| 引用本文: | 赵思远,徐康泰,郎博宇,乔平,陈鑫.基于故障清除专用自阻模块的改进型MMC运行控制策略[J].电力自动化设备,2021,41(5): |
| ZHAO Siyuan,XU Kangtai,LANG Boyu,QIAO Ping,CHEN Xin.Operating control strategy of advanced MMC based on fault-clearing special self-resistance module[J].Electric Power Automation Equipment,2021,41(5): |
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| 摘要: |
| 为解决传统半桥型模块化多电平换流器(HB-MMC)的直流故障清除问题，在传统HB-MMC的每个桥臂上分别增加了一个全桥结构的故障清除专用自阻模块，并通过合理的控制方法实现其稳态运行时电容电压波动情况的优化及直流故障时交流侧三相短路点的主动制造，从而实现改进型MMC稳态时的高效运行与基于无断流能力隔离开关对直流故障的清除。相比于传统的混合型MMC，改进型MMC不仅保留了直流故障快速清除的能力，同时在构建成本与运行损耗方面具有明显优势。基于MATLAB/Simulink仿真平台验证了所提结构与控制策略的正确性与有效性。 |
| 关键词: 中压直流配电网 改进型MMC 直流故障清除策略 故障清除专用自阻模块 电容电压优化控制 |
| DOI：10.16081/j.epae.202105029 |
| 分类号:TM732;TM46 |
| 基金项目:国家自然科学基金资助项目(51877116)；国家电网公司总部科技项目(XTB17201600215) |
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| Operating control strategy of advanced MMC based on fault-clearing special self-resistance module |
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ZHAO Siyuan, XU Kangtai, LANG Boyu, QIAO Ping, CHEN Xin
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State Grid Jibei Electric Power Company Limited Engineering Management Company, Beijing 100070, China
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| Abstract: |
| To solve the DC fault-clearing issue of traditional HB-MMC(Half-Bridge Modular Multilevel Converter),a fault-clearing special self-resistance module is added to each arm of traditional HB-MMC. Meanwhile, the reasonable control methods which are employed to optimize the fluctuation of the capacitor voltage in steady state and form the AC three-phase short circuit point actively under DC fault are also proposed. Thus, the efficient operation of the advanced MMC in steady state and the DC fault-clearing capacity caused by the isolating switch with interruption-free capacity can be realized. Compared with the traditional hybrid MMC, the proposed advanced MMC not only has the capability to clear the DC fault-clearing quickly, but also has obvious advantages in construction cost and operation loss. The simulative results based on MATLAB/Simulink platform validate the correctness and effectiveness of the proposed topology and control strategy. |
| Key words: medium voltage DC distribution network advanced MMC DC fault-clearing strategy fault-clearing special self-resistance module optimal control of capacitor voltage |
