长引水系统水电站水力过渡过程仿真分析

Simulation analysis of hydraulic transient of hydropower station with long water transportation system

针对长引水系统水电站在负荷变化时的安全问题,以压力管道非恒定流微分方程和特征线法为基础,基于MATLAB平台中SIMULINK方法,建立了一管四机的长引水系统水电站数值仿真模型,并对木扎提水电站水力过渡过程进行了仿真模拟,确定了调压室最高、最低涌浪,机组最大转速上升率及蜗壳进口最大压力。结果表明:在不同机组组成的电站系统中,大机组是水力过渡过程中的控制因素。

In order to ensure the safety of the hydropower station with long water transportation system while load changing, based on unsteady flow differential equations of pressure and characteristic - line method, a pipeline a numerical simulation model of the water power station with one chamber and four hydraulic turbine sets is built with SIMULINK of MATLAB platform. With the numerical model, the simulations of the hydraulic transition process of Muzhati hydropower station are conducted. The high- est and the lowest surge, the rate of rise in maximum rotor speed of turbine set, the most pressure in spiral case inlet are calculated. The results show the large generator unit is a major gating factor dur- ing the hydraulic transient process in the complicated hydraulic station composed by different turbine sets.