A method for energy management of a fault indicator

Abstract

The invention discloses a fault indicator energy management method, comprising the following steps: respectively installing three fault indicators on three-phase lines; obtaining the relative time drift and initial Time offset; optimize the transmission power as the fault indicator of the wireless data sender; select the fault indicator of the cluster head, and the fault indicator of the cluster head receives the sampling information of the fault indicator of the non-cluster head, and synchronizes the time scale of the sampling point by using After synchronization, the sampling information of the non-column head fault indicator, the sampling information of the columbine fault indicator and the fault judgment algorithm are used to judge whether a fault occurs. The invention improves the accuracy rate of fault judgment of the fault indicator, greatly reduces the communication power consumption of the fault indicator, solves the problem of low false alarm and false alarm rate in the existing fault indicator, and greatly improves the automation level of the feeder.

Description

technical field [0001] The invention belongs to the technical field of fault location of electric power distribution network, and in particular relates to an energy management method of a fault indicator. Background technique [0002] In the distribution network system, there are many branches and complex operation conditions. When a short circuit or ground fault occurs, it is difficult to determine the fault section, which brings great difficulties to the maintenance work, especially in remote areas, and it takes time and effort to find it. With the advancement of distribution automation and rural power grid transformation in my country, fault indicators, as one of the technical means of distribution fault location, have been put into use in large quantities. Since the fault indicator is installed on the overhead line or in the cable trench, it is inconvenient to replace and maintain. Generally, energy harvesting CT and battery are used for power supply. The service life i...

AI Technical Summary

Problems solved by technology

The technical solution of the present invention uses the strength of the received signal to self-adaptively adjust the transmission power Pt of the fault indicator, and utilizes the power supply voltage of the fault indicator to self-adaptively select the cluster head to communicate with the communication terminal, thus solving the limitations and shortcomings of the existing solutions and realizing Efficient management of fault indicator energy and simultaneous sampling of fault indicators

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