湖南大学学报（自然科学版）2016，Vol.43Issue(8)：85-91,7.
基于坐标变换的微网功率解耦及限幅控制策略
A Coordinate Transformation Based Power Decoupling and Restriction Control Strategy for Microgrid
摘要
Abstract
In low voltage microgrid,traditional power droop control will cause active and reactive power coupling problem.Virtual power droop control based on coordinate transformation was adopted and its decoupling characteris-tics,power sharing and restriction problems were studied.Relative gain analysis method was used to analyze the pow-er coupling degree after adopting coordinate transformation.It is theoretically proved that the virtual power droop con-trol can realize total power decoupling characteristics when the coordinate transformation matrix and line impedance have the same resistance and inductance ratio.Aiming at the problem that line impedance difference can cause uneven power sharing,a strategy was proposed,which aimed to improve power sharing accuracy by adding virtual negative impedance.In the light of the limitation of the existing power restriction range of virtual power droop control which is not equal to the actual power restriction range of the inverter,a new power restriction control strategy was proposed. Eight sections were divided for the operation points,in which the power exceeds the limits.The section number was determined according to the inverter output power and the corresponding adj ustment measures were taken.Simulation results have verified the correctness and effectiveness of the proposed control strategy.关键词
微电网/功率控制/坐标变换/虚拟功率/解耦/虚拟阻抗/功率限幅Key words
microgrid/power control/coordinate transformation/virtual power/decoupling/virtual im-pedance/power restriction分类
信息技术与安全科学引用本文复制引用
颜湘武,王月茹,王星海..基于坐标变换的微网功率解耦及限幅控制策略[J].湖南大学学报（自然科学版）,2016,43(8):85-91,7.基金项目
国家高技术研究发展计划（863计划）资助项目（2015AA050603）；河北省自然科学基金资助项目（E2015502046）；国家电网公司科学技术资助项目（SGTYHT／14-JS-188）；河北省科技计划资助项目 （）
