污水源热泵机组启动方式探讨

Discussion on Starting Mode of Sewage Source Heat Pump Unit

通过对某一污水源热泵启动过程中断路器跳闸情况的研究,分析跳闸原因,发现开式星-三角降压启动方式在星形转三角形时二次冲击电流过大,提出采用闭式星-三角降压启动方式,减少在星形转三角形时的二次冲击电流,起到改善电网及减少设备危害的作用。

On the basis of research on breaker tripping during starting of one sewage source heat pump,tripping causes are analyzed,and then it is found that secondary impulse current is too high for open star-delta reduced voltage starting when the star starting is switched to the delta starting. This paper suggests the closed star-delta reduced voltage starting to reduce the secondary impulse current at switching,improve electric grid and relieve damages to equipment.