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鉴于以往研究侧重于水电机组原动机模型开发,较少研究模型的适应性,且缺乏在电力系统仿真中选取模型的指导性建议与方法,提出模型选取原则,通过仿真水轮机模型、水击模型与调压室—分叉管模型的动态行为,分析水击模型的稳定域,从而归纳出模型的适用条件。结果表明,解析非线性模型与理想模型适合于描述水斗式水轮机,混流式水轮机宜使用传递系数模型;可依据Tw/Tr和Tf/Tr的值选取刚性水击模型与降阶弹性水击模型;当仿真时间较长时需要采用调压室—分叉管的模型。
In view of the past research focuses on the development of the prime mover model of hydropower units, less study on the adaptability of the model, and lack of guidance suggestion and method for choosing the model in the power system simulation, the principle of model selection is put forward. By simulating the turbine model, The dynamic behavior of the surge chamber-furcation pipe model, and the stability of the water hammer model were analyzed, and the applicable conditions of the model were summarized. The results show that the analytical nonlinear model and the ideal model are suitable for the description of the bucket-type turbine, Francis turbine should use the transfer coefficient model; can be selected according to the value of Tw / Tr and Tf / Tr rigid water hammer model and the elastic deformation model ; When the simulation time is longer need to use the pressure regulating chamber - the model of the furcation tube.