基于灵活选线的谐振接地方式适应性分析及应用研究

Adaptability Analysis and Application Research of Resonant Grounding Mode Based on Flexible Line Selection

近年来由于城市电网发展,辽宁电网开展全面改造,导致电网对地电容电流增大,单相接地电弧不易自动熄灭,故障发生时易产生较大的过电压,导致其它相绝缘击穿从而扩大为相间故障。在这种形势下,对接地方式提出了新的要求和挑战。通过对多种接地方式进行对比研究,在分析传统接地方式的基础上,进行仿真模拟,提出更适合辽宁电网的接地方案,并通过试验验证仿真的正确性,确保其满足辽宁电网发展及提高配电网供电可靠性的需要。

Due to the development of city power grid,Liaoning power grid carries out a comprehensive renovation.Instead of overhead lines,cable outlets continue to increase.It leads to the power grid to ground capacitance current increasing,single?phase grounding arc is not easily automatically extinguished.Fault prone to overvoltage is larger and it can cause other insulation breakdown and expand fault.Under this situation,new requirements and challenges are put forward in the way of docking.This paper is based on the analysis of the traditional grounding mode.Through the simulation to make the study,it is more suitable for the Liaoning power grid grounding scheme.