摘要
最大功率点跟踪在光伏阵列工作时发挥着重要作用,针对目前采用的最大功率点跟踪算法均需要计算功率,提出了一种无电压传感器的改进型控制策略。该方法基于DC-DC变换器输入电流的控制,通过变步长调节实现占空比自寻优,使光伏阵列输出最大功率,算法实现过程不需要功率计算。最后通过仿真对该方法进行验证和测试,结果表明,该方法能准确实现最大功率跟踪,同时动态响应特性和稳定性也较好。
Maximum power point tracking (MPPT) plays an important role in PV array working. The power need be calcu- lated in available MPPT algorithms, therefore an improved control strategy without any voltage sensor is presented. The method, on the basis of the control of input current of DC-DC converter, realizes the self-optimization of duty cycle by means of step size varying, and makes the PV array output maximum power, by which the power needn't be calculated in algorithm realization pro- cess. The method was tested and verified with simulation. The simulation results show that the method can realize the maximum power tracking accurately, and has perfect dynamic response characteristic and stability.
出处
《现代电子技术》
北大核心
2017年第18期135-138,共4页
Modern Electronics Technique
基金
新疆维吾尔自治区高等学校科研计划项目(XJEDU2012I15)
国家自然科学基金(51467021)