Effect Analysis of Load Characteristic on Operation Stability of Hydropower Stations

Abstract With the requirement of renewable clean energy and low-carbon society, hydroelectric engineering has gained rapid development in China. To ensure the stable and reliable operation of hydropower stations, the effect of electric loads with different characteristic should be further analyzed. Based on the mathematical model of hydraulic system and mechanical system, the load models with different characteristic are introduced and the numerical analytical model with state equations is built. Then, the effect of load characteristic on operation stability is investigated in detail. For a built single-unit and single-pipe hydropower station running with static load or dynamic load, the obtained solution and dynamic curves is identical with that of experimental research. Moreover, the effect of load characteristic is further studied for different static loads with another given case. The results indicate that, electric loads with different characteristic obviously have different impact on operation stability, and regulation performance of unit running with dynamic load is superior to that of static loads with different characteristic.