基于ADPSS的配电网弧光接地故障仿真建模

Simulation Modeling of Arc Grounding Fault in Distribtion Network Based on ADPSS

间歇性弧光接地会使故障相与非故障相之间产生多次能量重新分配过程,诱发非故障相过电压,对中低压配电网绝缘造成很大危害,加强对电力系统过电压水平在线监测与分析并采取适当主动性保护措施十分必要。本文研究了中性点不接地系统中低压配电网单相弧光接地故障发生的机制及因此产生的严重后果,搭建了经典单相接地电弧模型并对其进行仿真验证。在此基础上,选用较合适的单相弧光接地模型,首次利用大型电力系统仿真装置ADPSS对弧光接地故障产生过程进行进一步的仿真验证。仿真结果表明,本文基于ADPSS仿真平台建立的中性点不接地系统弧光接地故障模型是正确的,具有较高的工程化应用价值。

Intermittent arc grounding can produce re-distribution process of multiple energy between the faulty pahse and healthy phase,which induces overvohage on the healthy phase and causes great harm to the insulation of medium and low voltage distribution grid. Therefore, it is necessary to strengthen on- line monitoring and analysis of power system and to adopt appropriate and positive measures. In this pa- per, the generation mechanism and its serious consequences of single-phase arc grounding fault in med- ium and low voltage distribution grid of neutral ungrounding system is studied. The typical single-phase ground arcmodel is set up and its simulation is verified. On that basis,the suitable single-phase arc grou- nding model is selected and further simulation and verification on the generation process of arc grounding fault is made firstly by the use of the simulation device ADPSS of large power system. It is sho-wn by the simulation result that the arc grounding fault model of neutral point unearthed system which is set up based on the ADPSS simulation platform in this paper and alas higher engineering application value.