Charge control method of photovoltaic charge controller

A charging control method and charging controller technology, which are applied in current collectors, battery circuit devices, electric vehicles, etc., can solve the problems of low control accuracy, slow response speed, cumbersome control judgment, etc., so as to improve control accuracy and prolong service life. , the effect of accurate maximum power tracking

Active Publication Date: 2013-06-05
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of cumbersome control and judgment, low control precision and sl...

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  • Charge control method of photovoltaic charge controller

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Embodiment Construction

[0015] figure 1 It is a structural block diagram of a specific embodiment of the photovoltaic charging control system of the present invention. Such as figure 1 As shown, the photovoltaic charging control system 1 is composed of a photovoltaic array 10 , a photovoltaic charging controller 11 and a battery pack 12 . The photovoltaic charging controller 11 applies the photovoltaic charging control method 13 to realize the charging control of the photovoltaic array 10 to the battery pack 12 . The photovoltaic array 10 serves as the input power source of the photovoltaic charge controller 11 , and the output of the photovoltaic charge controller 11 is connected to the storage battery pack 12 .

[0016] The photovoltaic charging control method of the present invention adopts a closed-loop control method. figure 2 It is a flow chart of the photovoltaic charging control method of the present invention. Such as figure 2 As shown, the specific steps of the control method are:

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Abstract

A charge control method of a photovoltaic charge controller is characterized in that charging models needed by a storage battery energy storage system are obtained through judgment, corresponding control algorithms are adopted according to the different charging models to obtain input voltage instructs, and the purpose of accurately and fast controlling the charging models is achieved through a double closed loop of input voltage and an output current and feedforward control. The charging models are all used for controlling the input voltage so as to enable the control algorithms to be simple, convenient and practical, and smooth switchover among the charging models can be achieved. The photovoltaic charge controller is enabled to have the advantages of being high in dynamic response speed and control precision, and simple in control procedures through a control method of combining of the closed loop and the feedforward control. The purposes of carrying out high-efficient, fast and accurate maximum power tracing, equalized charging and floating charging continuation multi-model charge control on the storage battery energy storage system through the photovoltaic charge controller are well achieved. According to the charge control method of the photovoltaic charge controller, photovoltaic charging speed can be improved, voltage control precision of a storage battery group can be improved, and service life of a storage battery is prolonged.

Description

technical field [0001] The invention relates to a control method for charging a storage battery energy storage system by a photovoltaic charging controller. Background technique [0002] The field of photovoltaic power generation is developing rapidly, and its application fields are constantly expanding. With the continuous expansion of photovoltaic power generation capacity, the photovoltaic power generation system has developed from the original non-adjustable power generation mode to the adjustable power generation and can participate in grid dispatching. [0003] This requires that the photovoltaic power station is no longer a power fluctuation and non-adjustable power generation system. Photovoltaic power stations need to increase the energy storage link to realize the adjustable and dispatchable power of the power station. Adding an energy storage system to a photovoltaic power station not only ensures stable and reliable output power of the photovoltaic system, but ...

Claims

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Application Information

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IPC IPC(8): H02J7/00
Inventor 王环杨子龙许洪华
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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