An Improved Hill-Climbing Method for the Maximum Power Point Tracking in Photovoltaic System

Q1 Social Sciences HumanMachine Communication Journal Pub Date : 2010-04-24 DOI:10.1109/MVHI.2010.158
Chuanan Yao, Yongchang Yu
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引用次数: 11

Abstract

Considered as an abundant, pollution-free, renewable energy source, photovoltaic energy has an increased importance in electrical power supplies because of energy tension and low-carbon economy. In this paper the model of a photovoltaic array and its characteristics are analyzed. It is obvious that the output power of photovoltaic cells has nonlinear characteristics depending on solar irradiation levels and temperature. In order to continuously deliver the maximum power to the load under the changing conditions, it is necessary to track the maximum power point of the PV array. Therefore, a maximum power point tracking (MPPT) controller based on the improved hill-climbing is proposed in this paper. The controller based on microprocessor is used to implement the proposed MPPT algorithm, which gives a pulse width modulation (PWM) to drive the boost DC/DC converter in the photovoltaic system, and force the photovoltaic module to operate at the maximum power point. The obtained simulation results show the effectiveness of the proposed controller.
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光伏系统最大功率点跟踪的一种改进爬坡法
由于能源紧张和低碳经济,光伏能源作为一种丰富、无污染的可再生能源,在电力供应中的重要性日益增加。本文分析了光伏阵列的模型及其特性。很明显,光伏电池的输出功率随太阳辐照水平和温度的变化具有非线性特性。为了在变化的条件下持续向负载输送最大功率,有必要对光伏阵列的最大功率点进行跟踪。为此,本文提出了一种基于改进爬坡特性的最大功率点跟踪(MPPT)控制器。采用基于微处理器的控制器实现MPPT算法,通过脉冲宽度调制(PWM)驱动光伏系统中的升压DC/DC变换器,使光伏组件工作在最大功率点。仿真结果表明了所提控制器的有效性。
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来源期刊
CiteScore
10.00
自引率
0.00%
发文量
10
审稿时长
8 weeks
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