LCL型并网逆变器的分裂电容无源阻尼控制Split-Capacitor Passive Damping Control for LCL Grid-Connected Inverter
王海松;王晗;张建文;蔡旭;
摘要(Abstract):
采用电容支路串联电阻的无源阻尼方案能够较好解决LCL型并网逆变器存在的电流谐振问题,但其存在阻尼电阻功率损耗较大的缺点。为此,提出了分裂电容无源阻尼方案。该方案将LCL的电容支路均分为2部分,只在其中一半电容上串联阻尼电阻。分析了该方案下LCL滤波器在固有谐振峰值的阻尼效果,并对比了不同阻尼电阻下其与传统方案的功率损耗情况。结果表明,相比传统的完全电容阻尼方案,选择合适的阻尼电阻后,采用所提方案能够获得几乎相同的阻尼效果,且能够降低阻尼电阻功率损耗。仿真结果验证了理论分析的正确性。
关键词(KeyWords): LCL滤波器;并网逆变器;无源阻尼控制;完全电容;分裂电容
基金项目(Foundation): 国家863高技术基金项目(003 2011AA05A104);; 国家电网科技项目(风电场聚合模型研究)资助~~
作者(Author): 王海松;王晗;张建文;蔡旭;
Email:
DOI: 10.13335/j.1000-3673.pst.2014.04.012
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