大容量异步电动机的短路反馈电流

THE SHORT-CIRCUIT FEEDBACK CURRENT OF LARGE CAPACITY OF ASYNCHRONOUS ELECTRICAL MOTOR

随着电力技术的发展，火电机组的单机容量不断增大，使厂用辅机的异步电动机容量随之增大．大容量异步电动机与小容量异步电动机相比，它们的R,X,T等参数都有较大的差异，而且这种差异随着容量的增大而愈显著，使其供给的短路电流初值的大小和在暂态过程中的变化规律都不同．本文对大、小容量异步电动机短路反馈电流的特点作了详细比较，并对大容量异步电动机的短路电流计算作了全面阐述．

With the development of electrical technology, the capacity of single electrical motor in heat-engine plant expands constantly. Along with it, the capacity of the assist motor used in heat-engine plant expands too. Compared with the small capacity asynchronous electrical motor, the value of R. X,TD in the large capacity asynchronous electrical motor are rather different, and the capacity is larger the difference is more obvious. So that the initial value and the change law in suspended state of the short -circuit current that provided by the large and the small asynchronous electrical motors are different.The charaters of the feedback short-circuit current that provided by the laree and the small asynchronous electrical motors are be compared in detail, and the calculation of the short-cirsuit current provided by the large asynchronous is discussed fully in this paper.