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电网技术  2018, Vol. 42 Issue (7): 2145-2152    DOI: 10.13335/j.1000-3673.pst.2017.2138
  国家重点研发计划 本期目录 | 过刊浏览 | 高级检索 |
模块化多电平变流器直流短路故障电流计算
段国朝1, 王跃1, 尹太元1, 尹诗媛1, 李广磊2, 孙树敏2
1.西安交通大学 电气工程学院,陕西省 西安市 710000;
2.国网山东省电力公司电力科学研究院,山东省 济南市 250021
DC Short Circuit Current Calculation for Modular Multilevel Converter
DUAN Guozhao1, WANG Yue1, YIN Taiyuan1, YIN Shiyuan1, LI Guanglei2, SUN Shumin2
1. School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710000, Shaanxi Province, China;
2. Shandong Electric Power Research Institute, Jinan 250021, Shandong Province, China
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摘要 模块化多电平换流器直流侧发生短路故障后,等效放电电容计算对短路电流的计算十分重要,受控制系统的影响,等效放电电容难以确定。在一定的假设条件下,通过均值等效的方式得到等效放电电容的解析计算式,并且推导模块等效放电电容取得最大值2C/N和最小值C/N的条件。在此基础上,得到影响等效放电电容的因素:调制比和短路时刻;进一步分析调制比和短路时刻对等效放电电容的影响规律。最后,基于Matlab/Simulink搭建仿真模型,对本文得出的计算公式及结论进行仿真验证。
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段国朝
王跃
尹太元
尹诗媛
李广磊
孙树敏
关键词:  模块化多电平换流器  直流短路电流计算  等效放电电容计算    
Abstract: Calculation of equivalent discharging capacitor is very important for short circuit current calculation when a short circuit fault occurs in dc side of modular multilevel converter. Due to protection delay of control system, evaluation of equivalent discharging capacitor is difficult. This paper derived analytic expression of equivalent discharging capacitor using average equivalent manner, and maximum 2C/N and minimum C/N conditions of the equivalent discharging capacitor were obtained. On this basis, it was found that modulation ratio and short circuit time would influence value of the equivalent discharging capacitor, and specific effects were further analyzed. At last, a Matlab/Simulink model is built to verify correctness of the proposed expression and corresponding conclusion.
Key words:  modular multilevel converter    DC short circuit calculation    equivalent discharging capacitors
收稿日期:  2017-08-30                出版日期:  2018-07-09      发布日期:  2018-07-09      期的出版日期:  2018-07-09
ZTFLH:  TM721  
基金资助: 国家重点研发计划(2016YFB0900902); 国家电网公司科技项目(SGSDDK00KJJS1600143)
作者简介:  段国朝(1992),男,硕士研究生,主要研究方向为柔性直流输电技术,E-mail:guozhao_duan@163.com;王跃(1972),男,通信作者,教授,博士生导师,研究方向为大功率电力电子变换技术,电能质量控制技术;尹太元(1989),男,博士研究生,研究方向为柔性直流输电技术。
引用本文:    
段国朝, 王跃, 尹太元, 尹诗媛, 李广磊, 孙树敏. 模块化多电平变流器直流短路故障电流计算[J]. 电网技术, 2018, 42(7): 2145-2152.
DUAN Guozhao, WANG Yue, YIN Taiyuan, YIN Shiyuan, LI Guanglei, SUN Shumin. DC Short Circuit Current Calculation for Modular Multilevel Converter. POWER SYSTEM TECHNOLOGY, 2018, 42(7): 2145-2152.
链接本文:  
http://www.dwjs.com.cn/CN/10.13335/j.1000-3673.pst.2017.2138  或          http://www.dwjs.com.cn/CN/Y2018/V42/I7/2145
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