PSASP/UPI在异步风机潮流计算及风电接纳能力研究中的应用

Application of PSASP/UPI in Asynchronous Wind Generator's Power Flow Calculation and the Analysis of Maximum Wind Power Penetration

根据异步风机的稳态潮流模型,在电力系统分析综合程序PSASP7.043中的用户程序接口(UPI)模块中,利用VC++6.0编写了异步风机的稳态潮流程序,通过动态链接库与PSASP连接,实现了含异步风机风电场的潮流计算;同时编写了用来研究静态电压稳定性及电力系统接纳风电能力的风电场P-V曲线的计算程序,实现了P-V曲线的快速求取。结果表明,在进行含异步风机风电场电力系统潮流计算时,风机内部功率损耗可以忽略不计,即风机输入的机械功率近似等于风机输出有功功率;通过P-V曲线的快速求取,可以快速地计算出电网中基于静态稳定下某一并网母线的风电穿透功率,从而节省了大量的计算时间,提高了计算准确度,为更深一步研究电网的风电接纳能力提供了依据。

On the basis of steady state model of asynchronous wind generator, the program of the steady state load flow model of asynchronous wind generator is programmed by VC ＋ ＋ 6. 0 on the platform of User Program Inter- face （UPI） module in Power System Analysis Software Package （PSASP7. 043 ）, and is connected to PSASP via dynamic-link library, which realize the load flow calculation of the wind farm containing asynchronous wind genera- tors. The program of plotting a P-V curve which is used to analyze the static voltage stability of the wind farm is pro- grammed, and the rapid plotting of a P-V curve is realized. The research results indicate that, when calculating load flow of the wind farm containing asynchronous wind generators, the losses inside the wind generators can be ig- nored, that is, wind generator＇ s input power can be approximately equal to its output active power. Still, the wind farm＇ s maximum capacity of one bus in the power system based on static stability can be quickly calculated by the rapid plotting of P-V curve, which save much time and improve the precision of the calculation, and provide basis for the further research of capacity of power system on acceptance of wind power.