Intelligent solar charging control system and control method

A charging control and control method technology, applied in control/regulation systems, collectors, photovoltaic power generation, etc., can solve problems such as power generation efficiency reduction, and achieve the effect of system charging stability

Inactive Publication Date: 2019-10-01
SHENZHEN DEV POWER SUPPLY ELECTRICAL
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Problems solved by technology

[0007] For the second method, MPPT charging is forcibly converted to constant voltage charging. After switching over, because the light changes a little or the charging method is changed, the current working point will deviate from the maximum power point, and the energy provided by the solar panel is not enough to meet the constant voltage condition. , will return to the MPPT charging mode, resulting in constant switching between the two charging modes, which will greatly reduce the power generation efficiency of the system

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  • Intelligent solar charging control system and control method

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Embodiment Construction

[0024] The present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

[0025] like Figure 1-3 As shown; the present invention proposes a brand-new concept called Ruduce powerpoint tracking technology (Ruduce powerpoint tracking), which is abbreviated as RPPT technology in this paper. The powerpoint tracking technology refers to tracking the power of solar panels. , to reduce the output power of the solar panel. Centering on the battery constant voltage charging voltage (the voltage is a definite value), when the battery voltage is lower than the constant voltage charging voltage, the system adopts high-speed MPPT technology; when the battery voltage is greater than the constant voltage charging voltage, the system adopts high-speed RPPT technology, The output power of the solar panel is properly reduced to meet the requirement of constant voltage charging of the battery. (The control targets of both RPPT and M...

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Abstract

The invention relates to an intelligent solar charging control system and control method. With a constant voltage charging voltage of a storage battery as a center, when the voltage of the storage battery voltage is smaller than or equal to a constant voltage equalized charging voltage, the system adopts high-speed MPPT charging. When the voltage of the storage battery is greater than constant voltage equalized charging voltage, the system adopts high-speed RPPT charging to achieve an appropriate reduction in the output power of a solar panel, the requirement of the constant voltage charging of the storage battery is satisfied, the seamless switching is achieved, and the charging of the system is stable. The invention combines RPPT with MPPT, the maximum power charging is achieved, and themanagement requirement for a constant voltage rechargeable battery is realized. The combination of MPPT charging and RPPT charging enables a seamless transition between MPPT and constant voltage charging, and the system is stable in charging.

Description

technical field [0001] The invention is mainly applicable to solar off-grid power generation systems, and the application of solar energy to MPPT charging of storage batteries, and solves the problem that MPPT charging and constant voltage charging cannot be switched smoothly. Background technique [0002] Solar off-grid power generation systems are more and more widely used. Solar panels charge batteries through solar chargers, which is the core part of off-grid systems. In order to make full use of solar panels, MPPT (Maximum Power Point Tracking) technology is adopted. MPPT tracking of solar panels is indispensable for battery charging management. But during the whole charging process, if Figure 4 , when charging the battery, when entering constant voltage charging, if the energy provided by the solar energy is insufficient, and the solar output curve is a non-monotonic curve, the battery voltage cannot be stabilized, and MPPT charging and constant voltage charging canno...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/35H02J7/00G05F1/67
CPCG05F1/67H02J7/0077H02J7/35Y02E10/56
Inventor 王民康蔡劲松
Owner SHENZHEN DEV POWER SUPPLY ELECTRICAL
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