Due to various reasons,hydroelectric units may enter isolated grid operation mode,ensuring the stability of isolated grid operation is an important prerequisite for ensuring power supply and accelerating grid recovery.In order to effectively carry out research on the regulation characteristics and control strategies of the impulse turbine speed regulation system,this paper establishes a mathematical model for the analysis of the governing system for impulse hydroelectric units.The regulation characteristics of impulse hydroelectric units under small load disturbance and large load disturbance in isolated grid are simulated.The effect of different switching strategies of the deflector is verified through sudden load rejection simulation,and on-site experiments on the isolated grid regulation of impulse hydroelectric units are carried out.The correctness of the mathematical model described in this article has been verified,and appropriate frequency settings for the deflector switch on or switch off,as well as reasonable control parameters for the governor,are important guarantees for ensuring the stability of isolated grid operation.
维普
万方数据