Multi-peak photovoltaic array maximum power point tracking algorithm based on jump strategy

Abstract

The invention discloses a multi-peak photovoltaic array maximum power point tracking algorithm based on a jump strategy. When a photovoltaic array is evenly illuminated, a conductance increment method is adopted for maximum power tracking; when the photovoltaic array which is originally illuminated is partially shielded, maximum partial power points can be rapidly positioned through a constructed load line function on the basis of the conductance increment method, and therefore global maximum power point tracking is achieved. The tracking method is high in practicability, and is more obvious in superiority when the photovoltaic array is partially shielded. On the basis of the constructed load line function, the problem that traditional maximum power point tracking easily runs into local optimum is effectively solved, maximum power output is accurately achieved, and a new method is provided for multi-peak photovoltaic array maximum power point tracking.

Description

technical field [0001] The invention relates to a multi-peak photovoltaic array maximum power point tracking algorithm based on a jump strategy, and belongs to the technical field of photovoltaic array applications. Background technique [0002] Facing the increasingly serious energy crisis, solar energy is playing an increasingly important role as a renewable energy source. Photovoltaic power generation is one of the main ways to utilize solar energy at present, and its development and utilization have been continuously developed. In order to improve the photoelectric conversion efficiency of the photovoltaic power generation system, the photovoltaic module should be dynamically operated near the maximum power point, and a suitable MPPT algorithm (such as the conductance incremental method) should be matched to find the maximum power point. Ideally, it can be considered that each photovoltaic cell inside the photovoltaic module works in the same environment, and its output...

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Problems solved by technology

[0004] In order to solve the deficiencies of the prior art, the purpose of the present invention is to provide a method for tracking the maximum power point of a multi-peak photovoltaic array based on a jumping strategy, which solves the problem that the conventional MPPT algorithm under current local shadows will cause the system to fall into a local peak and cannot track the global The question of maximum power point

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