计及动态负荷时断续供电节能技术中电源快速软投入控制策略  

Control Strategy of Rapid Soft-switching in Intermittent Power Supply Energy Saving Technology With Dynamic Load Conditions Considered

作　　者：王义龙[1] 赵海森[1] 王泽忠[1] 詹阳[1] 许国瑞[1] 崔学深[1] WANG Yilong;ZHAO Haisen;WANG Zezhong;ZHAN Yang;XU Guorui;CUI Xueshen(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources（North China Electric Power University）,Changping District,Beijing 102206,China)

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学)

出　　处：《中国电机工程学报》2018年第18期5590-5598,共9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(2017XS021)~~

摘　　要：游梁式抽油机电机系统断续供电节能控制技术中,要求断电运行结束时电源能够在不产生较大冲击电流前提下快速完成全波投入,这与常规软投入控制相比区别在于电源投入控制过程中需要考虑负载转矩和转速的动态变化。为了解决这一问题,提出一种可计及负载动态变化的快速软投入控制策略。首先依据不同转速进行电源投入时的冲击电流特点以及负载转矩动态特性确定最佳电源投入时刻;进一步在合理限制投入初始时刻电流前提下,以全波投入时产生可满足负载需求转矩为目的,制定电源软投入触发角选择方法及控制策略,最终实现在有效限制冲击电流的同时,电机产生与负载相匹配的转矩。将文中所提的控制策略应用于油田现场,并以一台37kW抽油机电机为例,实测不同投入方式时的冲击电流波形,验证其正确性及有效性。As the energy saving technology of intermittent supply is used in the beam pumping motor systems, it is demanded that the supply should be rapidly re-switched on after power-off control, without large inrush current. In comparison to the conventional soft starting, the dynamic load torque and the varying motor speed should be considered particularly. To solve this problem, a rapid soft re-switching control strategy was proposed, which can take into account the dynamic load conditions. Firstly, the optimal re-switching time was determined according to the characteristics of inrush current with the different speed and load torque conditions; and the firing angle selection method and the related control strategy for supply re-switching were proposed under the preconditions of reasonable inrush current at the initial moment, as well as, meeting the load when switching to fully sinusoidal supply. With the proposed control strategy, the electromagnetic torque can match the load-torque requirement with restricted inrush current during the re-switching process. An energy saving controller was developed based on the proposed control strategy, and the experimental validation was performed on a 37kW beam pumping motor in an oil field. By comparing the measured inrush currents under different re-switching strategies, the correctness and the effectiveness of the proposed control strategy were verified.

关 键 词：断续供电 感应电机 快速软投入 节能 

分 类 号：TM343[电气工程—电机]