发电机组转子转动惯量获取方法研究

Research on Method of Obtaining Rotor Inertia of Generator Unit

针对发电机甩不同负荷所获得的发电机组转子转动惯量差别大问题,根据发电机组转子转动过程中能量转换特性,提出了一种转子转动惯量改进算法,并给出相应的转子转动过程能量转换平衡方程。将该方程应用于发电机组转子转动惯量计算,结果表明提出的改进算法由于考虑了机组甩负荷过程中的阻力影响,大大提高了转子转动惯量的精度,从而确保了发电机动能参数的准确性。

Aiming at problem of big differences among rotor inertias of generator unit obtained by different generator loadrejections,and according to energy conversion characteristics during the rotor rotation process of generator unit,a modified rotor inertia algorithm is proposed,and the corresponding energy conversion equilibrium equation in the rotor rotation process are given.The equation is applied in the calculation of rotor inertia of generator unit,and results show that because the proposed algorithm improves greatly the precision of rotor inertia,because it considers the influence of resistance during the generator load-rejection process,and thus the accuracy of kinetic energy parameters is guaranteed.