The reliable extinguishment of a single phase-to-ground arc is the key issue for safe and reliable operation in the distribution network. However, since the existing arc suppression methods are normally affected by the line parameters, the residual current (RC) at the grounding point still exists, then the grounding arc is hard to be extinguished reliably. Thus, an adaptive active voltage-type arc suppression (AAVAS) strategy that can reliably inhibit the RC at the grounding point is proposed in this article. First, the mechanism of the traditional voltage-type arc extinguishing method affected by the line parameters is proved, and the variation rules are given for the RC under different fault distances and grounding resistance. Second, the variation characteristics are analyzed for the faulty line current before and after arc extinguishing. On this basis, it is proposed to add the residual voltage compensation ring to the traditional voltage-type control strategy, which can effectively offset the influence of voltage drop on faulty-phase line impedance. Then, the Bode diagram analysis shows that the presented strategy performs well regardless of ground-fault conditions. Finally, the feasibility and effectiveness of the proposed AAVAS strategy are verified by the simulation and experiment results.

中文翻译：

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主动配电网考虑线路参数影响的自适应主动电压型消弧策略


单相接地电弧的可靠灭弧是配电网安全可靠运行的关键问题。然而，由于现有的消弧方法通常受线路参数的影响，接地点处的剩余电流（RC）仍然存在，接地电弧难以可靠熄灭。因此，本文提出了一种能够可靠地抑制接地点RC的自适应主动电压型消弧（AAVAS）策略。首先，论证了传统电压型灭弧方法受线路参数影响的机理，给出了不同故障距离和接地电阻下RC的变化规律。其次，分析了故障线路电流灭弧前后的变化特征。在此基础上，提出在传统电压型控制策略中加入剩余电压补偿环，可以有效抵消电压降对故障相线路阻抗的影响。然后，伯德图分析表明，无论接地故障条件如何，所提出的策略都表现良好。最后，通过仿真和实验结果验证了所提出的AAVAS策略的可行性和有效性。