抽油机电动机起动及运行特性时步有限元分析  

Time-step FEM Analysis of Start and Operational Characteristics of Beam Pump Motors

作　　者：罗炜[1] 赵海森 王博 王义龙 

机构地区：[1]浙江大学数学系,浙江省杭州市310027 [2]新能源电力系统国家重点实验室(华北电力大学),北京市昌平区102206

出　　处：《中国电机工程学报》2014年第27期4691-4698,共8页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51307050);中央高校基本科研业务费专项资金资助~~

摘　　要：抽油机电动机的负载始终处于动态变化中,其起动及运行性能的影响因素繁多,经典方法很难得到满意结果。该文从麦克斯韦方程基本物理定律出发,对电动机定转子各电磁量正方向进行了统一规定,建立用于起动及正常运行特性分析的时步有限元模型。以油田常用的37 kW、8极感应电动机驱动的10型抽油机为实例,对比分析了抽油机动液面、平衡状况、电源电压等主要结构及运行参数对起动能力及运行性能的影响。实例计算表明:在抽油机动液面较小的情况下,通过对平衡量及电源电压的协调控制,系统节电率可达到15%。通过与实测数据对比验证了有限元分析结果的正确性。文中研究成果为油田电机系统节能潜力分析及节能新技术开发提供了新的技术基础。It is rather complex to analyze the start and operational process of a beam pump motor by traditional methods because of the dynamic potential load. This paper established a time step finite element model （FEM） to analyze the start and operation characteristics, based on Maxwell equations and a unified coordinate system for stator and rotor time varying electromagnetic quantities. With an example of a commonly used type 10 beam pump driven by a 37 kW 8 pole induction motor, we analyzed the influences of structural and operational parameters, including the dynamic liquid level, balance adjustment and power voltage. It is shown that, for beam pumps with a low dynamic liquid level, the energy saving rate can reach 15% when the balance adjustment and voltage regulating is controlled coordinately. The FEM simulation results are verified by test data. Results of the paper provide technical support for analyzing energy saving potential and developing new energy saving technologies in oilfield motor systems.

关 键 词：抽油机电动机 势能负载 时步有限元 起动特性 节能 

分 类 号：TM343[电气工程—电机]