含大规模风、光电场的多端柔性直流输电系统控制与建模仿真

Control and Simulation of Multi Terminal Flexible DC Power Transmission System at Large Scale Wind Solar Power Farm

总结了现有柔性直流系统的设计与控制策略,研究新能源电场的控制与仿真模型。在此基础上,考虑大规模风、光电场同时接入系统,设计阀组级、换流站级以及系统级控制方式,建立基于PSCAD/EMTDC的多端柔性直流输电模型。最后介绍了改变新能源场出力,设置交流侧故障,仿真并分析系统运行及响应情况。所得仿真结果在大规模新能源并网及多端柔性直流输电方面,均有借鉴意义。

Large scale unstable wind solar power farm grid-connected has impact on current state grid. Multi terminal flexible dc power transportation system belongs to ideal new energy grid-connected solution which has flexible power adjustment and distribution ability. The article summarizes new energy farm control and simulation model. Based on it, the author thinks about large scale wind solar power farm connecting grid at the same time and designs valve group level and current converter station level and system control method based on PSCAD/EMTDC multi terminal flexible dc power transportation system model. Finally the author simulates and analyzes system operation and reaction condition while changing new energy farm output and setting up AC side fault. All simulation results have reference value for large scale new energy grid-connected with multi terminal flexible dc power transportation.