596 / 2022-03-30 16:59:43

Simulation analysis of non-uniform characteristics of dry bushing temperature distribution under the influence of harmonic current

Harmonic current,dry casing,Temperature Distribution,hot spot temperature

 With the increasingly serious "double high" characteristics of the power grid, the harmonic components in the voltage and current of the dry bushing are increasing, and the non-uniform temperature distribution characteristics of the dry bushing under the influence of harmonic current and harmonic current need to be further studied. , to ensure the safe operation of dry casing. In this paper, based on the actual size of the dry bushing, a three-dimensional temperature distribution simulation model of the dry bushing is established. Through the harmonic current content under the operating conditions of the power grid, the non-uniform temperature distribution characteristics of the dry bushing under the action of the harmonic current are simulated and analyzed, and the harmonic current is obtained. Influence of current content and frequency on non-uniform characteristics of dry bushing temperature distribution. The results show that the presence of harmonic current will lead to an increase in the overall temperature of the dry bushing. The greater the harmonic current content and the greater the harmonic current frequency, the more obvious the temperature rise of the dry bushing.