电压暂降中相位因素对异步电机运行性能的影响

发布时间：2018-01-15 06:05

  本文关键词：电压暂降中相位因素对异步电机运行性能的影响　出处：《电机与控制应用》2016年11期 　论文类型：期刊论文

  更多相关文章： 电压暂降 相位跳变 暂降起始点 异步电机

【摘要】：电压暂降问题严重影响异步电机的安全稳定运行,已成为备受关注的电能质量问题。为了获得电压暂降相位因素(相位跳变与暂降起始点)对电机运行性能的影响规律,建立了能够模拟电压暂降的电机仿真模型,以5.5 k W、55 k W和135 k W三种电机为例,系统地研究了电压暂降中的相位跳变与暂降起始点对定子电流峰值、转矩峰值、转速及临界清除时间的影响。结果表明,当暂降过程中计及相位跳变因素时,定子电流与转矩峰值显著增加,转速跌落更加严重且临界清除时间相对缩短;但暂降起始点对上述性能指标影响较小。以5.5 k W电机为例进行了仿真试验对比,验证了分析结果的正确性。
[Abstract]:Voltage sag seriously affects the safe and stable operation of asynchronous motor. In order to obtain the effect of phase factor (phase jump and initial point) of voltage sag on the performance of motor, it has become a concerned problem of power quality. The simulation model of the motor which can simulate voltage sag is established. Taking 5.5 kW 55kW and 135kW for example. The effects of phase jump and initial point of voltage sag on stator current peak, torque peak, rotational speed and critical clearance time are systematically studied. The results show that the phase jump factor is taken into account in the process of voltage sag. The peak value of stator current and torque is significantly increased, the speed drop is more serious and the critical clearance time is relatively shorter. However, the initial point of the sags has little effect on the above performance indexes. The simulation results of 5.5 kW motor are compared to verify the correctness of the analysis results.
【作者单位】： 辽宁轨道交通职业学院;
【分类号】：TM343
【正文快照】： 0引言 在众多电能质量问题中,电压暂降是最严重的电能质量问题之一[1]。IEEE标准将其定义为电压幅值下降到额定值的10%~90%,暂降持续时间为0.5个周波到1 min[2]。异步电机作为工业生产中广泛应用的设备,电压暂降对其影响主要体现在两方面:一是产生较大的冲击电流和冲击转矩,，

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