Asymmetric region power optimization device and photovoltaic module

Abstract

The invention discloses an asymmetric regional power optimization device and a photovoltaic module, relates to the technical field of photovoltaic power generation, and aims to solve the problems of regional mismatch of the photovoltaic module and low regional power optimization efficiency and current quality. According to the invention, a scheme that part of the buck conversion circuits are not provided with inductors and filter by using a main filter inductor along with the series circuit and part of the buck conversion circuits are provided with an auxiliary filter circuit for filtering is mainly adopted in the multi-path buck conversion circuits of which the outputs are connected in series; therefore, when the lower area of the photovoltaic module is shielded and the individual power is reduced, the main filter inductor with higher inductance can be used for filtering along with the series circuit, and the auxiliary filter inductor with lower inductance can be used for filtering the upper area with normal power in the photovoltaic module, so that ripples are prevented from being superposed on the series circuit, and the reliability of the photovoltaic module is improved. Therefore, the optimization device has better adaptability, higher conversion efficiency and higher current quality.

Description

technical field [0001] The invention relates to the technical field of photovoltaic power generation, in particular to an asymmetric area power optimization device, a photovoltaic module, and a photovoltaic module including the device. Background technique [0002] The two-way area power optimization scheme uses MPPT power optimization circuit to replace the traditional bypass diode ground, respectively optimizing the upper and lower battery string areas of the photovoltaic module (vertical installation). Compared with the traditional photovoltaic module-level power optimization scheme, this scheme can prevent the hot spot effect to the greatest extent and prolong the service life of photovoltaic modules. In addition, the photovoltaic modules with dual-channel regional power optimization also have stronger environmental adaptability, which is convenient for vertical installation with lower cost. This vertically installed photovoltaic module will reduce the power loss caused...

AI Technical Summary

Problems solved by technology

[0004] It can be seen that the current symmetrical two-way power optimization device cannot well meet the needs of photovoltaic module application scenarios, not only the inductance and capacitance in the upper area power optimization circuit At the same time, the inductance and capacitance in the power optimization circuit in the lower area often have insufficient performance, so that the output ripple current of the power optimization device is too high, and the efficiency of power conversion is low

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