Control device and method for photovoltaic system maximum power point tracking

Abstract

The invention discloses a control device and method for photovoltaic system maximum power point tracking, and belongs to the technical field of new energy development and application. The control device is composed of a cell array, a detection device, a DC-DC boosting conversion circuit, a novel PWM controller and load equipment. The control device and method have the advantages that a hardware device is combined with computer software programming, the hardware device is simple in design, and software programming is popular and easy to understand; an adopted OVC control algorithm has a better tracking effect than a conductance increment method, and an ADRC control algorithm is additionally adopted, so that maximum power point tracking is more precise, high-precision tracking is achieved, and the response speed is higher; a new algorithm is adopted and combined with the PWM controller, so that compared with a traditional MPPT algorithm, the number of sensors is greatly reduced, detection errors caused by sensors are reduced, and project cost is reduced; the MPPT strategy proposed in the method is irrelevant to DC-DC topology, so that modularization and designing of the plug-and-play PWM controller are promoted.

Description

technical field [0001] The invention belongs to the technical field of new energy development and application, and in particular relates to a maximum power point tracking control device and a control method of a photovoltaic system, which adopts the latest optimal voltage control (Optimal Voltage Control, OVC) in the maximum power point tracking control strategy, and Combined with Active Disturbance Rejection Control (ADRC). The design of the control device is simple and the engineering cost is reduced, and the control method can realize the accurate tracking of the maximum power point of the photovoltaic power generation system, especially when the outside ambient temperature and the illuminance vary greatly. Background technique [0002] With the rapid economic development and increasing environmental pollution, the development and utilization of clean energy has become the primary task of various countries. Solar energy has become the most widely used new type of green e...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the shortcomings and deficiencies of the above technologies, the present invention provides a photovoltaic system maximum power point tracking control device and control method, which solves the problems of slow response speed and oscillation of the working point, and reduces the hardware cost of the traditional photovoltaic power generation system

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