从电机系统节能看独立变压器供电的能量损失

超大型电机直接全压起动时起动电流很大,会引起大的电网电压波动,影响同电网其它设备的正常运行.当前在工程实践上多采用超大型电机设立独立变压器供电的方式来隔离其影响.但独立变压器方式仅解决了电机起动时电网电压波动问题.并且从电机系统节能的角度看,独立变压器供电方式是不经济的.开关变压器式高压电机软起动装置可以解决超大型电机的软起动难题,同独立变压器方式相比较,还能节约大量电能.

Discussion about Energy Loss of Dedicated Transformer for Large Capacity Motor

Large capacity motor starting directly on line will cause high over-current on power system and bring down system voltage to such low level that other motors will run unexpectedly.A common way to solve this problem is to use a dedicated transformer for the motor.But in this way it will lose lots of energy.Switching transformer soft-starter can speed up motor smoothly,solve motor starting problem and consume less energy than the dedicated transformer.