体现轧机功率需求主动性的周期性冲击负荷模型

冲击负荷是引起电力系统功率振荡的重要因素之一。基于电网功率振荡研究的需要，建立了一种能体现轧机功率需求主动性的周期性冲击负荷模型。该模型将异步电机动态模型与轧机实际运行时功率需求的变化规律相结合，在异步电机负载转矩上叠加一个反映轧机负载变化的外部转矩来模拟冲击负荷的主动性和冲击性。利用PSASP用户自定义建模功能，实现...

A Periodic Shock Load Model Incarnating Power Demand Initiative of Rolling Mill

Shock load is one of the important factors causing power oscillation.To meet the requirement in the research on power oscillation occurred in power system,a periodic shock load model that can incarnate the power demand initiative of rolling mill is built.In the built model,the dynamic model of asynchronous machine is combined with variation law of rolling mill’s power demand during its actual operation,therefore an external torque that reflects the load change of rolling mill is superposed onto the load torque of asynchronous machine to simulate the initiative of shock load and the shock caused by load.Using the user-defined modeling function of Power System Analysis Software Package(PSASP),a new shock load model of rolling mill is achieved.By means of comparing the data from simulation with actual measured data of rolling mill,it is proved that the built model can be used to research the power oscillation of power system due to shock load.