| 多端柔性直流输电系统中停运换流站再并列方法 |
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| 引用本文： | 张海涛,王辉,岳伟,王刚. 多端柔性直流输电系统中停运换流站再并列方法[J]. 南方电网技术, 2014, 8(6): 48-52 |
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| 作者姓名： | 张海涛 王辉 岳伟 王刚 |
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| 作者单位： | 荣信电力电子股份有限公司，北京100084;荣信电力电子股份有限公司，北京100084;荣信电力电子股份有限公司，北京100084;荣信电力电子股份有限公司，北京100084 |
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| 基金项目： | 国家高技术研究发展计划（863计划）(2011AA05A102)。 |
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| 摘 要： | 基于模块化多电平换流器技术,以三端柔性直流输电系统为例,提出一种新的将VSC-MTDC(voltage source converter multi-terminal HVDC)停运换流站并入运行系统的操作流程。分析流程中停运站闭锁STATCOM方式运行稳定后形成的2种电流通路,由直流电容侧电压暂态公式推算直流侧隔离开关的最佳合闸时间,以避免产生冲击电流,提高多端柔性直流输电系统的稳定性和可靠性。数字仿真验证了该再并列方法的有效性。
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| 关 键 词： | VSC-MTDC 停运换流站 再并列 冲击电流 合闸时间 |
Re-paralleling Method of Shut-down Converter Stations in MMC-MTDC Transmission System |
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| ZHANG Haitao,WANG Hui,YUE Wei and WANG Gang. Re-paralleling Method of Shut-down Converter Stations in MMC-MTDC Transmission System[J]. Southern Power System Technology, 2014, 8(6): 48-52 |
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| Authors: | ZHANG Haitao WANG Hui YUE Wei WANG Gang |
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| Affiliation: | Rongxin Power Electronic Co, Ltd, Beijing 100084, China;Rongxin Power Electronic Co, Ltd, Beijing 100084, China;Rongxin Power Electronic Co, Ltd, Beijing 100084, China;Rongxin Power Electronic Co, Ltd, Beijing 100084, China |
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| Abstract: | Based on modular multilevel inverter technology, and with a three side flexible HVDC system as an example, this paper proposes a new re-paralleling process for the shut-down stations re-paralleling into the operating VSC-MTDC system.Two current paths after the converter station running stably in STATCOM lockout mode is analyzed, and the optimal closing time for DC disconnector is obtained from the calculation with transient formula of DC capacitor voltage so to avoid impact current, and improve the stability and reliability of the MTDC system.The effectiveness of the re-paralleling method is verified by digital simulations. |
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| Keywords: | VSC-MTDC (voltage source converter multi-terminal HVDC) shut-down converter station re-paralleling impact current closing time |
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