摘要
在光伏与市电并联直流供电系统中,为最大限度利用太阳能,需要实时做到最大功率点跟踪(MPPT),因此有必要制定合理的能量管理控制策略,对系统的能量流动进行高效控制。现提出通过改变移相全桥控制信号之间的相位,以实现占空比的变化,使得负载的等效电阻实时跟踪光伏阵列的等效内阻,从而实现MPPT;采用固定开关频率的脉宽调制(PWM)直接电流法对PWM整流器的稳压进行控制,从而实现能量解耦的控制策略。对系统进行了仿真和实验,其结果验证了系统的结构设计和控制策略的正确性、有效性。
In photovoltaic and commercial power supply parallel systems, in order to maximize use of photovohaic energy,it needs to achieve maximum power point tracking （MPPT） in real time, so it is necessary to develop a reasonable strategy for energy management control systems for efficient energy flow control.Now put forward by changing the phase-shifted full-bridge control between phase of the signal duty cycle to achieve change, making the equivalent resistive load time tracking photovohaic array equivalent resistance in order to achieve MPPT.Fixed switching frequency PWM direct current method is adopted for pulse width modulation（PWM） rectifier regulator control.The experimental results verify the correctness and effectiveness of structural design and control strategy of the system.
出处
《电力电子技术》
CSCD
北大核心
2015年第6期91-93,共3页
Power Electronics
基金
国家自然科学基金(611061107)~~
关键词
控制策略
整流器
最大功率点跟踪
parallel power supply
converter
rectifier
countercurrent
