东北农村户用型光伏系统控制策略

Control Strategy of Photovoltaic System in the Northeast Rural Household

东北农村地区冬天采暖消耗能源较大,为节能减排,设计一种光伏发电加热策略。该策略利用太阳能供电给远红外加热装置来满足农户的供暖要求,采用扰动占空比的方法控制降压升压变换装置,根据光照和温度的变化完成最大功率跟踪。在用户不需要光伏加热的季节,结合无差拍并网逆变器将尽可能多的太阳能以单位功率因数的方式并网。最后利用仿真验证了控制策略的正确性和可行性。

The consumption of energy for heating is huge in northeast rural areas in winter. A photovoltaic heating strategy is proposed for energy conservation.The strategy uses solar energy and far infrared heating device to satisfy the requirement of farmer household heating. It controls the buck-booster transform device by means of perturbation duty ratio method to achieve maximum power point tracking according to the change of light and temperature, In other seasons, solar power is transmitted to grid with unit power factor by means of dead beat grid-connected inverter. Finally the validity and feasibility of proposed control strategy are verified by simulation results.