降压起动控制方式对大型电动机的影响  

Influences of Control Mode of Reduced Voltage Starting on High-capacity Motor

作　　者：白波 周亚强 李存 Bai Bo;Zhou Yaqiang;Li Cun(Baotou Steel Yingda Gas Co.,Ltd.,Baotou 014010,Inner Mongolia Autonomous Region,China;CSP Plant of Inner Mongolia Baotou Steel Union Co.,Ltd.,Baotou 014010,Inner Mongolia Autonomous Region,China)

机构地区：[1]包头包钢盈达气体有限公司,内蒙古包头014010 [2]内蒙古包钢钢联股份有限公司薄板坯连铸连轧厂,内蒙古包头014010

出　　处：《包钢科技》2025年第2期77-79,84,共4页Science & Technology of Baotou Steel

摘　　要：随着空分设备的大型化,空压机、增压机、氧压机等配套的电机容量也随之增加。空压机电机容量发展到2万kW以上,电机的大型化给电机控制、起动和电网带来前所未有的挑战。大型电机起动过程特别复杂,一方面要考虑对电网的影响,同时还要考虑对电机和起动设备的冲击。行业内根据条件和需求采用各种启动方式,文章论述的自耦变压器降压是其中一种成熟的降压起动技术。自耦变压器对电网冲击小、操作简单、性能稳定,在空分行业得到广泛应用,但自耦变压器降压起动控制方式选择不当,也会给电机造成一定的损伤,文章通过案例对自耦变压器起动控制做了研究和分析。With the scaling up of air separation equipment,the capacities of supporting motors for air compressor,supercharger and oxygen reciprocating compressor are also increased.The capacity of motor for air compressor is developed to over 20,000 kW and scaling up of motor has brought unprecedented challenges for control and starting of motor and power grid.The start-up process of high-capacity motor is particularly complicated.On the one hand,the influences on power grid should be considered,on the other hand,the impact on motor and starting equipment should also be considered.Various starting modes are adopted based on conditions and demands in the industry,the reduction voltage with auto transformer discussed in the paper is one of mature reduced voltage starting technologies.The impact of auto transformer on power grid is low as well as it is with simple operation and stable performances,so it is widely used in the air separation industry.If the control mode of reduced voltage starting for auto transformer is selected improperly,it will cause certain damages to motor.The start control of auto transformer is studied and analyzed through cases in the paper.

关 键 词：降压起动 重合闸 失电残压 

分 类 号：TM-307[电气工程] TM-401