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Inter-station time difference analysis method based on fault wave recording data

A fault recording and analysis method technology, applied in the field of automation, can solve problems such as insufficient timing accuracy, complex timing system, and poor scalability, and achieve high accuracy, strong robustness, and simple and easy-to-operate implementation methods

Active Publication Date: 2017-07-14
BEIJING SIFANG JIBAO AUTOMATION
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Problems solved by technology

[0008] Aiming at the problems of poor expansibility, insufficient time synchronization accuracy and complicated time synchronization system in the current time synchronization method, the present invention proposes a time difference analysis method between stations based on fault recording data, using the historical recording data in the fault information system Accurate analysis of time difference of data

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  • Inter-station time difference analysis method based on fault wave recording data
  • Inter-station time difference analysis method based on fault wave recording data
  • Inter-station time difference analysis method based on fault wave recording data

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Embodiment Construction

[0035] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and examples.

[0036] The present invention proposes a time difference analysis method between stations based on the fault recording data, and calculates the time difference between the stations based on the historical fault recording data between the stations. The feasibility of the method is based on the following analysis:

[0037] In the power network, the average distance between power stations is on the order of hundreds of kilometers, and the propagation speed of electrical signals in the transmission line is between 290 km / s. Therefore, when a transmission line fault occurs, in the real time coordinate system , the time difference between the wave recorders at both ends of the line receiving the fault waveform is below microseconds. Therefore, the time difference between stations can be determined as long as the fault recordings at both...

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Abstract

Provided is an inter-station time difference analysis method based on fault wave recording data. The method comprises steps of determining a relative time point of a fault in wave recording by use of a frequency domain analysis method; adopting a dynamic time warping method to search a fault wave recording pair matched with a fault feature; and generating an inter-station time offset table. According to the invention, precise synchronization can be performed on time between factory stations based on historical wave recording data of a current fault information system without depending on a circuit parameter and an electric power system framework, and the method is simple to realize and operate, quite high in accuracy and high in robustness.

Description

technical field [0001] The invention belongs to the field of automation, in particular to an analysis scheme of time difference between stations applied in a fault information system. Background technique [0002] Although many factories and stations are equipped with a unified time service system, the reliability is poor. At the same time, serious faults often cause interruption of the communication link, resulting in frequent errors in the clock. The oscilloscopes of multiple factories and stations can achieve accurate time synchronization. There is no guarantee at this time. When performing fault analysis, for simple faults, the staff can manually correlate according to the change of characteristic electrical quantities and the action of the protective circuit breaker by analyzing the fault waveforms of multiple plants in the main station. However, for some complex faults that occur in a short period of time, each plant station may record multiple wave recording data in ...

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Application Information

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IPC IPC(8): G01R31/00G01R31/08H02J13/00
CPCG01R31/00G01R31/086G01R31/088H02J13/0017
Inventor 张利强李恒李焕明郭庆武徐延明黄磊刘刚焦邵华白淑华王喆昊张天侠
Owner BEIJING SIFANG JIBAO AUTOMATION
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