中国电机工程学报2017，Vol.37Issue(17)：4901-4910,10.DOI:10.13334/j.0258-8013.pcsee.161694
微网改进下垂控制策略研究
Research on Improved Droop Control Strategy for Microgrid
摘要
Abstract
Droop control strategy is usually used in multi-parallel generators in the island mode of microgrids.But the decoupling control method proposed in the strategy is not suitable for the microgrids whose line reactance is not far greater than resistance.In other words,the strategy has troubles in the control of these microgrids' operation.To solve the problem,the control principle was analyzed and the droop control strategy was improved by virtual reactance method with a voltage compensation unit.In this way,power load was distributed according to DGs' capacity and the voltage would not drop sharply.In addition,to solve the frequency over-limitation resulted by the switching of heavy load or large-capacity DGs,An inverted-S droop control strategy and related requirement of inverted-S shape functions were proposed.The feasibility of inverted-S droop control strategy was verified by simulation.Besides,comparing three kinds of satisfying inverted-S shape functions,the control advantage of the logarithmic inverted-S shape function was demonstrated by math deduction.关键词
微网/下垂控制/虚拟阻抗/电压补偿/“反S”下垂控制Key words
microgrid/droop control/virtual impedance/voltage compensation/inverted-S droop control分类
信息技术与安全科学引用本文复制引用
梁海峰,郑灿,高亚静,李鹏..微网改进下垂控制策略研究[J].中国电机工程学报,2017,37(17):4901-4910,10.基金项目
国家863高技术基金项目(2015AA050104).The National High Technology Research and Development of China 863 Program (2015AA050104). （2015AA050104）
