The Research on Capacity Rise Phenomenon of the Cable Line Under AC Voltage Withstand Test

Capacity rise phenomenon is comparatively prevalent, which induces abroad attention. But under the tests with alternating voltage, especially to the long cable line tests, there has not enough recognition. The capacity rise phenomenon is dismissal, under the tests with alternating voltage to the short line. But to the long line, the condition is serious. Capacity rise reaches the times of impressed voltage in the extreme situation, which is unacceptable. The paper analyzes the equivalent circuit of distribution parameters, to draw the analog simulation conclusion of the correlative parts voltage response, in connection with 'long' and 'short' cable under different frequencies and sheath grounding modes. There are some suggestions at last.