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.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2018年第2期529-535,共7页
Acta Energiae Solaris Sinica
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
photovoltaic pumping system
single-phase induction motor
pulse width modulation
utilization of DC bus voltage
bus-cramp
作者简介
通信作者：徐政（1960-），男，博士、副教授，主要从事电力电子技术、光伏发电技术研究和产品开发等方面的研究。xuz@sz．tsinghua．edu．cn
