文章摘要
基于电池储能的MMC-HVDC系统的建模与仿真
Modeling and Simulation of Battery Energy Storage System based MMC-HVDC
投稿时间:2019-12-17  修订日期:2020-01-20
DOI:
中文关键词: 模块化多电平换流器(MMC)  高压直流输电系统(HVDC)  电池能量储存系统(BESS)  故障特性  有功解耦
英文关键词: modular multilevel converter (MMC), HVDC, battery energy storage system (BESS), fault performance, active power coupling
基金项目:
作者单位E-mail
刘耀 全球能源互联网集团有限公司 15927651450@163.com 
吴佳玮 全球能源互联网集团有限公司  
赵小令 全球能源互联网集团有限公司  
肖晋宇 全球能源互联网集团有限公司  
侯金鸣 全球能源互联网集团有限公司  
余敬秋 浙江大学电气工程学院  
徐雨哲 浙江大学电气工程学院  
徐政 浙江大学电力系统自动化研究所所长 Xuzheng007@zju.edu.cn 
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中文摘要:
      于交直流混联电网中的交流系统和直流系统之间存在有功功率耦合,因此基于模块化多电平换流器的高压直流输电系统(MMC-HVDC)无法完全隔离故障时交直流侧之间的相互影响。而基于电池能量存储系统(BESS)的MMC-HVDC系统可以实现HVDC系统的独立解耦控制,充分发挥MMC-HVDC系统的“防火墙”功能。本文首先分析了基于BESS的MMC-HVDC系统的基本结构和工作原理。然后,基于数值积分和嵌套的快速仿真方法,推导了基于BESS的子模块和基于BESS的MMC换流器的戴维南等效电路。最后,搭建了一个±400 kV的两端MMC-HVDC系统对所提出的建模方法和系统的解耦效果进行了验证。结果表明,基于BESS的MMC-HVDC系统的交流侧有功功率和直流侧功率可以彼此解耦,在交流或直流故障期间可以保持功率的正常输送,克服了故障时交流系统失稳的可能性。
英文摘要:
      There is active power coupling between ac system and dc system in ac/dc interconnected power grid, and modular multilevel converter based HVDC (MMC-HVDC) system could not completely isolate the fault from ac system to dc system or dc system to ac system. In order to achieve the effect of independent decoupling operation of HVDC system and make full use of "firewall" function of the MMC-HVDC system, the battery energy storage system (BESS) based MMC-HVDC system is a preferred choice. For the BESS based MMC-HVDC system, this paper firstly analyzes the basic structure and operation principal. Then, based on numerical integration and nested fast and simultaneous simula-tion approach, this paper derives the Thévenin equivalent circuit of BESS based SMs and BESS based MMC. The case studies are performed on a ±500 kV 2-ternimal MMC-HVDC system. The time-domain simulation results show that the ac side active power and the dc side power of the BESS based MMC-HVDC system can be decoupled from each other, and the transmitting power during and after the ac or dc fault can be kept.
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