Method for implementing time synchronization on different time scale fault recording systems

A technology of fault recording and time synchronization, which is applied in the field of electrical signal waveform characteristic analysis and power system fault analysis to achieve the effect of time synchronization

Inactive Publication Date: 2017-09-29
云南电力试验研究院(集团)有限公司
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Problems solved by technology

[0002] PMU, electrical main equipment protection device and special recording equipment, the relevant electrical state quantity information recorded duri...

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  • Method for implementing time synchronization on different time scale fault recording systems

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Embodiment Construction

[0018] The technical solution of the present invention is further described below according to the accompanying drawings of the description.

[0019] figure 1 The realization path diagram of the technical solution of the present invention is shown, wherein, the wave recording data analysis module reads the fault wave recording data in the COMTRADE format, and analyzes the wave recording data according to the relevant definitions of the COMTRADE format; the current / voltage mutation occurs The time identification module is based on the moment when the disturbance occurs, and the electrical quantities such as current and voltage will have different degrees of mutations. Therefore, according to the threshold value of the current and voltage mutations exceeding a certain size, it can identify the occurrence of mutations of different current and voltage signals. Time, from which the disturbance occurrence time is obtained; the current / voltage negative-sequence and zero-sequence comp...

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Abstract

Disclosed is a method for implementing time synchronization on different time scale fault recording systems. According to the technical essential, fault occurrence time reflected by different electrical quantities is recognized on the basis of various jump features of the electrical quantities at the fault time, and recording data recorded by the different time scale fault recording systems is finally aligned on a time axis. One substation or power plant is often equipped with a PMU (Power Management Unit), an electrical main equipment protection device and dedicated recording equipment, which have own internal clocks and receive external timing instructions to correct self clocks. If a timing device is not equipped or the timing device has a great error, the electrical quantity waveform data recorded by the recording equipment is asynchronous on time, then time axis alignment of the recording data of the devices is realized by using a method for recognizing the fault disturbance occurrence time of the recording data, and comparative analysis of the data can be realized.

Description

technical field [0001] The invention relates to power system analysis technology, in particular to the technical fields of power system fault analysis and electrical signal waveform feature analysis. technical background [0002] PMU, electrical main equipment protection device and special recording equipment, the relevant electrical state quantity information recorded during the electrical main equipment electrical fault, is currently only used to analyze the correctness of the protection device action and confirm the fault point. In fact, the above-mentioned fault recording information can be used for further data mining applications, including the evaluation of the anti-saturation capability of current transformers related to the fault circuit, whether the protection current / voltage secondary circuit is correct, whether the sampling and calculation processing of the protection device are correct, and whether the fault related Check the correctness of the protection coordi...

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Application Information

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IPC IPC(8): H04J3/06G01R31/00
CPCH04J3/0638G01R31/00
Inventor 陈晶吴水军段侯峰杨杨万雄彪
Owner 云南电力试验研究院(集团)有限公司
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