| 引用本文: | 郝亮亮,张静,黄银华,熊飞.模块化多电平换流器的分频均压控制策略[J].电力自动化设备,2018,(6): |
| HAO Liangliang,ZHANG Jing,HUANG Yinhua,XIONG Fei.Frequency dividing control of capacitor voltage balance for modular multilevel converter[J].Electric Power Automation Equipment,2018,(6): |
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| 摘要: |
| 随着模块化多电平换流器(MMC)子模块个数的增多，传统基于排序的均压方法存在开关频率偏高和排序计算量偏大的问题。为此提出了分频均压控制策略，使电容电压排序频率远小于触发控制频率，并从理论上给出了此控制策略的排序频率选取方法。通过厦门柔性直流输电示范工程的电磁暂态仿真算例验证了所提出的分频均压控制策略在一定范围内减小排序频率时，可以在满足MMC的运行性能及安全性的前提下，明显减小开关频率和减轻排序计算负担。 |
| 关键词: 模块化多电平换流器 分频控制 开关频率 电压均衡控制 |
| DOI：10.16081/j.issn.1006-6047.2018.06.029 |
| 分类号:TM46 |
| 基金项目:国家重点研发计划资助项目(2017YFB0902600) |
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| Frequency dividing control of capacitor voltage balance for modular multilevel converter |
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HAO Liangliang1, ZHANG Jing1, HUANG Yinhua2, XIONG Fei1
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1.School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China;2.Fujian Electric Power Survey & Design Institute, Fuzhou 350003, China
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| Abstract: |
| With the increase of the sub module number of MMC(Modular Multilevel Converter),the traditional capacitor voltage balancing method has two problems, i. e. high switching frequency and large computation amount. In order to solve these problems, the frequency dividing control strategy of capacitor voltage balance is proposed, which makes the sorting frequency far less than the trigger control frequency. The selection method for sorting frequency in proposed control strategy is given theoretically. The electromagnetic transient simulative results based on Xiamen flexible DC project verify the proposed control strategy reduces the sorting frequency in a certain range, which can meet the running performance and the safety of MMC, and significantly reduce the switching frequency and the computational burden of sorting. |
| Key words: modular multilevel converter frequency dividing control switching frequency voltage balancing control |
