摘要
常用的最大功率点跟踪(MPPT)方法,由于计算上的复杂性,实现时需要用到微控制器或DSP和相关的电路,成本太高,而对于小功率光伏系统,可以设计一个简单、实现成本低的最大功率点跟踪方法。本文提出了一种跟踪速度快、成本低的小功率MPPT方法,该方法用两条电压近似线(VALS)去近似最大功率点轨迹,产生模拟的MPPT电路,该方法具有结构简单、成本低、跟踪速度快、跟踪效率高的优点。为了验证所提出的方法,采用Power Simulation,搭建一个87W光伏系统的仿真模型,仿真结果表明该方法的有效性。
Because of the complexity of calculation,the commonly used maximum power point tracking(MPPT)method needs to use microcontroller or DSP and related circuits with high cost.For low-power photovoltaic system,a simple and low-cost maximum power point tracking method can be designed.This paper presents a low power MPPT method with fast tracking speed and low cost.This method uses two voltage approximation lines(VALS)to simulate the maximum power point trajectory and generates an analog MPPT circuit.This method has the advantages of simple structure,low cost,fast tracking speed and high tracking efficiency.In order to verify the proposed method,a simulation model of 87W photovoltaic system is built using Power Simulation.The simulation results show the effectiveness of the proposed method.
作者
江风云
李思齐
JIANG Feng-yun;LI Si-qi(College of Physical Science and Engineering,Yichun University,Yichun 336000,China;School of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan 430000,China)
出处
《宜春学院学报》
2019年第12期41-43,共3页
Journal of Yichun University
基金
江西省高等学校教学改革课题(JXJG-17-15-13))
江西省教育科学“十三五”规划课题(18YB221)
关键词
电压近似线
光伏
最大功率点跟踪
仿真
voltage approximation lines
photovoltaic
maximum power point tracking
simulation
