计及谐波影响的双笼异步电机回路电磁参数计算

Calculation of Electromagnetic Parameters of Double-cage Asynchronous Motors under Influence of Harmonics

应用多回路理论进行双笼异步电机内部故障暂态仿真及保护方案设计、校验时,确定电机回路的电磁参数是一个关键内容。推导了计及谐波影响时,定子回路、转子回路电磁参数的计算公式,最后结合电机实际参数,仿真分析气隙磁场谐波次数对各电磁参数影响,并从工程实际应用出发,确定了合理的谐波计算次数。

While the theory of multiple-loop was applied into transient emulation and designing or checking protection scheme of internal faults of double-cage induction motors, the calculation of electromagnetic parameter of motor was considered as a key content. The electromagnetic parameters equations of stator loop and rotor loop under influence of harmonics were deduced. Combining with actual parameters of motors, the influence of harmonic order on electromagnetic parameters was emulated and the resonable harmonic order for calcula-ting was determined based on the actual engineering applic-ation.