基于多重PR控制的LCL型逆变器谐波抑制  

Multiple PR Control Based Harmonic Suppression for LCL Inverter

作　　者：陈建国 曾斌 

机构地区：[1]四川东方电气自动控制工程有限公司,四川德阳618000

出　　处：《电力电子技术》2015年第4期91-93,共3页Power Electronics

摘　　要：在新能源发电系统中。三相光伏和储能逆变器通常都采用LCL型结构以减小开关频率谐波。通过提高增益减小谐波的传统PI控制方法实现简单,但在实际电网电压中含有丰富的谐波成分,无法在保证系统稳定性的同时具备足够能力来抑制电网电压中的工频谐波。分析电网谐波周期性特点,将重复控制与比例谐振(PR)控制结合起来,设计了多重PR控制算法来抑制LCL型逆变器的谐波。分别采用所提的多重PR控制算法和传统PI控制算法在50 kVA的储能逆变器上进行实验,证明多重PR控制算法对谐波抑制具有更好的效果。In the new energy generation systems, three-phase PV inverter and energy storage inverter usually adoptes LCL type structure to reduce harmonics in switching frequency.The conventional PI control method can reduce harmonic by increasing the gain, but the actual grid voltage contains a variety of harmonic components, PI control can not have sufficient capacity to keep system in stable and suppress harmonic in power frequency voltage at the same time.This paper analyzes the cyclical characteristic of the harmonic,proposed multiple proportional resonant（PR） control algorithm to suppress harmonic of LCL inverter by combining the repetitive control and proportional resonant control.Proposed multiple PR algorithm and conventional PI algorithm are adopted in a prototype of 50 kAV storage energy inverter respectively, experimental results show that the proposed algorithm has better effect in harmonic suppression.

关 键 词：逆变器 重复控制 比例谐振控制 

分 类 号：TM464[电气工程—电器]