摘要
随着地理上高度分散的近海风电场的大规模开发,传统并网方式已不能满足要求,提出了风电场经多端柔性直流输电系统及交流线路与电网互联的策略,并设计了各换流站的控制方法。建立了VSC-HVDC的数学模型,并分析了其工作原理。在PSCAD/EMTDC的仿真环境下,搭建了含多端柔性直流输电系统的模型,分析了混合输电方式下电网运行的稳定性。仿真结果表明交直流混合输电模式灵活、可靠、经济,风电场出口处短路故障切除后电压能够快速恢复,确保了风电的可靠输出。
With the large-scale development of offshore wind farms dispersed highly geographically, the traditional way of grid connection can＇t meet the requirements. Therefore, the strategy that wind farm is connected to the grid through Multi-terminal VSC-HVDC power transmission system（VSC-MTDC） and AC line is proposed, and the control methods for converter station are also designed. The mathematical model of VSC-HVDC is built, and its working principle is analyzed. The model of AC-DC hybrid transmission system which contains VSC-MTDC is built in PSCAD/EMDTC,and the stability characteristics of grid in the hybrid transmission mode is analyzed. The simulation results show that the AC-DC hybrid model is flexible, reliable and economical, and the voltage can recover fast after the removal of short circuit fault at the outlet of wind farms, then the output of wind farms is ensured reliably.
出处
《华东电力》
北大核心
2013年第10期2019-2022,共4页
East China Electric Power
基金
国家重点基础研究发展计划(2013CB228204)
国家高技术研究发展计划(2011AA05A119)
国家电网公司科技项目资助~~
