中文摘要：

文章针对大规模直驱风电场并网后高压直流输电方案，构建系统网络拓扑结构，建立系统数学模型，并制定相关控制策略。基于PSCAD／EMTDC软件，通过对风电场接人、风速波动、交流系统及直流系统短路故障的仿真，分析了大规模直驱风电场与交直流混联系统的相互影响。仿真结果表明，含大规模直驱风电场的交直流混联系统需要有足够强的交流系统及足够大的火电容量作支撑，风电场PCC母线短路会引起直流系统控制方式的变化，直流系统故障对风电场的影响可忽略不计。

英文摘要：

Aiming to HVDC electricity transmission program with large-scale D-PMSG wind farm connected to grid, a mathematical model of large-scale D-PMSG wind farm and HVDC system is estab- lished, and its network topology and interrelated control strategies are set up. Based on PSCAD / EMT- DC ,the interaction between large-scale D-PMSG wind farm and AC/DC system is analyzed when dis- turbances occurs, such as wind farms connecting to grid, wind speed change and short circuit fault, etc. Simulation results show that the AC-DC system with large-scale D-PMSG wind farms needs to have a sufficiently strong AC system and enough thermal power capacity, there are some mutual influence when the AC and DC system has a short circuit fault occurs.