交流调速电梯中的电能质量

Power Quality Inadjustable Elevator Ac Drives

为人们越来越多地使用非线性负载,电网中就存在电源质量问题。在交流传动系统中广泛使用功率变换器,由于其非线性的工作运行状态,导致电压发生畸变,从而影响敏感设备的性能。本文试图分析由功率变换器供电的电梯交流传动系统对电源质量的影响。敏感电气设备和电梯交流传动系统都连接到0.4kV输电线路上。因功率逆变器导致的电压畸变能够导致系统故障甚至电气设备中部分元件的损坏。

Power quality problems exist today because of increasing usage of non-linear loads.Static power converters are widely used in adjustable AC drives. Due to their non-linear operations they cause voltage distortion that may effect the performance of sensitive loads. This study has the aim to analyze influence of adjustable elevator AC drives fed by static power converters on power quality. Sensitive electronic equipment and these elevator AC drives are connected to the same 0.4 kV feeders. Voltage distortion caused by power converters can cause a malfunction and even a component failure of this electronic equipment.