中国电机工程学报Issue(4)：678-684,7.DOI:10.13334/j.0258-8013.pcsee.2014.04.021
基于柔性接地技术的配电网三相不平衡过电压抑制方法
Suppressing Method of Three-phase Unbalanced Overvoltage Based on Distribution Networks Flexible Grounding Control
摘要
Abstract
Unbalanced three-phase parameters to ground can result in the three-phase unbalanced voltage in distribution networks. Generally switched capacitors and reactors are applied in the compensation of three-phase unbalanced parameters to limit the unbalanced voltage. Whereas, the compensation method has limited precision and speed, it is difficult to satisfy the requirement of the three-phase unbalanced voltage suppressing thoroughly and rapidly. In order to improve it, a new method based on the invention patent of flexible grounding technique (Patent number 201110006701.2) was presented in this paper. The three-phase unbalanced current to ground was compensated by the injecting zero sequence current to distribution network through pulse width modulation (PWM) inverter. The zero sequence voltage was controlled and the three-phase unbalanced overvoltage was thus suppressed. Simulation results showed that the proposed method limited the unbalanced overvoltage effectively, and the neutral displacement voltage could be limited to zero.关键词
配电网/位移电压/三相不平衡/有源逆变/注入电流Key words
distribution networks/neutral displacement voltage/three-phase unbalanced/active inverter/injecting current分类
信息技术与安全科学引用本文复制引用
曾祥君,胡京莹,王媛媛,熊婷婷..基于柔性接地技术的配电网三相不平衡过电压抑制方法[J].中国电机工程学报,2014,(4):678-684,7.基金项目
国家自然科学基金项目(61233008，51277014，51207014)；湖南省科技重大专项资助(2012FJ1003)。@@@@Project Supported by National Natural Science Foundation of China (61233008,51277014,51207014) （61233008，51277014，51207014）
Hunan Provincial Science&Technology Key Grant Project Foundation (2012FJ1003) （2012FJ1003）
