Valley delimitation searching method for tracking multi-peak maximum power point of photovoltaic power system

A photovoltaic power generation system and maximum power point technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problem of not being able to guarantee the search for the global maximum power point, etc., and achieve the effect of enhancing adaptability and improving control algorithms
CN102495945AInactive Publication Date: 2012-06-13HOHAI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HOHAI UNIV
Publication Date
2012-06-13
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a valley delimitation searching method for tracking a multi-peak maximum power point of a photovoltaic power system. The valley delimitation searching method comprises the following steps of: for avoiding falling into a local maximum value during searching, partitioning a region after searching a valley by utilizing a valley delimitation method; for ensuring to obtain a global maximum value, performing sub-region search on a partitioned region and then determining region in which a maximum power point is located; finally, finding out a global maximum power point as a working point of a system by a variable-step-length searching method in the determined region. Through the algorithm design above, capability of responding complex environmental change of a practical photovoltaic power system can be strengthened, the shortage of a single-peak searching method is made up, and better maximum power tracking effect is reached.
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Description

technical field

[0001] The invention patent is a search method for solving the maximum power point tracking problem under multi-peak conditions in a photovoltaic power generation system, and belongs to the research field of optimal control and optimization methods. Background technique

[0002] In the photovoltaic power generation system, in order to maximize the output power of the photovoltaic power generation system, it is necessary to track the maximum power point of the output power of the photovoltaic cell, that is, to keep the system working at the peak point of the power curve, and to convert solar energy into electrical energy with maximum efficiency. The currently used optimization algorithms are mainly aimed at the case where the output characteristic curve is "single peak", mainly including: constant voltage method, disturbance observation method, and admittance increment method. The common idea of ​​these maximum power tracking methods is to continuously adjust ...

Claims

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