Study on Optimization of Withstand Voltage Test for Long-Distance Power Cable Multi-Resonance System

This paper first introduced the recommended standards for withstand voltage test of power cable and compared their difference on the test parameters. Then an optimization method for the connection modes of multi-resonance system withstand voltage test was proposed. To verify the effectiveness of this method, a case study on the withstand voltage test of three long-distance cables was analyzed. The results show that the calculated current and resonant frequency of a single device are consistent with the actual results using the equivalent inductance and capacitance. Therefore, according to relevant standards, with the test frequency and the test current as constraint conditions, the optimization for the connection mode of variable frequency withstand voltage test of long-distance cable can be achieved, under the principle of minimum test equipment.