Out-of-tolerance risk early warning method for capacitor voltage transformer

Abstract

The invention provides an out-of-tolerance risk early warning method for a capacitor voltage transformer, and the method comprises the steps: firstly, collecting the historical error estimation value data of the transformer and the long and short term error prediction value of the transformer, and carrying out the analysis to obtain the reliability index of the long and short term error prediction value of the transformer; and then, according to the historical error estimation value data of the mutual inductor, obtaining a stability index of the metering error of the mutual inductor. And finally, based on the reliability index of the long and short term error prediction value of the mutual inductor and the stability index of the metering error of the mutual inductor, performing out-of-tolerance risk evaluation on the mutual inductor by using a fuzzy comprehensive evaluation method. Historical error estimation value data of the mutual inductor and long and short term error prediction values of the mutual inductor are collected, a reliability index of the long and short term error prediction values of the mutual inductor and a stability index of metering errors of the mutual inductor are obtained through analysis, and future risk prediction and early warning of the mutual inductor are achieved according to the reliability index and the stability index through a fuzzy comprehensive evaluation method.

Description

technical field [0001] The invention relates to the technical field of on-line monitoring of electric power metering, in particular to an early warning method for an out-of-tolerance risk of a capacitive voltage transformer. Background technique [0002] As an important part of the electric energy metering device, the accuracy and reliability of the metering performance of the transformer is directly related to the fairness and justice of the electric energy trade settlement. A capacitive voltage transformer (Capacitance type Voltage Transformer, CVT) is divided by series capacitors, and then stepped down and isolated by an electromagnetic transformer. As an instrument for transforming voltage, a capacitive voltage transformer can also couple the carrier frequency To the transmission line for long-distance communication, selective line high-frequency protection, remote control and other functions. Compared with conventional electromagnetic voltage transformers, capacitive v...

AI Technical Summary

Problems solved by technology

The existing technology analyzes the risk of the transformer evaluation system, but there is only a single risk index predicted by the BP artificial neural network algorithm, which cannot fully and accurately realize the risk prediction

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