摘要
针对并网逆变器LCL输出滤波器三阶系统的不稳定性和电流谐波所带来的损耗问题,推导电感比、阻尼电阻值与谐振频率、电流谐波衰减比以及阻尼损耗之间的关系表达式,以此为依据,提出一种在保证滤波性能的前提下阻尼损耗最小的滤波器参数优化设计方案。优化方案在保证滤波效果的同时,可以减小电感取值,降低阻尼损耗,尤其适用于大中功率场合。仿真和实验结果验证了理论的正确性和优化方案的有效性。
As to the problem of LCL filter instability and loss conducted by current harmonics,the relational expression between inductance ratio,damping resistor and resonant frequency,harmonic attenuation ratio,as well as damping power loss was deduced.Based on this,an optimized filter design scheme was proposed which warrants a minimal damping power loss with a needed filtering performance.The optimization can reduce the inductance value and power loss,especially in large-or medium-power applications.Feasibility and effectiveness of the optimized scheme are validated by simulation and experimental results.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2010年第27期90-95,共6页
Proceedings of the CSEE
基金
黑龙江省自然科学基金项目(E200625)~~
关键词
并网逆变器
LCL滤波器
优化设计
阻尼损耗最小
grid-connected inverter
LCL filter
optimized design
minimal damping power loss
