中文摘要：

提出了一种基于比例积分-比例谐振（PI-PR）控制策略,实现了单位功率因数并网,解决了故障期间的低电压穿越问题。通过MATLAB/Simulink进行仿真,验证了PI-PR控制方法在电网发生电压短路故障时,可以同时实现抑制谐波和快速发出无功功率,为研究光伏系统低电压穿越谐波抑制提供了理论参考。

英文摘要：

PI-PR（ proportion integration-proportion resonant） control strategy was proposed to solve the problem of the unit power factor grid-connecred control and the low voltage across during the fault. Through the simulation in MATLAB / Simulink,it verifies that when the power grid voltage drop failure occurs,the control method can restrain harmonic and quickly issue reactive power,which validates the effectiveness of the proposed control strategy,and provides theoretical reference for low voltage across the harmonic suppression.