同步调相机误同期条件下的电磁特性分析

Electromagnetic Characteristics of Synchronous Condenser under Fault-synchronization

同步调相机并网运行时,同步控制器的误操作或故障均会导致其误同期,从而产生较大的冲击电流和冲击转矩。为了研究误同期对同步调相机各电磁量的影响,本文建立了300Mvar同步调相机时步有限元场模型。通过对同步调相机机端电压和电网电压之间相角差为0°、45°、90°和180°时的并网合闸过程进行计算,研究了同步调相机定转子电流和电磁转矩随相角差的变化规律。分析了不同合闸角对同步调相机气隙磁密波形以及定转子铁芯饱和的影响。研究结果可为同步调相机的运行安全性提供技术支持。

When the synchronous condenser is paralleled to the grid,the mis-operation or failure of a synchronizing controller will cause its fault-synchronization,which will cause large impact current and impact torque.In order to study the influence of the fault-synchronization on the electromagnetic quantity of the synchronous condenser,a 300 Mvar time-stepping finite element field model of the synchronous condenser is established.Based on the calculation of the grid connected process when the phase angle difference between the synchronous condenser terminal voltage and the grid voltage is 0°,45°,90°and 180°,the varying laws of rotor current and electromagnetic torque are studied.The effects of different closing angles on the air gap magnetic density waveform of the synchronous condenser and the stator and rotor core saturation are analyzed.The research results can provide technical support for the operational safety of synchronous condenser.