Method for improving overall efficiency of photovoltaic inverter system

A photovoltaic inverter and efficiency technology, which is used in photovoltaic power generation, control/regulation systems, and electrical variable adjustment. Improved reliability and high power generation efficiency

Inactive Publication Date: 2011-11-09
BAODING TIANWEI GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In fact, when the solar panels are blocked by the shadows of dark clouds, chimneys, trees and tall buildings, etc., when the panels are installed in different orientations, when there are differences between the panels produced, when some panels When damaged, the overall efficiency of the system drops drastically when dirt builds up on the panels
The reliability of the existing system is poor. Once the inverter fails, the entire system is in a state of paralysis, which seriously affects the power generation of the photovoltaic system in the entire life cycle.

Method used

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  • Method for improving overall efficiency of photovoltaic inverter system
  • Method for improving overall efficiency of photovoltaic inverter system
  • Method for improving overall efficiency of photovoltaic inverter system

Examples

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Embodiment 1

[0014] Embodiment 1, to provide an embodiment of the photovoltaic inverter system for the present invention, refer to the attached figure 2 , the system in this embodiment is composed of a photovoltaic sub-array 1, a photovoltaic sub-array 2, an inverter 3, and an inverter 4. The output of the photovoltaic sub-array 1 is connected to the input of the inverter 3, and the inverter 3 is connected to the photovoltaic The sub-array 1 performs MPPT control, so that the photovoltaic sub-array 1 outputs the maximum power, and converts the direct current generated by the photovoltaic sub-array 1 into alternating current, and then connects it to the grid. Similarly, the output of the photovoltaic sub-array 2 is connected to the input of the inverter 4, and the inverter 4 performs MPPT control on the photovoltaic sub-array 2 to make the photovoltaic sub-array 2 output at the maximum power, and the photovoltaic sub-array 2 The resulting direct current is converted to alternating current ...

Embodiment 2

[0015] Embodiment 2 is another embodiment of the photovoltaic inverter system provided by the present invention, refer to the attached image 3 , a string of battery panels forms a photovoltaic sub-array, and the corresponding inverter performs MPPT control on it. For example, the photovoltaic sub-array 1 is only composed of a string of battery panels, and the corresponding inverter 2 performs MPPT control on the photovoltaic sub-array 1 . The system of this embodiment is particularly suitable for medium-capacity power station projects, such as community, factory and other power station projects.

Embodiment 3

[0016] Embodiment 3, another embodiment of the photovoltaic inverter system provided by the present invention, refer to the attached Figure 4 , each photovoltaic sub-array in the system of this embodiment consists of only one solar panel, and each solar panel is equipped with an inverter. For example, the photovoltaic sub-array 1 is composed of a battery panel 11 , and the inverter 12 performs MPPT control on the battery panel 11 . The system is especially suitable for small-capacity projects, such as home projects and photovoltaic building-integrated projects.

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Abstract

The invention relates to a method for improving the overall efficiency of a photovoltaic inverter system, belonging to the technical field of photovoltaic applications. The technical scheme is that the photovoltaic inverter system comprises more than two photovoltaic sub arrays and each sub array is configured with an inverter with an MPPT (maximum power point tracking) function, wherein the photovoltaic sub array is composed of battery boards in series-parallel connection, the number of the battery boards in series-parallel connection are matched with the input voltage and current of the inverter, and each battery board string is connected with a diode in series in order to ensure the interaction among the battery board group strings. The photovoltaic inverter system provided by the invention has the advantages of high overall generating efficiency, good reliability and more generation capacity in the whole life cycle.

Description

[0001] Technical field: [0002] The invention relates to a method for improving the overall efficiency of a photovoltaic inverter system, belonging to the technical field of photovoltaic applications. Background technique: [0003] The full name of MPPT controller is "Maximum Power Point Tracking" (Maximum Power Point Tracking) solar controller. With the rapid development of social economy, the continuous reduction of mineral energy and the deterioration of the environment, clean and renewable energy, as an important method to solve energy and environmental problems, has received widespread attention from all countries in the world. Solar energy has the advantages of abundant resources and cleanness. Since the 1980s, solar power generation technology has been developing continuously and rapidly. At present, in the photovoltaic inverter system of the background technology, solar panels are connected in series and parallel to form a photovoltaic array, and the entire photovo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38G05F1/67
CPCY02E10/58Y02E10/563Y02B10/14Y02B10/10Y02E10/56Y02P80/20
Inventor 武卫革樊长在程志光翟志强赵志强穆桂霞李瑞珂
Owner BAODING TIANWEI GRP CO LTD
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