计及线路阻抗的分布式微源自适应下垂并联  

Adaptive Droop Parallel for Distributed Micro-source Considering Line Impedance

作　　者：郭东旭 赵鹏翔 杨佳霖 李娜 GUO Dong-xu;ZHAO Peng-xiang;YANG Jia-lin;LI Na(State Grid Integrated Energy Service Group Co.,Ltd.,Beijing 100052,China)

机构地区：[1]国网综合能源服务集团有限公司,北京100052

出　　处：《电力电子技术》2024年第8期70-73,共4页Power Electronics

基　　金：国网综合能源服务集团有限公司科技项目(52-7899220009)。

摘　　要：此处分析了以逆变器为接口的分布式微源并联系统的环流产生机理,指出在线路阻抗呈感性时,并联单元间线路阻抗差异和输出电压偏差对系统无功功率均分具有较大影响。为此,提出一种电压源型分布式微源逆变器(VS-DMI)的并联系统均流控制方法,通过在传统微源无功/电压控制环路上叠加一个根据当前无功自适应变化的电压补偿值,可以有效改善由于线路阻抗不一致和电压偏差导致的无功功率不均分,实现并联系统的均流控制。仿真和实验结果验证了该控制策略可以显著抑制功率环流,实现不同线路参数下各台逆变器输出功率的平均分配。The mechanism of circulation generation in parallel distributed micro-source system with inverter as inter-face is analyzed.It is pointed out that the difference of line impedance and output voltage between parallel units have great influence on the equalized reactive power of the system.Therefore,a current sharing control method for voltage source distributed micro-source inverter(VS-DMI)parallel system is proposed.By superimposing a voltage compensa-tion value based on the adaptive change of the current reactive power on the traditional micro-source reactive power/voltage control loop,the reactive power uneven distribution caused by line impedance inconsistency and voltage devi-ation can be effectively improved,and the current sharing control of the parallel system can be realized.The simula-tion and experimental results verify that the control strategy can significantly suppress the power circulation and ach-ieve the average output power distribution of each inverter under different line parameters.

关 键 词：电压源型分布式微源逆变器 并联系统 均流控制 

分 类 号：TM464[电气工程—电器]