Three-body photovoltaic power generation direct-current optimizer with direct-through devices

Abstract

The present invention discloses a three-body photovoltaic power generation direct-current optimizer with direct-through devices. The three-body photovoltaic power generation direct-current optimizer comprises a monitoring circuit module and a power conversion circuit module. The three-body photovoltaic power generation direct-current optimizer can be connected with three photovoltaic panels and maintain the maximum power point tracking (MPPT) function, data acquisition, data transmission and protection shutdown of each three photovoltaic panel; three paths of input are adopted, wherein two paths of input share a power inductor and an output capacitor, and the three paths of input share one bypass circuit, one current sampling circuit, one MCU, one communication circuit and one auxiliary power supply circuit, and therefore, product cost reduction can be achieved; and the two direct-through circuit devices are adopted, and the direct-through circuit devices can be turned on automatically when a fault occurs on the control system of the optimizer, and therefore, the three photovoltaic assemblies can be directly connected into the system, so that the system can continue to work, power generation losses can be reduced, and the reliability of a power generation system can be improved.

Description

technical field [0001] The invention relates to an optimizer, in particular to a three-body photovoltaic power generation DC optimizer with a through device, belonging to the technical field of photovoltaic power generation. Background technique [0002] With the shortage of energy and the pollution of the environment, solar energy, as a renewable and non-polluting green energy, has been paid more and more attention by people, and photovoltaic grid-connected power generation technology has developed rapidly. The photovoltaic power generation system based on the optimizer is one of the high-efficiency photovoltaic grid-connected solutions. It is mainly composed of photovoltaic modules, DC optimizers and grid-connected inverters. Each photovoltaic module in the system is connected to a DC optimizer, which will The output terminals of the optimizer are connected in series, and then the energy is transferred to the grid through the centralized inverter. The photovoltaic power g...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a three-body photovoltaic power generation DC optimizer with a straight-through device that is used to solve the problem of high economic cost, huge system, inability to realize independent MPPT and poor stability in the prior art, so as to solve the problems in the above-mentioned background technology proposed question

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