Modified hill climbing MPPT algorithm with reduced steady-state oscillation and improved tracking efficiency

The Journal of Engineering

Weiwei Zhu¹  Pengwei Li²  Liqun Shang³  Hangchen Guo⁴ 

[1] College of Electrical and Control Engineering, Xi'an 710054 , People'an University of Science and Technology , Xi's Republic of China

关键词: maximum power point tracking control program;    boundary conditions;    dynamic response speed;    adaptive hill climbing method;    photovoltaic system;    PV system;    steady-state tracking accuracy;    MPPT algorithm;    PV power generation;    irradiance step change;    steady-state oscillations;   

DOI  :  10.1049/joe.2018.8337

学科分类：工程和技术（综合）

来源: IET

【 摘 要 】

To ensure the photovoltaic (PV) system can still output maximum power under changing environmental conditions, a modified hill climbing algorithm is proposed. The algorithm uses a variable step-size strategy to reduce the steady-state oscillations and prevent operating point from diverging away from the maximum power point by introducing boundary conditions. To verify its effectiveness, the proposed algorithm is compared with the conventional and adaptive hill climbing method under the environmental condition of irradiance step change and gradual change. The simulation results show that the proposed algorithm can increase the dynamic response speed of the PV system by 75% under varying irradiance, and can achieve a steady-state tracking accuracy of 99.8%. Besides, the proposed algorithm only needs to embed several lines of additional programs in the conventional hill climbing maximum power point tracking (MPPT) control program and does not require additional hardware components, which reduces the cost of PV power generation.

【 授权许可】

CC BY