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大容量电动机降压启动压降计算及分析

来源于: 发表时间:2018-07-09 14:07 编辑:fzy

邹 颖(湖北工业大学,武汉市 430068)

邹威雄(深圳迪远工程审图有限公司,广东省深圳市 518027)
Calculation and Analysis of Voltage Drop of High-capacity Motors While Reduced Voltage Starting
ZOU Ying(Hubei University of Technology,Wuhan 430068,China)
ZOU Weixiong(Shenzhen Diyuan Engineering Consulting Co.,Ltd.,Shenzhen 518027,Guangdong Province,China)
 
    Abstract:Combined with the practical project,the calculation and analysis of the voltage drop of a 699 kW motor of a high-capacity water chilling unit (of which one 1 250 kVA transformer corresponds to one centrifugal water chilling unit with 1 100 ton of refrigeration(RT)and its supporting facilities,such as freezing pump,cooling pump and cooling tower fan)with 0. 38 kV low voltage and Y / △ reduced voltage starting is discussed emphatically to verify that whether the voltage variation on the substation busbars can meet the requirements of design specifications.
    Key words:frequent start;Y / △ reduced voltage starting;calculation of voltage drop;voltage fluctuation;preload;capacity of short circuit;equivalent circuit;relative voltage value
 
    摘 要:结合实际工程,重点讨论“其中一台变压器1 250 kVA对应一台1 100冷吨离心式水冷冷水机组及其配套冷冻泵、冷却泵、冷却塔风机”中大容量冷水机组电动机699 kW采用0. 38 kV低压配电、Y / △降压启动压降计算及分析,验证引起变电所母线上电压变动能否满足设计规范的要求。
    关键词:频繁启动;Y / △降压启动;压降计算;电压波动;预接负荷;短路容量;等效电路;电压相对值
    中图分类号:TU852              文献标识码:A
    doi:10. 3969 / j. issn. 1003 - 8493. 2018. 06. 006

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