基于单相感应电泵的光伏扬水系统开发  

DEVELOPMENT OF PHOTOVOLTAIC PUMPING SYSTEM BASED ON SINGLE-PHASE INDUCTION PUMP

作　　者：徐政[1] 李旭 陈锐坚 

机构地区：[1]清华大学深圳研究生院电力系统国家重点实验室深圳研究室,深圳518055 [2]深圳天源新能源股份有限公司,深圳518055

出　　处：《太阳能学报》2018年第2期529-535,共7页Acta Energiae Solaris Sinica

摘　　要：开发基于单相交流感应电泵的光伏扬水系统，采用常规的三相逆变电路，对单相感应电动机的主绕组和副绕组施加相位差为90°的PWM电压，实现对水泵宽范围的变频调速控制；提出新的母线箝位调制方法，提高直流母线电压利用率，减小电压与电流谐波，提高光伏扬水系统的运行效率；实验结果验证了所提控制方法的有效性和系统运行的稳定性。A photovoltaic pumping system based on a pump driven by a single-phase induction motor was developed. Two PWM voltages with phase difference of 90° were fed to the main and auxiliary windings of single phase induction motor by a normal three-phase inverter to realize the wide range of pump frequency control. A novel bus-cramp modulation method was proposed to raise utilization rate of DC-bus voltage, reduce voltage and current harmonics and improve the operating efficiency of photovohaic pumping systems. The experimental results validate the effectiveness of the control scheme and the stability of system operation.

关 键 词：光伏扬水系统 单相感应电动机 脉宽调制 直流母线电压利用率 母线箝位 

分 类 号：TM615[电气工程—电力系统及自动化]