Thermal circuit model-based method for obtaining coiling hot point temperature of transformer

Abstract

The invention provides a thermal circuit model-based method for obtaining a coiling hot point temperature of a transformer, which is applied to obtaining of the coiling hot point temperature of the transformer. The method comprises the steps of building an environment temperature-based thermal circuit model according to solar radiation heat and obtaining the coiling hot point temperature of the transformer through the thermal circuit model, wherein the thermal circuit model comprises an average oil temperature model, a top oil temperature model and a coiling hot point temperature model; calculating an average oil temperature according to a differential equation corresponding to the average oil temperature; substituting the calculated average oil temperature into a differential equation corresponding to the top oil temperature model to calculate a top oil temperature; and substituting the calculated top oil temperature into a differential equation corresponding to the coiling hot point temperature model to calculate a coiling hot point temperature. The thermal circuit model-based method for obtaining the coiling hot point temperature of the transformer has the beneficial effects that the coiling hot point temperature is calculated through the thermal circuit model, so that the obtained hot point temperature value is more accurate and the problem in the prior art that the influences of the solar radiation heat and the environment temperature on the coiling hot point temperature are not considered is solved.

Description

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AI Technical Summary

Benefits of technology

This technology helps calculate accurately how well an insulated wire used for electricity flows during operation without being affected by external factors such as lightning strikes or changes made at different locations around it's location.

Problems solved by technology

This technical problem addressed during this patented process relates to monitoring the heat generated at windings within power transformers due to sunlight exposure overall. Current methods for calculating the current level are prone to errors caused by factors like ambient light or changes in air pressure.

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