| 基于模块化多电平的统一潮流控制器换流器和直流侧故障特征分析及保护配置 |
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| 引用本文： | 祁欢欢,陆振纲,陈静,李鹏,李厚源,郑涛.基于模块化多电平的统一潮流控制器换流器和直流侧故障特征分析及保护配置[J].电力系统保护与控制,2018,46(20):59-68. |
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| 作者姓名： | 祁欢欢 陆振纲 陈静 李鹏 李厚源 郑涛 |
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| 作者单位： | 全球能源互联网研究院先进输电技术国家重点实验室;国网江苏省电力公司电力科学研究院;新能源电力系统国家重点实验室(华北电力大学) |
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| 基金项目： | 国网江苏省电网公司科技项目资助(J2017041):500 kV统一潮流控制器系统应用技术研究 |
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| 摘 要： | 统一潮流控制器(Unified Power Flow Controller, UPFC)是为实现对交流线路的实时控制和动态补偿而提出的串并联混合型灵活交流输电系统装置,其换流器和直流侧的故障特征复杂,对保护要求高。首先介绍基于模块化多电平换流器(Modular Multilevel Converter, MMC)的UPFC基本结构与工作原理,其次分析了换流器和直流侧几种典型故障的故障特征。在此基础上,给出了换流器和直流侧保护配置方案。针对换流器桥臂单相接地故障和直流侧单极接地故障情况下保护可靠性低的问题,提出了改进的保护配置方案。最后结合RTDS仿真实验,验证了所给出的UPFC保护配置方案的有效性。
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| 关 键 词： | 模块化多电平换流器 统一潮流控制器 故障特性 保护配置 差动保护 |
| 收稿时间： | 2017/9/26 0:00:00 |
| 修稿时间： | 2017/12/12 0:00:00 |
Converter and DC side fault characteristics and protection scheme of the unified power flow controller based on modular multilevel converter |
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| QI Huanhuan,LU Zhengang,CHEN Jing,LI Peng,LI Houyuan and ZHENG Tao.Converter and DC side fault characteristics and protection scheme of the unified power flow controller based on modular multilevel converter[J].Power System Protection and Control,2018,46(20):59-68. |
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| Authors: | QI Huanhuan LU Zhengang CHEN Jing LI Peng LI Houyuan and ZHENG Tao |
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| Affiliation: | State Key Laboratory of Advanced Power Transmission Technology, Global Energy Interconnection Research Institute, Beijing 102209, China,State Key Laboratory of Advanced Power Transmission Technology, Global Energy Interconnection Research Institute, Beijing 102209, China,Electric Power Research Institute, State Grid Jiangsu Electric Power Company, Nanjing 211102, China,Electric Power Research Institute, State Grid Jiangsu Electric Power Company, Nanjing 211102, China,State Key Laboratory of New Energy Power System North China Electric Power University, Beijing 102206, China and State Key Laboratory of New Energy Power System North China Electric Power University, Beijing 102206, China |
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| Abstract: | The Unified Power Flow Controller (UPFC) is one of the Flexible AC Transmission System (FACTS) devices used in transmission line for real-time control and dynamic compensation. The converter and DC side have complicated fault characteristics, the effect of fault is an inevitable issue. This paper first introduces the basic structure and operating principle of MMC-UPFC, next analyzes fault characteristics of several typical converter side and DC side fault. According to the analysis, the protection scheme for MMC-UPFC converter and DC side is proposed. Moreover, aiming at the problem that conventional differential protection for converter arm single-phase-to-ground fault and DC side single-pole-to-ground fault cannot meet the requirement of reliability, an improved protection scheme is proposed. Simulation results based on Real-Time Digital Simulator (RTDS) verify the proposed protection scheme. This work is supported by Science and Technology Project of State Grid Jiangsu Electric Power Company (No. J2017041). |
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| Keywords: | modular multilevel converter unified power flow controller fault characteristics protection scheme differential protection |
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