电容补偿后的电动机软起动电网压降计算  

Calculation of net voltage drop during period of motor starting by means of compensation capacitor

作　　者：戴齐[1] 高越农[2] 李月英[2] 

机构地区：[1]杭州杭氧股份有限公司,浙江杭州310004 [2]天津市先导倍尔电气有限公司,天津300300

出　　处：《电气传动自动化》2010年第2期33-35,共3页Electric Drive Automation

摘　　要：在电网短路容量相对于电动机的起动容量偏小时,可以并接补偿电容减小电网的起动网压降。补偿电容的接入,增加了电网起动网压降的计算难度。推导了基于单位方向矢量和相关电力器件容量的简明计算起动网压降的公式,并演示了计算结果。导出公式的适用范围并不仅仅限于电动机起动。By means of electrical capacitor, the net voltage drop caused by motor starting can be decreased. This measure makes the task of calculating this drop complicated. In order to get the results effectively, some formulas based on unit vector and the volume of corresponding elements are deduced. The practical examples are shown as well. These formulas are also applied principally to other cases,in which the load is not a motor.

关 键 词：电网 起动网压降 计算公式 

分 类 号：TP31[自动化与计算机技术—计算机软件与理论]