Fault monitoring device based on distributed wave recording

Abstract

The present invention provides a fault monitoring device based on distributed wave recording, comprising current sensors and voltage sensors, wherein the current sensors are arranged on branch lines of three phases of a power transmission line of a distribution network, the voltage sensors are arranged on a medium-voltage line, the current sensors establish connections with the voltage sensor within an effective communication distance through wireless data transmission, and finally the voltage sensor performs data transmission with a background through a wireless service provider's network. The fault monitoring device of the present invention has the advantages that: current of the branch lines of the distribution network is monitored on line in real time, and wave recording is performed; the mode of performing fault diagnosis through distributed wave recording of the branch lines of the distribution network is adopted for monitoring and recording the current of the line in real time, tracing is performed when a fault occurs, so as to search the fault causes; the voltage sensors are integrated for performing fault diagnosis, at the same time, wave recording is performed for a voltage signal, thereby aiding decision making.

Description

technical field [0001] The invention relates to a fault monitoring device of an electric power system, in particular to a fault monitoring device based on distributed wave recording. Background technique [0002] The reliability problem of power system penetrates into all aspects of power system planning, design, operation and management. The power supply of the distribution network is increasing year by year, and the increase of the load of the power grid also puts forward extremely high requirements on the reliability and stability of the power supply. Therefore, strengthening the safe operation management and rapid fault diagnosis of distribution line equipment has become the current important task. [0003] In the ring network power distribution system, especially in the system that uses a large number of ring network load switches, if a short-circuit fault or a ground fault occurs in the lower-level power distribution network system, the upper-level power supply system...

AI Technical Summary

Problems solved by technology

[0005] 1) The single-phase ground fault of the small current grounding system cannot be identified, because the fault indicator is a single device and cannot be comprehensively judged

[0006] 2) Misoperation, because the circuit breaker trips, the indicator feels that the current and voltage drop to zero, and the misoperation is similar to the fault current characteristic

[0007] 3) Since it is a single device, the maintenance personnel cannot judge the status of the outgoing line when a fault occurs, there is no retrospective, and the degree of informatization is low

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