Estimation of HVDC Partial Discharge Incident Occurrences

Abstract: Similar to AC system, the insulation system of DC system also gets affected. The HVDC station is a challenging environment for measurement of partial discharge level due to very high interference levels caused from the switching of thyristor-controlled converters. There is also significant interference from external air-corona due to high electric stress at the surface of conductors and hardware that exceeds the corona inception level. In this review, lets us look at the scenario of HVDC system getting affected by partial discharge with methods of measuring it.

Keywords: Discharges, corona interference, noise, Inception Voltage, Interferences, HVDC, Converter Transformers, UHF signals, HFCT.