A modified Perturb & Observe MPPT technique to tackle steady state and rapidly varying atmospheric conditions

被引:62
作者
Devi, V. Kamala [1 ]
Premkumar, K. [1 ]
Beevi, A. Bisharathu [2 ]
Ramaiyer, S. [2 ]
机构
[1] Agcy Nonconvent Energy & Rural Technol ANERT, Trivandrum 695033, Kerala, India
[2] Coll Engn, Trivandrum, Kerala, India
关键词
Solar energy; Photovoltaic; P & O; MPPT; P-V curve; POWER POINT TRACKING; ADAPTIVE PERTURB; PV SYSTEM; ALGORITHM; ENERGY; COST;
D O I
10.1016/j.solener.2017.08.059
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
A comparison between two methods of maximum power point tracking for Solar Photovoltaic (PV) is attempted here. A modified method is proposed and evaluated. Perturb & Observe (P & O) method is selected for analysis as this method requires reduced implementation cost with better performance output. A Modified P & 0 method using directional step size is suggested here that can effectively tackle steady state variations around maximum power point and dynamic variations in environmental conditions of temperature and solar radiation. This is achieved by determining a step size that switches to 'zero' during the above conditions. Thus, the proposed method provides a stable PV voltage. The proposed method is evaluated for performance against the "Hill Climbing" P & O method by using the Ropp, Daily Profile, Irradiance-Temperature and Sunny Day tests. The average efficiency improvement was found to be in the range of 1-1.1% under ideal conditions.
引用
收藏
页码:419 / 426
页数:8
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