基于PQR理论的三电平LCL滤波器优化设计  

Performance Improvement of Three Level LCL-filter Using PQR Power Transformation

作　　者：李泉峰[1] 杨涛[1] 吕征宇[1] 

机构地区：[1]浙江大学电气工程学院,浙江杭州310027

出　　处：《电力电子技术》2011年第5期27-28,共2页Power Electronics

摘　　要：在并网逆变器中,LCL滤波器以其良好的滤波效果受到广泛应用。但其本身存在谐振问题,若滤波器的设计及控制策略不合适,会导致系统不稳定。根据PQR理论,分析p,q,r坐标变换及功率的定义,通过分析得出针对LCL滤波器的补偿控制算法。仿真和实验证明,该方案能有效提高并网逆变器输出电能质量。The LCL filter is widely applied in the grid-connected inverter as preferable high frequency attenuation characteristic.The LCL filter will resonate if the design of the filter or the control method isn＇t suitable.Using PQR theory,the PQR transformation and the definition of the p,q,r coordinate are analyzed.This paper presents a compen-sation method to improve this issues,so that the performance of the designed LCL filter system can be improved.The effectiveness of the proposed algorithm is verified by simulation and experiment.

关 键 词：滤波器 谐波 补偿控制 

分 类 号：TN713[电子电信—电路与系统]