电力系统谐波对发电机的影响分析

Analysis of harmonic effects on generators in power systems

电力系统中的非线性负载日益增加,给电网带来了严重的谐波污染,影响发电机运行。基于此,建立发电机在谐波影响下的T型等效电路模型,针对该模型进行机端电压和定、转子电流波形分析;并研究发电机在谐波影响下的稳定电磁转矩和脉动电磁转矩,分析谐波对发电机的转矩危害;叙述谐波对发电机的其他影响,并通过实际发电机实验完成理论验证.

The ever-increasing nonlinear loads in power systems cause harmonic pollution to power grids,and have effects to generators operation.A T-type equivalent circuit model is established with the influence of generators harmonics considered in this paper.The voltage waveform,the stator current waveform and the rotor current waveform of the model are analyzed.And the stable electromagnetic torque and pulsating electromagnetic torque under the influence of generators harmonics are researched.The torque harmfulness of harmonic to generators is analyzed.Oher effects of harmonic on generators are also presented.Finally,generator experiments are carried out,results verify the proposed theory foundation.