Low-voltage reactive compensation control device and fault self-diagnosis method

Abstract

The invention provides a low-voltage reactive compensation control device with a fault diagnosis function. The low-voltage reactive compensation control device comprises a data processing and storing unit consisting of a microprocessor and a storage chip, a sampling signal processing unit, a sampling circuit, a liquid crystal display unit, an output signal and the like. A software part of the low-voltage reactive compensation control device provided by the invention consists of a data storage calculation and fault diagnosis program. The data storage calculation and fault diagnosis program consists of a fault database, a fault diagnosis module and the like; and the design ideal of the fault diagnosis database refers to recording experience that the engineering personnel daily maintains a reactive compensation system as an experience database through numbers. A diagnosis process is a data matching process based on important degree; the collected data is matched according to a rule in a rule base of an expert system in an order form small important degree to large important degree; and a fault diagnosis module has universal detection and good generality of a fault diagnosis rule base according to a user setting value and corresponding fault alarm triggered by a fault, so as to help the field maintenance personnel rapidly to find out the fault.

Description

technical field [0001] The invention relates to a reactive power regulating device for a power grid, in particular to a reactive power compensation device for a low-voltage power grid and a fault self-diagnosis method thereof. Background technique [0002] According to public information data, the line loss of China's power system is as high as 5.9%, and the line loss of the low-voltage distribution network system accounts for more than 40% of the line loss of the power system. China stipulates that the power factor of users above 100KVA should not be lower than 0.90. However, whether it is the distribution network system of the power supply enterprise or the user can meet the requirements, the line loss of the distribution network line is high, and the line loss rate is above 10%. Due to poor management, the individual line loss rate is even as high as 18% to 20%. %. With the modernization of distribution management of various power supply companies and the increasingly s...

AI Technical Summary

Problems solved by technology

[0003] At present, most commonly used reactive power compensation devices for low-voltage power distribution are assembled by connecting reactive power compensation controllers, several low-voltage power capacitors, switches for switching low-voltage capacitors, and some protection components in outdoor equipment boxes. Necessary means of fault self-diagnosis, causing great inconvenience to the daily operation and maintenance of power distribution

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