Third generation (3G) communication network-based transmission line fault area positioning system

Abstract

The invention relates to a third generation (3G) communication network-based transmission line fault area positioning system. The system consists of three subsystems, namely a signal acquisition system, a data transmission-remote terminal control system and a monitoring centre control system. A manager uses a common microcomputer as an operating terminal which does not need to install any special program, and can access a monitoring centre system anytime and anywhere, know a fault state in time, determine a fault position rapidly, perform data inquiry, and participate in fault removal processing. For the manager using a mobile phone, the mobile phone can serve as a terminal for receiving fault information in real time. Therefore, transmission line fault monitoring forms a complete network system. Moreover, the labor intensity of workers is greatly reduced; the labor efficiency is improved; and the fault positioning accuracy is improved greatly.

Description

technical field [0001] The invention relates to a transmission line fault location system, in particular to a transmission line fault area location system based on a 3G communication network. Background technique [0002] In my country's power system, the voltage level mainly belongs to the medium and low voltage power distribution network ranging from 6kV to 110kV, and the neutral point grounding method is mainly ungrounded or grounded through the arc suppression coil. Such a system is called a small current grounding system. [0003] When a single-phase grounding occurs on the transmission line of a small current grounding system, for a system with an ungrounded neutral point, the zero-sequence CT output current (the sum of the two-phase currents) at the beginning of the fault line is the ground capacitance current of the system other than the fault line, and the value is very small ; And for the system whose neutral point is grounded through the arc suppressing coil, due ...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems existing in the above-mentioned prior art, the present invention provides a transmission line fault area positioning system based on a 3G communication network through a large number of exploration studies and test summaries, and proposes a 256-point simplified wavelet algorithm, which solves the problems of the prior art. The problem that the embedded system cannot use the wavelet transform algorithm, and the invention improves the accuracy of fault judgment and realizes the long-distance wireless transmission of fault information

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