采用虚拟功率下垂特性的多环控制策略的微电网研究

Research on multiple-loop control strategy of micro-grid using the virtual power droop characteristics

文中在二端口功率传输模型基础上,分析了微电网常规的下垂控制策略,发现线路呈现不同状态时,常规控制策略控制下的有功功率和无功功率耦合性较强。针对功率耦合问题,探究了一种采用坐标旋转的虚拟功率控制策略,通过坐标旋转正交变换矩阵,完成在耦合条件下的功率解耦。同时,在此基础上研究了逆变器的多环控制策略,提出了采用虚拟功率的双环控制策略。通过Matlab/Simulink对所提出的模型进行了仿真研究,验证了结果的有效性。

This paper analyzed the conventional droop control strategy of micro grid based on the two-port power transmission model and analyzing,and then the strong coupling of active power and reactive power have been found during the circuit presents the different states under conventional control strategy. For the power coupling problems,a virtual power control strategy with coordinate rotation matrix through rotation orthogonal transformation has been explored,which completes power decoupling in coupling conditions. Meanwhile,multiple-loop control strategy of inverter is studied on the basis of using virtual power strategy. Finally,Matlab / Simulink simulation studies on the proposed model verify the validity of the results.