光伏并网逆变器SVPWM双滞环低电压穿越控制  

Low Voltage Ride Through for Photovoltaic Grid-connected Converter SVPWM Based on the Double Hysteresis Loop Current Control

作　　者：茹心芹[1] 王俊辉[1] 

机构地区：[1]中国电力科学研究院,江苏南京210003

出　　处：《电力电子技术》2012年第11期20-22,共3页Power Electronics

摘　　要：空间矢量脉宽调制(SVPWM)双滞环电流控制利用电流误差矢量与参考电压矢量的空间分布给出了最佳的电压矢量切换,使电流误差控制在滞环宽度内。将该方法应用于光伏并网逆变器系统,既能提高光伏逆变器的电流响应速度,又能有效限制电流误差,改善电流跟踪性能,从而提高光伏并网逆变器的低电压穿越(LVRT)能力,并能在电网电压跌落期间提供无功功率以支撑并网点电压。仿真和实验结果表明了该控制方法的正确性和可行性,同时能较好地满足光伏并网逆变器LVRT的要求。The double hysteresis loop current control space vector pulse width modulation （SVPWM） gives the best suitable switching of voltage vector using the space distribution of current error vector and reference voltage vector, and then the current error below the hysteresis width is controlled.Applied to photovoltaic grid-connected inverter,the method has fast current response, and can limit the current error with good current tracking performance, which can enhance the low voltage ride through （LVRT） capability.h also can provide reactive power to support the voltage of the point of interconnection.Simulation and experiment show that the method is valid and feasible,and the requirement of LVRT for inverter is satisfied.

关 键 词：逆变器 光伏并网 双滞环 低电压穿越 

分 类 号：TM464[电气工程—电器]