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为提高电力系统暂态稳定分析的可靠性,针对PSD-BPA暂态稳定程序中水轮机模型(TW卡)的输出无法吻合实测结果的问题,将该模型按照水轮机的传递系数结构图展开,经过比较分析,指出该水轮机模型中等于1的水轮机力矩对导叶开度的传递系数是其仿真结果偏离实际的原因所在,提出采用实测的水轮机力矩对导叶开度的传递函数代替该传递系数构成改进的水轮机模型,该模型仿真结果与实测结果吻合,仿真精度较TW卡显著提升,能够为电力系统暂态稳定分析提供更加贴近实际的机组仿真响应。
In order to improve the reliability of power system transient stability analysis, aiming at the problem that the output of turbine model (TW card) in PSD-BPA transient stability program can not meet the measured results, the model is developed according to the transmission coefficient structure chart of turbine. It is pointed out that the transfer coefficient of hydraulic turbine torque to the guide vane opening in this turbine model is deviated from the actual result. It is proposed that the transfer function of the measured turbine torque to the guide vane opening should be used instead of the transfer coefficient The simulation results of this model are in good agreement with the measured ones, and the simulation accuracy is significantly improved compared with that of the TW card, which can provide a more realistic simulation response of the unit for the transient stability analysis of the power system.