摘要
海上风电是可再生能源的重要形式和组成部分,通过基于电压源换流器的高压直流输电(VSC-HVDC)技术进行风电的远距离接入,使远离海岸的区域建设风电场成为可能,另外该技术也具备更大规模风场的接入能力。目前世界范围已有多个应用VSC-HVDC输电系统将海上风电场接入到陆上主电网的工程规划。然而,大规模风电会对系统的稳定性带来诸多挑战,尤其需要确保在故障工况下风电场及主电网的稳定性,VSC-HVDC以其优良的灵活性成为应对此类挑战的不二选择。本文对不同风电接入方式下系统的故障穿越方案进行了总结,对VSC-HVDC系统的故障穿越性能进行了研究,分析了故障下系统盈余能量对直流电压的影响,并提出了应用直流侧可控耗能电阻(DC Chopper)来维持系统中的能量平衡的方案。本方案使系统在故障清除后具备迅速重启的能力,为电网的可靠运行提供了理论支撑。
Wind power generation is one of the most important renewable source, offshore wind energy has become one of the biggest segments in renewable energy sources during the past decade. Utilization of voltage source converter based high-voltage direct-current(VSC-HVDC) technology has enabled more remote installation of windfarms and more power generation. Several VSC-HVDC links are in planning all around the world to connect the remote offshore windfarms to onshore power grids. However, the high penetration of wind energy brings some challenges for system stability, particularly during the fault cases, VSC-HVDC is the solution for these challenges due to its excellent flexibility. This paper summarized the fault ride through solution of different windfarm connection solutions, for VSC-HVDC system fault case is further analyzed and studied. It shows how the DC-side voltage is influenced by excessive energy in the system during the AC-side faults.As a solution, it is proposed to utilize the DC-side chopper to maintain the energy balance in the connected system. The solution presented in this paper enables the fast restart capability after the fault clearance, which is an important criterion for reliable power grid.
作者
王国英
贾一凡
邓娜
Arman Hassanpoor
WANG Guoying;JIA Yifan;DENG Na;Arman Hassanpoor(ABB(China)Co.,Ltd.,Chaoyang District,Beijing 100016,China)
出处
《全球能源互联网》
2019年第2期146-154,共9页
Journal of Global Energy Interconnection
作者简介
王国英(1985),男,高级工程师,现供职于ABB(中国)有限公司HVDC研发部,研究领域为HVDC系统设计、换流阀、控制保护等,E-mail:forrest-guoying.wang@cn.abb.com;贾一凡(1986),男,高级工程师,研究领域为HVDC系统设计、换流阀、电力电子设备等;邓娜(1988),女,工程师,研究领域为HVDC系统设计、换流阀、电力电子设备等;Arman Hassanpoor,男,博士,长期从事高压直流输电以及电力电子的仿真研究。
