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access icon free Quick and oscillation free peak power estimation using SEHC algorithm for single-sensor-based PV-fed battery charging

© The Institution of Engineering and Technology
Received 20/01/2017, Accepted 11/10/2017, Revised 27/09/2017, Published 16/10/2017

This study deals with a new version of hill-climbing (HC) algorithm for maximum power peak estimation of the solar photovoltaic (PV) panel, which has self-estimation (SEn) and decision-taking ability. Moreover, it is based on a single sensor, which is applicable for the PV array-fed battery charging. The working principle of Self-Estimated HC (SEHC) algorithm is based on three consecutive operating points on the power-current characteristic. By using perpendicular line analogy (PLA), these points decide direction, and an optimised operating position for next iteration, which is responsible for quick maximum power point tracking as well as improved dynamic performance. Moreover, in every new iteration, the step size is reduced by 90% from the previous step size, which provides an oscillation-free steady-state performance. Owing to a single sensor, the computational burden, as well as calculation complexity of the SEHC algorithm is less, so it can be simply implemented on a cheaper microcontroller. The effectiveness of the proposed technique is validated by MATLAB simulation as well as tested on the experimental prototype. Moreover, the performance of SEHC algorithm is compared with recent state-of-the-art techniques. The highly suitable and satisfactory results of SEHC algorithm show the superiority over the state-of-the-art methods.

Inspec keywords: maximum power point trackers; decision making; solar cells; secondary cells

Other keywords: single-sensor-based PV-fed battery charging; perpendicular line analogy; self-estimated HC; maximum power peak estimation; decision-taking ability; microcontroller; dynamic analysis; PV array-fed battery charging; oscillation free peak power estimation; MATLAB simulation; PLA; PV panel; hill climbing algorithm; solar photovoltaic panel; power-current characteristic; oscillation-free steady-state performance; SEHC algorithm; HC algorithm; maximum power point tracking

Subjects: Photoelectric conversion; solar cells and arrays; Secondary cells; DC-DC power convertors; Secondary cells; Solar cells and arrays; Power electronics, supply and supervisory circuits

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