基于UDVR的低压配电线路雷击电压跌落治理仿真

Simulation on Improving Voltage Drop Caused by Lighting Based on UDVR at Distribution Line

采用分相控制的UDVR主电路结构，利用瞬时波形比较法，基于三角波比较的delta增量逆变技术，建立了UDVR的PSCAD／EMTDC仿真模型，解决了低压配电网线路遭受雷击、绝缘子闪络等引发的单相接地故障在线路重合闸期间引发的电压跌落问题，保证了敏感负荷在此期间的持续供电的电能质量．仿真结果表明：模型建立正确，控制方法可行．

A simulation model of Uninterrupted Dynamic Voltage Restorer（UDVR）is built, adopting the main circuit of three single phase structure and control system of instantaneous waveforms comparative method based on delta increment inverter technology. Voltage drop problem caused by single phase short circuit grounding fault because of lightning or insulator flashover is solved before line recloses. Therefore, power quality of sensitive load is guaranteed. Simulation results show that the model is suitable ; the con- trol method is feasible and provides support for decision-making and technical support for distribution grid improvement and power quality improvement.