电动机起动时电网压降计算与分析

Calculation and Analysis of Voltage Drop of Electric Network

针对工程应用上使用的多种软起动装置,介绍了高压鼠笼型(同步)大功率电动机使用软起装置或直接起动时电网电压降的三种计算方法,并以计算实例的对比得出在电网容量有限的情况下使用液态电阻软起动装置是最有效和最实用的结论。

In the light of a great variety of soft starting devices used for engineering, the three calculation methods for voltage drop of electric network were presented. The three calculation methods were used when the squirrel cage type （synchronous） high power motor of high voltage applied calculation examples a soft starting device or a direct starting method. Comparison results of showed that using the soft starting device of liquid resistance was most effective and practical as the electric network catpacity was limited