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。系统由光伏电池、市电、移相全桥变换器、PWM整流器组成。在光伏发电能量大于负载所需时,将多余的能量馈送电网;在光伏发电能量不足时,由市网补充。系统的核心是实现光伏、市电、负载三者之间的能量管理。文章首先对整个供电系统进行了分析,然后讨论了系统的不同工作模式,最后提出了市电的能量补偿控制策略。仿真和实验表明所提的系统结构和控制策略能够实现市电与光伏供电系统的稳定联合供电。
According to the energy volatility of dc photovoltaic power supply system, grid as the sources of energy compensation for load is proposed. It is composed of solar cells, grid, the phase shift- ing full bridge converter and PWM rectifier. When photovoltaic energy more than the load needed, the excess energy feed to grid, and when photovohaic energy shortage, the grid added energy for load. The key point of power management is to achieve energy management among photovohaic, grid and the load.This paper analyses the whole power system, then discusses different running condition of the sys- tem, and put forward the compensation control strategy. Simulation and experimental results show that the proposed system architecture and control strategy can achieve photovoltaic and grid hybrid power supply.
出处
《可再生能源》
CAS
北大核心
2013年第8期10-13,17,共5页
Renewable Energy Resources
基金
国家自然科学基金(61106107)
成都市科技攻关项目(11GGYB945GX-070)
关键词
光伏发电
PWM整流器
移相控制
能量管理
photovohaic generation
PWM rectifier
phase shift control
energy compensation
