南方电网技术2017，Vol.11Issue(1)：58-64,7.DOI:10.13648/j.cnki.issn1674-0629.2017.01.009
微电网中不同容量逆变器经线路并联的环流特性分析和功率分配控制
Circulating-Current Analysis and Power Distribution Control of Parallel Inverters with Different Power Ratings in Microgrid
摘要
Abstract
To deal with power distribution problems of multiple parallel inverters in microgrid, the interaction mechanism between circulating-current and power distribution is elaborated firstly.Under the situation that the low-voltage microgrid line parameters is equivalent in resistance and reactance, by adding virtual reactance to compensate microgrid transmission line and achieve the resistance and inductance ratio like high-voltage transmission lines, the coupling problem of active power and reactive power is solved.Then the conditions are studied that the control strategy should meet for precise power distribution and circulating-current restraint with inductive impedance line.Improved droop control is put forward aiming at the coupling of reactive power distribution and inductive line impedance, which can realize reactive power distribution and circulating-current restraint.Finally, the correctness of the theoretical analysis and the proposed control strategy is verified by PSCAD/EMTDC simulation.关键词
逆变器下垂控制/功率解耦/功率分配/环流Key words
droop control of inverters/power decoupling/power distribution/circulating-current分类
信息技术与安全科学引用本文复制引用
邓天成,颜湘武,程云帆,华天琪,张伟超,张也..微电网中不同容量逆变器经线路并联的环流特性分析和功率分配控制[J].南方电网技术,2017,11(1):58-64,7.基金项目
国家高技术研究发展计划(863计划)项目(2015AA050603).Supported by the National High Technology Research and Development Program of China (863 Program) (2015AA050603). （863计划）
