永磁直驱型风电场的并网仿真研究

为了研究风电并网对接入点电网电压的影响,以永磁直驱风力发电机组为研究对象,在PSCAD/EMTDC仿真平台上建立基于实际运行数据的永磁直驱风电机组仿真模型,并进行风电场等值建模。利用BPA和PSCAD/EMTDC软件建立福建省某区域电网的等值模型,对大规模风电接入区域电网引起的电网电压稳态和暂态过程进行分析。得出结论:永磁直驱风电场能够对输出的功率和无功功率进行控制,当风电并网系统输电线路中的电阻不能忽略时,风电场出口电压会产生正偏差。最后提出在直驱型风电场集中的地区建立一个以功率和无功功率为调控量、以维持电压稳定为目标的风电汇集线路电网电压自动控制系统的建议。

Study on Integration Simulation of D-PMSG Wind Power Farm

For studying impact on voltage of access point power grid of wind power integration, this paper takes D-PMSG wind power generator as study object and establishes D-PMSG simulation model on PSCAD/EMTDC simulation platform and proceeds equivalent modeling for wind power farm. By using BPA and PSCAD/EMTDC software, it establishes equivalent model for some area power grid in Fujian province and analyzes voltage stable state and transient process caused by large- scale wind power connection into areal power grid. It draws a conclusion that permanent magnetic direct drive wind power farm is able to control output power and reactive power. When resistance in transmission line of wind power integration sys- tem is not able to be ignored, there is to produce positive derivation exit voltage in wind power farm. At last, it proposes to establish voltage automatic control system for wind power assemble lines which is taking power and reactive power as regula- ting amount and keeping voltage stabile for target.