Abstract
The operating temperature of a power capacitor has an effect on its service life directly. A 500-kvar power capacitor is taken as the research object. The capacitor fever produced by internal dielectric loss is considered under the running condition of 55 °C. The 3-D finite volume method calculation model of capacitor temperature is established, and the temperature distribution characteristics and the internal temperature at the hottest spot of the capacitor are obtained. With the research on a corresponding prototype, the numerical simulation results are consistent with the test values. The accuracy of temperature calculation model is testified, which provides a reliable basis for the design and operation of power capacitor.
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