of improving power supply quality, safety and reliability

Inactive Publication Date: 2013-07-10
STATE GRID CORP OF CHINA +2
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Problems solved by technology

At present, there is a lack of effective monitoring and analysis methods for transient overvoltages, therefore, this has become a problem that the applicant is committed to researching and solving

Method used

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with accompanying drawing.

[0034] see figure 1 , the transient overvoltage monitoring method of the present invention comprises the following steps:

[0035] Step S1, setting sampling parameters, that is: setting a voltage threshold, and the voltage greater than the voltage threshold is an overvoltage;

[0036] Step S2, obtaining a voltage signal from the high-voltage bus through a voltage sensor;

[0037] Step S3, performing signal preprocessing on the acquired voltage signal so that it can be received by the data acquisition part;

[0038] Step S4, receiving the preprocessed voltage signal, and displaying the voltage waveform in real time;

[0039] Step S5, according to the sampling parameters set in step S1, judge whether it is an overvoltage, that is: judge whether it is greater than the voltage threshold set in step S1; if yes, go to step S6; if not, return to step S2;

[0040] Step S6, stor...

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Abstract

The invention discloses a transient overvoltage monitoring method. The method includes the following steps: setting sampling parameters; acquiring voltage signals from a high-voltage bus through a voltage sensor; carrying out signal preprocessing on the acquired voltage signals; displaying a voltage waveform in real time; judging whether a voltage is overvoltage or not; storing overvoltage data; carrying out time-domain analysis on the overvoltage; and carrying out frequency-domain analysis on the overvoltage. Through online monitoring of the overvoltage, various overvoltage types and overvoltage generation reasons and effects on an electric power system are analyzed, an improvement scheme is provided, damage, caused by the overvoltage, low voltage and electric energy quality, to the electric power system and electric devices is effectively reduced, and quality, safety and reliability of power supply of the electric power system are promoted.

Description

technical field [0001] The invention relates to a transient overvoltage monitoring method. Background technique [0002] The transient phenomenon is manifested as the transition from one stable state to another, and it can also be said that the system changes from one energy distribution method to another energy distribution method. Power system overvoltage is a transient phenomenon of abnormal voltage rise exceeding the normal working voltage in the power system under certain conditions. In terms of its fundamental origin, it can be divided into two types, namely external overvoltage and internal overvoltage. Overvoltage. External overvoltage, also known as lightning overvoltage or atmospheric overvoltage, is characterized by short duration, large amplitude, and great harm. Internal overvoltages are caused by energy conversion or transfer within the power system. Since the energy of the internal overvoltage comes from the grid itself, its amplitude is basically proportio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/25
Inventor 沈晓峰周华鲍长庚胡龙生汪军王大成黄冀华卢婧婧黄强朱伟顾华姚林朋贾雅君
Owner STATE GRID CORP OF CHINA
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