| MMC型VSC-HVDC系统电容电压的优化平衡控制 |
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| 引用本文： | 管敏渊,徐政. MMC型VSC-HVDC系统电容电压的优化平衡控制[J]. 中国电机工程学报, 2011, 31(12) |
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| 作者姓名： | 管敏渊 徐政 |
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| 作者单位： | 浙江大学电气工程学院,浙江省,杭州市,310027 |
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| 基金项目： | “十一五”国家科技支撑计划重大项目(2006BAA02A21)~~ |
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| 摘 要： | 介绍模块化多电平换流器(modular multilevel converter,MMC)电容电压平衡的原理以及子模块(sub-module,SM)电容的充放电过程.指出传统的电容电压平衡控制下,子模块投切较频繁,器件开关频率较高,会造成较大的开关损耗.针对传统方法的问题,提出一种适合MMC型直流输电系统的电容电压优化平衡控制策略,将平衡控制的重点放在电容电压越限的子模块上.对电容电压未越限的子模块,优化策略通过引入保持因子使具有一定的保持原来投切状态的能力,以降低开关器件的开关频率.使用PSCAD/EMTDC对优化控制策略进行仿真,结果表明优化平衡控制策略与传统方法相比,可以在基本不增加电容电压波动的前提下,显著降低器件的开关频率.
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| 关 键 词： | 电压源换流器 电压源换流器型直流输电 模块化多电平换流器 子模块 电容电压平衡 保持因子 |
Optimized Capacitor Voltage Balancing Control for Modular Multilevel Converter Based VSC-HVDC System |
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| GUAN Minyuan , XU Zheng. Optimized Capacitor Voltage Balancing Control for Modular Multilevel Converter Based VSC-HVDC System[J]. Proceedings of the CSEE, 2011, 31(12) |
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| Authors: | GUAN Minyuan XU Zheng |
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| Affiliation: | GUAN Minyuan,XU Zheng(College of Electrical Engineering,Zhejiang University,Hangzhou 310027,Zhejiang Province,China) |
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| Abstract: | This paper investigated the capacitor voltage balancing problem of the modular multilevel converter(MMC) and the charge and discharge process of sub-module capacitors.The requirement to reduce the switching frequency of power electronic devices is not satisfied in the conventional capacitor voltage balancing control,since it results in high switching losses.To solve this problem,an optimized capacitor voltage balancing control for MMC based VSC-HVDC transmission system was proposed.The optimized voltage bal... |
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| Keywords: | voltage source converter voltage source converter based high voltage direct current(VSC-HVDC) modular multilevel converter(MMC) sub-module capacitor voltage balancing maintaining factor |
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