一种微电网并网接口混联主电路及控制方法

A Hybrid Main Circuit of Micro-grid Grid-connection Interface and Control Method

为提高微电网并网连接点的电能质量,提出了一种微电网并网接口混联主电路及控制方法。该主电路通过整流器稳定直流输出电压,通过并联逆变器和串联逆变器补偿并网点谐波电流和谐波电压。最后,采用Matlab/Simulink对所提出的主电路与控制方法进行仿真验证。仿真结果表明:微电网并网接口混联主电路及其控制方法可以改善微电网并网连接点电流和电压的质量,实现了微电网与主电网之间的友好并网。

In order to improve the power quality of micro-grid at the grid-connection point, a hybrid main circuit of micro-grid grid-connection interface and control method is proposed, The DC output voltage of the main circuit is stabilized by rectifier, and harmonic current and voltage at the grid-connection point is compensated by the parallel inverter and the series inverter. Finally, the proposed main circuit and control method is testified and simulated by Matlab/Simulink. Simulation results show that the current and voltage qualities at the grid-connection point of the micro-grid can be improved by the hybrid main circuit of micro-grid gridconnection interface and control method which realizes the friendly grid-connection.