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Maximum power tracing method and device

A technology of maximum power tracking and minimum power, which is applied in photovoltaic power generation, instruments, and adjustment of electrical variables, etc., and can solve problems such as large shocks, difficult performance, and poor effects

Active Publication Date: 2018-05-04
深圳市英威腾光伏科技有限公司
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  • Claims
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Problems solved by technology

For ΔV, if the value of ΔV is too large, the output of the solar panel will fluctuate around the maximum power point, which will cause large shocks; if the value of ΔV is too small, although the tracking accuracy can be guaranteed, it will take more time. When the maximum power point changes frequently, the effect will be worse, and it is difficult to balance the performance of the two

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Embodiment Construction

[0053] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0054] Aiming at the above-mentioned problems in the background technology, this application provides a more effective maximum power tracking method and device, which can be applied to photovoltaic power generation systems. This method can reduce the power oscillation of MPPT maximum power tracking, and can provide more effective The advanced tracking algorithm can not only improve the control precision, reduce the power shock, but also ensure the tracking spee...

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Abstract

The application provides a maximum power tracing method and a maximum power tracing device. The method includes steps of monitoring output power and PV voltage of a solar panel according to the setting frequency; calculating to obtain adjusting step base of the PV voltage according to the monitored output power and the PV voltage of the solar panel; adjusting the counting value of MPPT according to the output power of the solar battery this time, the output power detected last time and preset minimum power adjusting value; adjusting the PV reference voltage on the basis of the adjusting step base according to the comparison result of the adjusted counting value of MPPT and the set MPPT reference value; using the PV reference voltage as the control target of a past-grade power circuit. Themaximum power tracing method and device have the advantages of realizing the purpose of reducing the power oscillation of the MPPT maximum power tracing.

Description

technical field [0001] The invention relates to the technical field of photovoltaic power generation equipment, in particular to a maximum power tracking method and device. Background technique [0002] At present, the proportion of photovoltaic power generation in the world is increasing, and the improvement of the utilization rate and efficiency of solar energy is of great significance to the entire industry. Due to the working characteristics of photovoltaic panels, coupled with the different working conditions in various places, the change of sunlight intensity, etc., in order to improve the utilization rate of solar energy, it is particularly important to track the maximum output power operating point of photovoltaic panels. [0003] At present, the most commonly used tracking technology in the industry is the disturbance observation method, which is to determine the increase or decrease of the solar panel operating voltage ΔV by comparing the output power of this solar...

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Application Information

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IPC IPC(8): G05F1/67
CPCG05F1/67Y02E10/56
Inventor 姜碧光姜亲宜
Owner 深圳市英威腾光伏科技有限公司
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