基于改进型P/Q控制的多源微电网功率脉动抑制  

Power pulsation suppression of multi-source microgrid based on improved P/Q control

作　　者：董鹤楠 苑舜[2,4] 李闯[2] 韩子娇 丁惜瀛 DONG He-nan;YUAN Shun;LI Chuang;HAN Zi-jiao;DING Xi-ying(Grid Technology Center,Electric Power Research Institute of State Grid Liaoning Electric Power Co.Ltd.,Shenyang 110006,China;School of Electrical Engineering,Shenyang University of Technology,Shenyang 110870,China;Dispatching Control Center,State Grid Liaoning Electric Power Co.Ltd.,Shenyang 110004,China;Northeast China Energy Regulatory Bureau,National Energy Administration,Shenyang 110006,China)

机构地区：[1]国网辽宁省电力有限公司电力科学研究院电网技术中心,沈阳110006 [2]沈阳工业大学电气工程学院,沈阳110870 [3]国网辽宁省电力有限公司调度控制中心,沈阳110004 [4]国家能源局东北监管局,沈阳110006

出　　处：《沈阳工业大学学报》2020年第1期7-11,共5页Journal of Shenyang University of Technology

基　　金：国家自然科学基金项目(U1766204);国网辽宁省电力有限公司科技攻关项目(2019YF-01)

摘　　要：针对微电网三相不对称负载引起的功率脉动严重影响供电质量的问题,提出基于正负序信号解耦的改进型P/Q控制策略.利用叠加原理将并网点采集的实时信号分解,提取出各自独立、三相平衡的正负序分量,设计陷波器实现正负序分量的解耦控制,通过抑制负序电流分量降低功率脉动.仿真结果证明:提出的控制策略能够准确地对脉动电流正负序分量进行解耦控制,在保证正序分量有效输出的同时,将负序分量降到最低,改进后功率脉动降低了50%.In order to solve the problem that power pulsation caused by three-phase imbalanced load seriously damages the quality of power supply in a microgrid,an improved P/Q control strategy based on decoupling of positive and negative sequence signals was proposed.The real-time signals collected from grid-connected points were decomposed through superposition principle,and positive and negative sequence components both independent with three-phase balance were extracted.A notch filter was designed to realize the decoupling control of positive and negative sequence components.The power pulsation was reduced by suppressing the negative sequence current.Simulation results show that the positive and negative components of pulsation current can be accurately decoupled and controlled with the as-proposed control strategy.The positive component can be effectively output,and the negative component can be minimized at the same time.As a result,the power pulsation reduces by 50%.

关 键 词：并网逆变器 三相不平衡 功率脉动 负序电流 电能质量 P/Q控制 不对称电流分解 解耦控制 

分 类 号：TM76[电气工程—电力系统及自动化]