高压电动机的起动方案及设计

Starting Scheme and Design of High-Voltage Motor

介绍了高压电动机直接起动、电抗器降压起动与变压器配合起动的方案设计。作直接起动设计时,依据母线允许压降小于或等于15%和电机端电压的最低要求值直接进行计算;在不满足直接起动条件时,依据母线允许压降对降压电抗器或者专用供电变压器进行设计计算,给出了应用实例。综合各种起动方案,一般先考虑直接起动,再考虑电抗器降压起动与变压器配合起动,最后再考虑其他起动方案。

Introduction was made to the scheme design of direct start of high-voltage motor, reactor＇s step-down start and start with transformer. The design of direct start of high-voltage motor would be based on the motor＇s lowest terminal voltage value and the value of permissible voltage drop for generatrix which is not more than 15 percent. If the conditions of direct start were dissatisfying, the design would be based on the value of permissible voltage drop for generatrix or special power transformers. Some application examples were given. General speaking, direct start will be considered firstly, then reactor＇s step-down start and start with transformer will be reconsidered, and other starting methods will be the last ones to be considered.