过励 meaning in English
[电工] overexcite
Examples
- At present , differential protection is often used as the main protection for traction transformers . however , the existing of certain factors , such as magnetizing inrush , over - excitation , ct saturation and mismatching of ct ratio , will result in that it is hard to distinguish state current and fault current , and differential protection misoperation or maloperation , then secure operation of electric railways system will be threatened
目前，牵引变压器通常采用差动保护作为主保护，但是在某些因数的影响下差动保护并不能准确的区分牵引变压器内部故障或非内部故障，如故障电流与变压器处于励磁涌流、过励磁， ct饱和及ct变比不匹配等情况下的状态电流就很难准确的区分，可能造成保护误动或拒动，从而危及整个铁道电气化系统的安全运行。 - In accordance with the driving characteristics of ac driving locomotive , the working status of its traction transformer is analysed . the questions that should be considered in the traction transformer design of ac driving locomotive are mentioned . these questions are the large short - circuit impedance of traction winding , higher harmonic current , over - excitation and dc magnetization caused by large variation of the network voltage , etc . some disposal methods are given
针对交流传动电力机车的传动特点，对其中的牵引变压器的工作状态进行了分析，指出交流传动电力机车用牵引变压器设计时需考虑的牵引绕组的短路阻抗大、电流的高次谐波、网压波动大可能引起的过励磁以及直流磁化等问题，同时给出了相应的一些解决方法。