Discussion of Radio Interference Voltage Measurement for High Voltage Equipment Under Application of Direct Current Voltage

The generation mechanism of corona under the application of DC voltage is different from that of AC voltage. As the fast development of HVDC transmission, the measurement of radio interference voltage (RIV) is requested for high voltage equipment under application of direct current voltage. IEC CISPR 18-2 is only applied to RIV measurement for AC equipment. Researches show that the phenomena of corona pulse generated under DC voltage is totally different from that of under AC voltage. If the test circuit recommended in CISPR 18-2 is used for DC voltage, the RIV would be close to zero under 1.1Ur even the audible noise could be heard by ear. New test method is needed for RIV measurement of HVDC equipment. In this paper two measurement methods are recommended for RIV measurement of HVDC…