| 引用本文: | 叶曙光,孙建军,胡 蕊,刘 钊,刘 飞,王淑惠,邓海波,张 倩.基于LCL滤波器的双向储能变流器研究[J].电力自动化设备,2014,34(7): |
| YE Shuguang,SUN Jianjun,HU Rui,LIU Zhao,LIU Fei,WANG Shuhui,DENG Haibo,ZHANG Qian.Bi-directional power conversion system based on LCL filter[J].Electric Power Automation Equipment,2014,34(7): |
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| 摘要: |
| 为了在中／大型功率并网系统中引入更具优势的LCL滤波器，必须采用特殊的控制策略对LCL滤波器引入的谐振峰加以抑制。从节省双向储能变流器系统成本的角度，提出了一种基于滤波电容电流内环、并网电流外环的双环控制策略。从主电路的参数设计、控制器的参数设计、控制器的性能分析3个方面对策略进行了详细的阐述，并给出了先内环后外环的参数设计方法。搭建了一台50 kW的双向储能变流器作为试验样机，通过实验证明了所提控制策略不仅可以保证LCL滤波器稳定工作，而且可以减小并网电流谐波。 |
| 关键词: 双向储能变流器 滤波器 双环控制 并网逆变器 电流控制 |
| DOI： |
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| 基金项目:国家自然科学基金重大资助项目（51190102）；国家自然科学基金资助项目（51277137，51177113） |
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| Bi-directional power conversion system based on LCL filter |
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YE Shuguang1, SUN Jianjun2, HU Rui3, LIU Zhao1, LIU Fei2, WANG Shuhui1, DENG Haibo1, ZHANG Qian1
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1.King Source，Nanjing 210018，China;2.School of Electrical Engineering，Wuhan University，Wuhan 430072，China;3.Shanghai Electric Power Industrial Co.，Ltd.，Shanghai 200433，China
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| Abstract: |
| When the more prevailing LCL filter is adopted in mid／high-power grid-connection system，special control strategy should be applied to suppress the resonant peak caused by it. A low-cost dual-loop strategy of the inner filter capacitor current control loop and the outer grid-connecting current control loop is proposed for bi-directional power conversion system，which is thoroughly discussed in three aspects：main circuit parameter design，controller parameter design and controller performance analysis. A parameter design method of inner-first-outer-last is given and a prototype of 50 kW bi-directional power conversion system is built. Experimental results verify that，the proposed control strategy ensures the stable operation of LCL filter and reduces the harmonic of grid-connecting current. |
| Key words: bi-directional power conversion system electric filters double-loop control grid-connected inverter electric current control |
