中国电力 ›› 2013, Vol. 46 ›› Issue (8): 30-34.DOI: 10.11930/j.issn.1004-9649.2013.8.30.4

• 风光储专栏 • 上一篇    下一篇

用于光伏发电系统的LLCL型滤波器混合阻尼控制策略

李嘉俊, 张建成, 李倩, 李凡   

  1. 华北电力大学 新能源电力系统国家重点实验室,河北 保定 071003
  • 收稿日期:2013-04-15 出版日期:2013-08-23 发布日期:2015-12-10
  • 作者简介:李嘉俊(1988—),男,吉林通化人,硕士研究生,从事光伏系统并网逆变器控制策略研究。
  • 基金资助:
    国家自然科学基金资助项目(51177047)

Hybrid Damping Control Strategy for LLCL Filters of PV Systems

LI Jia-jun, ZHANG Jian-cheng, LI Qian, LI Fan   

  1. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University, Baoding 071003, China
  • Received:2013-04-15 Online:2013-08-23 Published:2015-12-10

摘要: 为使光伏系统并网电流谐波满足电力系统的要求,提出采用基于LLCL型滤波器的并网逆变器,并对其进行有源及无源相结合的混合阻尼控制。通过对混合阻尼参数的取值进行合理设计,使无源阻尼与有源阻尼的控制优势得以更好的结合与发挥。在Matlab/Simulink环境下对控制方案进行仿真,结果表明,混合阻尼控制方案下的LLCL型滤波器不但具有衰减开关频率次谐波和节省电网侧电感的优点,还具有较好的滤波能力,可以满足并网电流的谐波含量限制要求。

关键词: 光伏发电系统, 并网, LLCL型滤波器, 混合阻尼控制

Abstract: In order to make the photovoltaic(PV) system meet the standards on grid-connected current harmonics, an LLCL filter-based inverter is developed with a hybrid active and passive damping control strategy. By setting the parameters of the hybrid damping scheme properly, the advantages of passive and active damping controls are combined and made full use. Finally, the presented control scheme is simulated by the program of Matlab/Simulink, which shows that the LLCL filter with a hybrid damping control scheme can not only attenuate the harmonics around the switching frequency and reduce the inductance of the grid side, but also demonstrate its good filtering capability to guarantee the grid-connected current harmonics complied with the related standards.

Key words: photovoltaic system, integration with grid, LLCL filter, hybrid control scheme with active and passive damping resistor

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