| 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 |
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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 |
