Partial Discharge Inception Voltage in DC insulation systems: a comparison with AC voltage supply

作者：Paolo Seri, Leonardo Cirioni, Hadi Naderiallaf, Gian Carlo Montanari, Robert Hebner, Angelo L. Gattozzi, Xianyong Feng · 年份：2019 · DOI：10.1109/eic43217.2019.9046630 · 被引用次数：33 · 研究领域：High voltage insulation and dielectric phenomena、Lightning and Electromagnetic Phenomena、Dielectric materials and actuators

In this paper the AC and DC partial discharge inception voltages, PDIV, are modeled and validated through measurements performed on multi-layer flat specimens with artificial defects. The results highlight that, depending on temperature and material conductivity, there can be a large difference between PDIV under DC and AC, which depends on insulation temperature, thus, e.g., cable loading. Indeed PDIV-DC can be much larger than PDIV-AC at room temperature, but the two values can be very close (with PDIV -DC being even smaller than PDIV-AC) at maximum operating temperature, i.e. full load.