公开(公告)号：EP1016179A1

公开(公告)日：2000-07-05

申请号：EP98902371.8

申请日：1998-02-02

申请人： ABB AB

发明人： BERGGREN, Bertil ,  GERTMAR, Lars ,  NYGREN, Jan-Anders ,  PETERSSON, Tore ,  LEIJON, Mats

IPC分类号： H02H7/06

CPC分类号： H02P9/305 ,  H02H7/06 ,  Y10S174/19 ,  Y10S174/29

摘要： A synchronous machine for power and/or voltage control comprises a stator with a stator winding and a rotor with a field winding. The stator winding comprises a high-voltage cable with solid insulation. A rotor has a thermally based rotor current limit intersecting with a thermally based stator current limit in a capability graph at a power factor considerably below the rated power factor or has the thermally based rotor current limit above the thermally based stator current limit in the capability graph. Means are provided for limiting the currents in order to avoid thermal damage. In a method for power and/or voltage control of such a synchronous machine, the machine operates with the stator current exceeding the thermally based stator current limit for a certain time period less than the maximum permissible time limit, whereafter the overload is reduced by reduction of either the active power or the field current or a combination of both.

摘要翻译： 用于功率和/或电压控制的同步电机包括具有定子绕组的定子和具有励磁绕组的转子。 定子绕组包括具有固体绝缘的高压电缆。 转子具有基于热量的转子电流极限与功率因数下的基于热量的定子电流极限在功率因数下相交，该功率因数大大低于额定功率因数或具有基于热量的转子电流极限高于能力图中基于热量的定子电流极限 。 提供了限制电流的手段，以避免热损伤。 在用于这种同步电机的功率和/或电压控制的方法中，机器以超过基于热量的定子电流极限的定子电流工作一段时间，该时间小于最大允许时间限制，然后过载通过减少 有功功率或励磁电流或两者的组合。