Charge-induced surface discharge poses a critical risk to the operational reliability of high-voltage direct current gas-insulated equipment and pulsed power system. In this study, we investigate the effects of charge-induced electric field distortion and charge involvement during surface discharge by separately depositing charge spots on two dielectric layers. The results show that deposited positive charges inhibit positive streamer development, whereas negative charges facilitate it, primarily due to electric field distortion induced by deposited charges. Nevertheless, the involvement of deposited charges in streamer development predominantly exhibits a neutralizing effect, exerting an opposite influence on the streamers. This highlights a competitive relationship between deposited charge involvement and electric field distortion. Additionally, the neutralization of deposited charges with electron avalanches reduces the impact of charge-induced electric field distortion, thereby mitigating its effects on discharge.

中文翻译：

---

表面放电中电荷诱导电场失真和电荷中和的竞争机制


电荷诱导表面放电对高压直流气体绝缘设备和脉冲电力系统的运行可靠性构成严重风险。在这项研究中，我们通过在两个介电层上分别沉积电荷点来研究表面放电过程中电荷诱导电场失真和电荷参与的影响。结果表明，沉积的正电荷抑制了正流光的形成，而负电荷则促进了正流光的发展，这主要是由于沉积电荷引起的电场失真。然而，沉积电荷参与 streamer 开发主要表现出中和作用，对 streamers 产生相反的影响。这突出了沉积电荷参与和电场失真之间的竞争关系。此外，电子雪崩对沉积电荷的中和减少了电荷诱导电场失真的影响，从而减轻了其对放电的影响。