电工技术学报  2015, Vol. 30 Issue (12): 136-142    DOI:
电力电子 |
柔性直流输电系统中模块化多电平变流器的直流侧充电策略分析
楚遵方,李耀华,王平,李子欣,高范强,徐飞
中国科学院电力电子与电气驱动重点实验室 中国科学院电工研究所 北京市 100190
Analysis of Charging Strategy by DC Grid of Modular Multilevel Converter in High Voltage Direct Current Transmission System
Chu Zunfang,Li Yaohua,Wang Ping,Li Zixin,Gao Fanqiang,Xu Fei
Key Laboratory of Power Electronics and Electric Drive Institute of Electrical Engineering Chinese Academy of Sciences Beijing 100190 China
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摘要 本文首先对柔性直流输电系统中的模块化多电平变流器的充电方式进行了分析.当柔性直流输电系统连接无源负载时受端站就需要通过直流侧进行充电.本文通过推导模块化多电平变流器直流侧数学模型得出直流侧充电必然存在过充现象.为了抑制过充电压幅值,本文提出了一种直流侧可控充电策略.并根据模块化多电平变流器本身的限制条件推导出充电系数的取值公式.同时,分析了充电电流的变化过程并根据数学模型计算得到充电电流的最大值,为模块化多电平变流器充电系统的设计提供了理论依据.最后,通过实验验证了本文提出的充电策略的可行性和有效性.
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楚遵方
李耀华
王平
李子欣
高范强
徐飞
关键词 柔性直流输电模块化多电平变流器充电策略无源负载    
Abstract:In this paper, the charge modes of Modular Multilevel Converter (MMC) in High Voltage Direct Current Transmission System (HVDC) are studied. The charge mode is by dc grid when MMC is connected to the passive network. The over charge must be exist according to the mathematical model of MMC. In order to suppress overvoltage, a new charging strategy by dc grid at controllable situation is proposed. And the calculation formulas of the charging coefficients are given by the limits of MMC. Meanwhile, the change trend of charging current is researched and the maximum value is computed by mathematical model of MMC. Experiment results on a HVDC based on MMC show validity of the proposed method.
Key wordsHigh Voltage Direct Current Transmission System(HVDC)    Modular Multilevel Converter (MMC)    Charge mode    passive network   
收稿日期: 2014-07-24      出版日期: 2015-09-14
PACS: TM464  
基金资助:国家863计划课题(2014AA052602)
作者简介: 楚遵方 男,1982年生,博士研究生,主要从事高压大容量变流器,柔性直流输电等方面的研究工作.李耀华 男,1966年生,研究员,博士生导师,主要从事电力电子变流技术,电机分析与控制技术,磁悬浮技术等方面的研究工作.
引用本文:   
楚遵方,李耀华,王平,李子欣,高范强,徐飞. 柔性直流输电系统中模块化多电平变流器的直流侧充电策略分析[J]. 电工技术学报, 2015, 30(12): 136-142. Chu Zunfang,Li Yaohua,Wang Ping,Li Zixin,Gao Fanqiang,Xu Fei. Analysis of Charging Strategy by DC Grid of Modular Multilevel Converter in High Voltage Direct Current Transmission System. Transactions of China Electrotechnical Society, 2015, 30(12): 136-142.
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