基于模糊控制的光伏能量补偿研究与设计  

Research and Design on Photovoltaic Energy Compensation Based on Fuzzy Control

作　　者：付敏玲[1] 胡天友[1] 杨攀[1] 胡蓉[1] 

机构地区：[1]电子科技大学机械电子工程学院,四川成都611731

出　　处：《实验室研究与探索》2013年第12期27-30,共4页Research and Exploration In Laboratory

基　　金：国家自然科学基金项目(61106107);成都市科技攻关项目(11GGYB945GX-070)

摘　　要：针对光伏直流供电系统的能量变动性,提出了使用市电作为直流负载的能量补偿来源。为实现直流负载的供电稳定,在系统中加入了PWM整流器电路,实现光伏发电能量不足时,由市电补充能量;光伏发电能量过剩时,将多余的能量馈送电网。光伏电池始终工作于最大功率输出状态,由后端PWM整流器通过电压闭环实现负载的稳压控制和电流内环实现最大功率因数控制。通过对PWM整流器进行控制分析,在能量控制回路中采用了模糊智能PID控制,通过跟踪误差信号的状态来动态改变PID控制器参数,所以具有良好的自适应性和较强的鲁棒性。仿真结果表明,该模糊PID控制的PWM整流器可以实现光伏直流供电系统的稳定供电。According to the energy volatility of DC photovohaic power supply system, municipal grid as the sources of energy compensation for load is proposed. In order to achieve power supply for DC load stability, the PWM rectifier circuit is joined in the system, when photovohaic energy is shortage, the grid is added energy for load; when photow）ltaic energy more than the load needed, the excess energy feeds to grid. Photovohaic cells always work in maximum power point, in the back-end PWM rectifier. The load voltage stability is stabilized by voltage closed loop, and maximum power factor is achieved by current inner loop. After analyzing the PWM rectifier control, fuzzy intelligent PID （.ontrol is adopted in power control loop. The PID controller parameters are dynamically changed hased on the tracking error signal. Simulation results show that the fuzzy PID control of PWM rectifier DC power supply can t）e achieved photovuhaic power system stability.

关 键 词：光伏电池 能量补偿 模糊控制 整流器 

分 类 号：TM615[电气工程—电力系统及自动化]