Voltage transformer metering abnormality on-line monitoring system and method with wide area analysis function

Abstract

The invention provides a voltage transformer metering abnormity on-line monitoring system and method with a wide area analysis function. The system comprises metering performance abnormity on-line monitoring devices arranged in each transformer substation and a background analysis system, wherein errors between secondary output voltages of voltage transformers in the transformer substations at thesame time are calculated according to data synchronously collected by B codes, and an error normal distribution diagram of the secondary output voltages of the voltage transformers is obtained; and the background analysis system is used for receiving the collected and summarized data of each front server, dividing the transformer substations according to regions in combination with pre-input static fixed information of the transformer substations, and centralizing the data collected by the metering performance abnormity on-line monitoring devices in the transformer substations in the same region to perform error normal distribution analysis of secondary output voltage. According to the invention, on-line monitoring of the metering performance of the voltage transformer in operation can berealized, and metering abnormal points can be found in time.

Description

technical field [0001] The invention belongs to the technical field of power grid operation and maintenance, and in particular relates to an online monitoring system for measurement abnormalities of voltage transformers with a wide-area analysis function. Background technique [0002] In the 1980s, the United States began to carry out on-site offline error detection for 500kV capacitor voltage transformer (CVT). In the 1990s, Wuhan High Voltage Research Institute carried out technical innovation on this basis, improved the original 1000pF standard to 500pF, and carried out the off-line detection of field errors of 500kV CVT. This technological innovation greatly reduced the volume of the field standard. It is convenient for equipment transportation and on-site installation, and brings great convenience to the off-line detection of CVT on-site errors. Through a large number of field tests, it is found that the error of the electromagnetic voltage transformer (VT) is relative...

AI Technical Summary

Problems solved by technology

However, the online monitoring technologies and products of voltage transformer errors emerging at this stage have uncertainties in the division of abnormal points, that is, the inaccurate judgment of measurement abnormalities of voltage transformers in operation will directly affect subsequent operations.

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