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Photovoltaic module mppt method combining global scan and quasi-gradient perturbation observation method

A disturbance observation method, a technology of photovoltaic modules, applied in photovoltaic power generation, instruments, control/regulation systems, etc., can solve the problems of difficult hardware implementation and complicated design process, and achieve the effect of achieving maximum power output and good maximum power output.

Active Publication Date: 2017-12-26
JIANGSU FRONTIER ELECTRIC TECH +3
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AI Technical Summary

Problems solved by technology

The multi-peak MPPT algorithm can avoid falling into local MPP, and can quickly adjust the system operating point to the new MPP when the external working conditions change suddenly or there is shadow occlusion; however, the design process of the above method is relatively complicated, and hardware implementation is relatively difficult

Method used

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  • Photovoltaic module mppt method combining global scan and quasi-gradient perturbation observation method
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  • Photovoltaic module mppt method combining global scan and quasi-gradient perturbation observation method

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Embodiment Construction

[0030] In order to further clarify the technical solution of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0031] Taking the photovoltaic power generation system based on Boost circuit as an example, its structure is as follows figure 1 shown, the capacitor C 1 And inductance L, capacitance C 2 , switch S 3 Waiting for the follow-up part to constitute the Boost circuit. S in the main circuit 1 and S 2 To measure the control switch, by controlling the S 1 and S 2 The on-off of the MPPT control system makes the MPPT control system run in different working states.

[0032] The working principle of the MPPT control system in this embodiment is as follows: the control circuit sends a command signal to drive the switch S 1 Disconnect, switch S 2 Closed, the photovoltaic module is separated from the Boost circuit and the load R1, and the subsequent circuit passes through the cap...

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Abstract

The invention discloses a photovoltaic module MPPT algorithm based on a global scanning and quasi-gradient disturbance observation method. The photovoltaic module MPPT algorithm comprises the following steps: positioning the global maximum power point of a photovoltaic module by using a programmable DC (direct current) electronic load; realizing maximum power output of the photovoltaic module through the quasi-gradient disturbance observation method; and finally, switching the scanning control policy by using constant power difference in the case of environmental sudden change. According to the embodiment of the photovoltaic module MPPT algorithm of the invention, the simulation result indicates that the method has relatively good dynamic performance and steady-state performance in any working condition.

Description

technical field [0001] The invention relates to a maximum power point algorithm of a photovoltaic module and belongs to the field of new energy power generation. Background technique [0002] The increasingly prominent energy crisis and environmental pollution have made countries increase the implementation and promotion of renewable energy. Among them, photovoltaic power generation technology has been widely developed and applied due to its unique power generation characteristics. In practical applications, photovoltaic modules, as the smallest power generation unit, are affected by light intensity, ambient temperature and external loads, and their output characteristic curves are nonlinear. In the application process of photovoltaic power generation, the primary problem is to improve the efficiency of photovoltaic power generation, that is, how to make the photovoltaic power generation system output the maximum power under any working conditions, so it is urgent to realize...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/67
CPCG05F1/67Y02E10/56
Inventor 陈凌戴锋韩伟王宏华许焕清翟学锋张经炜范立新王成亮
Owner JIANGSU FRONTIER ELECTRIC TECH
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