Confluence system and method for improving power generation efficiency of photovoltaic system

Abstract

The invention provides a convergence system which comprises a digital signal processing unit, a data acquisition unit, a switching drive circuit and at least one connection branch circuit. The connection branch circuit includes a first branch circuit and multiple second branch circuits, wherein every input end of the second branch circuits is connected to an output end of the second branch circuit and an output end of the first branch circuit respectively through a first switch device and a second switch device. The digital signal processing unit creates a switching instruction according to current acquired by the data acquisition unit and maximal power and a maximal efficiency point of every inverter, so as to enable the switching drive circuit to output control signals for switching on or switching off the first switch devices and the second switch devices. The invention further provides a method for improving the generating efficiency of the photovoltaic system. According to the convergence system and the method, the first switch devices and the second switch devices are controlled through detecting output power of every connection branch circuit, and convergence and transformation of current input by multiple photovoltaic circuits are realized, and thus the general generating efficiency of the photovoltaic system is effectively improved.

Description

technical field [0001] The invention relates to the field of photovoltaic power generation, and more specifically, to a confluence system and a method for improving power generation efficiency of a photovoltaic system. Background technique [0002] Solar energy is a kind of clean renewable energy, which is more and more favored by people. Solar photovoltaic system is a system that converts solar energy into electrical energy by using solar cell components and other auxiliary equipment. It can not only reduce the pressure of energy crisis, but also protect and improve the environment. It is supported by many governments including my country. [0003] Solar photovoltaic grid-connected power generation system is one of the most widely used photovoltaic power generation systems at present. It converts the direct current generated by the photovoltaic array into alternating current that meets the requirements of the mains grid through a grid-connected inverter and then directly co...

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a confluence system and a method for improving the power generation efficiency of the photovoltaic system in view of the problem that the conversion efficiency of the inverter in the photovoltaic system is not high

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