Photovoltaic cell MPPT simulation method based on fuzzy logic control

A technology of fuzzy logic and fuzzy control, applied in general control systems, control/regulation systems, simulators, etc., can solve problems such as small conductance value, large amount of online calculation, and few measurement parameters
CN106950857AInactive Publication Date: 2017-07-14NANTONG UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NANTONG UNIVERSITY
Publication Date
2017-07-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention discloses a photovoltaic cell MPPT simulation method based on fuzzy logic control. The method comprises design of a fuzzy logic controller and fuzzy logic control simulation; wherein the design of the fuzzy logic controller comprises: determining input / output amount and the structure of the controller, determining the fuzzy subset and the domain of the input / output amount, determining the subordinating degree function of the input / output amount and determining the fuzzy control rule, etc. Through combination of the control idea of the perturbation and observation method and the fuzzy logic control theory, the photovoltaic cell MPPT simulation method based on fuzzy logic control is provided; the simulation model is built to compared with and simulate the perturbation and observation method and the conductance increment method; according to the simulation result, the fuzzy logic control is very suitable for the MPPT control of the photovoltaic system so as to rapidly and accurately lock the MPP range, and the fluctuation is little after the system is stable.
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Description

technical field

[0001] The invention relates to a photovoltaic battery MPPT simulation method. Background technique

[0002] Affected by external environmental factors such as temperature and light intensity, photovoltaic cells show strong nonlinearity in actual work. Under different conditions, photovoltaic cells have different and unique maximum power points (MPPs). Therefore, research on photovoltaic cells The strategy of battery maximum power point tracking (MPPT) to ensure maximum conversion of light energy into electrical energy by photovoltaic cells is of great significance to the development of photovoltaic power generation technology.

[0003] The essence of MPPT is a dynamic self-optimization process, which plays a role in matching the internal resistance of photovoltaic cells and external load impedance, and MPP is the best operating point of photovoltaic cells. At present, the commonly used MPPT algorithms mainly include constant voltage method (CVT), perturbati...

Claims

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