引用本文: | 丁 明,陈 中,张国荣,吴 杰,朱 灿.级联H桥储能变换器直流纹波电流的无源与有源抑制策略[J].电力自动化设备,2016,36(4): |
| DING Ming,CHEN Zhong,ZHANG Guorong,WU Jie,ZHU Can.Passive and active schemes of DC ripple suppression for cascaded H-bridge converter of energy storage system[J].Electric Power Automation Equipment,2016,36(4): |
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摘要: |
级联H桥储能变换器直流纹波电流会给储能系统带来效率降低、寿命减少、并网谐波增大等不利影响。分析了电容滤波、LC滤波、LC串联谐振3种无源滤波电路抑制直流链纹波电流的方法,以及它们减小直流链纹波电流的可行性。提出了基于耦合变压器直流有源滤波电路的级联H桥储能变换器拓扑,利用直流有源滤波电路吸收直流链纹波电流,减少流入级联H桥储能变换器直流端口的纹波电流。最后,通过仿真验证了有源滤波方法减小直流链纹波电流的有效性。 |
关键词: 储能 级联H桥变换器 直流链纹波电流 无源滤波电路 直流有源滤波电路 变换器 电流控制 |
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基金项目:国家高技术研究发展计划(863 计划)资助项目(2015A- A050104) |
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Passive and active schemes of DC ripple suppression for cascaded H-bridge converter of energy storage system |
DING Ming, CHEN Zhong, ZHANG Guorong, WU Jie, ZHU Can
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Anhui New Energy Utilization and Energy Saving Laboratory,Hefei University of Technology,Hefei 230009,China
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Abstract: |
The DC-link ripple current of cascaded H-bridge converter has negative effects on the energy storage system,such as lower efficiency,reduced lifetime,increased grid-connecting harmonic,etc. Three kinds of passive filter,i.e. capacitor-filter,LC-filter and LC-resonant filter,and the feasibility of applying them to suppress the DC-link ripple current are analyzed. A cascaded H-bridge converter topology based on CTDC-APF(DC Active Power Filter with Coupling Transformer) is proposed,which adopts the DC active filtering circuit to absorb the ripple current of DC-link for reducing the ripple current at the DC port of cascaded H-bridge converter. Simulative results show its effectiveness. |
Key words: energy storage cascaded H-bridge converter DC-link ripple current passive filter DC active filter electric converters electric current control |