发电机的不对称运行研究

发电机的不对称运行也是属于非正常工作状态。在实际运行中,引起发电机不对称运行的原因可能是多种多样的,如不对称负荷(电气机车、电炉等)、输电线路不对称(低压网中采用的"两线一地"接线方式)以及非全相运行状态等。当同步发电机不对称运行时,由对称分量法可知,定子绕组中除了有正序电流外,还有负序电流。所以,发电机三相不对称运行的特点就是伴随着出现负序电流。

Research on the Generator's Non-symmetric Operation

The generator＇s non-asymmetric operation belongs to normal working situation.In actual operation,the reasons that causing generators＇ non-asymmetric operation are diverse,such as asymmetric load（electric locomotives,electric furnace,etc.）,transmission line asymmetry（the use of low-voltage network of the ＂two lines one place,＂ connection）and non-phase running status.When the synchronous generator runs in asymmetry situation,known by the symmetry,there is positive sequence current as well as negative sequence current in the stator windings.Therefore,the operational characteristics of asymmetric three-phase generator are accompanied by the negative sequence current.