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针对抽水蓄能过水系统精细化建模问题,利用电路等效法推导了包含有压管道、调压室和水泵水轮机的抽水蓄能机组过水系统等效电路模型,然后运用多维基尔霍夫电压和电流定理,建立了整个过水系统电路拓扑结构的常微分矩阵方程,研究了基于电路等效法的抽水蓄能水机电联合仿真模型的仿真算法流程。针对洪屏抽水蓄能电站甩全负荷工况进行仿真,并对比电路等效法与特征线法得到的仿真结果。仿真试验结果表明,电路等效法准确、有效,相较于传统特征线法具有更好的稳定性和适应性。研究成果为抽水蓄能机组过水系统计算提供了新思路。
In order to solve the problem of the modeling of the pumped storage system, the equivalent circuit model of the pumped storage unit containing the pressure pipe, the surge chamber and the pump turbine is deduced by the equivalent circuit method. Then, Voltage and current theorem, an ordinary differential matrix equation of the topology of the whole water system circuit is established. The simulation algorithm flow of the pumped storage electromechanical simulation model based on circuit equivalent method is studied. Aiming at Hongping Pumped Storage Power Station, the full-load rejection condition is simulated, and the simulation results of circuit equivalent method and characteristic line method are compared. Simulation results show that the circuit equivalent method is accurate and effective, and has better stability and adaptability than the traditional characteristic line method. The research results provide a new idea for the calculation of water-passing system of pumped storage units.