摘要
针对由传感器带来的高成本、低稳定性等诸多缺点,提出一种无网侧电动势传感器的PWM可控整流控制策略。在对三相电网电动势方程分析的基础上,利用交流电流偏差调节法重构了网侧电动势的幅值和相角,建立了PWM可控整流的M atlab仿真模型验证理论的正确性。仿真结果表明,该系统能够迅速准确地辨识出电网电动势,并且能够以单位功率因数运行于整流和逆变,实现了能量的双向传输。
Aiming at solving the problems which sensors bring, such as high cost and low stability, a novel scheme of PWM controlled rectifiers eliminating the AC input sensors was proposed in this paper. Based on the mathematical analysis of the grid voltage equation, the AC power voltage was reconstructed by regulating the deviation between the rectifier current and the model current, and the simulink model in Maflab was established to verify the correction of the theories. The simulation result showed that the system identified the peak value and phase angle of the AC power voltage rapidly and precisely,and it also was operated in both rectification and inversion with a high power factor,which realized the current flow bi -directionary.
出处
《微特电机》
北大核心
2008年第12期1-3,7,共4页
Small & Special Electrical Machines
