Identification method of fault indicator installation phase sequence

Abstract

The invention discloses an identification method of a fault indicator installation phase sequence, which includes the steps of: monitoring a second pulse signal rising edge of a GPS clock signal; sending synchronization commands to indicators by a communication unit when the second pulse signal rising edge appears, and controlling each indicator to carry out voltage waveform sampling on respectively-installed phase sequence; and copying and reading sampling data of each indicator, and judging the phase sequence installed on each indicator according to a phase relationship of a three-phase voltage of an electric power system. The identification method of the fault indicator installation phase sequence uses the GPS clock signal to provide the uniform synchronization signal, uses the synchronization signal to control each indicator for the voltage waveform sampling, and judges the phase sequences where the indicators are according to the sampling waveforms. Therefore the method is automatically realized through the fault indicators all the way without human intervention. The efficiency is extremely high. The mistakes and errors possibly brought by manual operation are avoided. The information of the phase sequences where the indicators are is re-checked and corrected regularly and irregularly. The information correctness of the phase sequences where the indicators are is guaranteed.

Description

technical field [0001] The invention specifically relates to a method for identifying the installation phase sequence of a fault indicator. Background technique [0002] With the development of national economy and technology and the improvement of people's living standards, electric energy has become one of the indispensable energy sources in people's production and life. [0003] Power equipment status online monitoring technology has been widely used in power systems because of its advantages of automatic monitoring of power system operation status, automatic detection of power equipment failures and active reporting of alarm information. On-line monitoring fault indicator is one of the important equipment of power system automation technology. It generally consists of 1 communication unit and 3 communication fault indicators. The indicator communicates with the communication unit through micro-power wireless, and the 3 indicators It is also possible to communicate with ...

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Problems solved by technology

The above-mentioned methods all have obvious disadvantages: because there are many installation points of the fault indicator, the installation site wiring is also relatively complicated, and the phase sequence is unclear. Man

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