Grid-connected inverter for optimizing minimum unit of solar cell
A solar cell, the smallest unit technology, applied in the direction of adjusting electrical variables, single-grid parallel feeding arrangement, instruments, etc., can solve problems such as cost increase and complex structure, and achieve the effect of simple control circuit, easy implementation and integration
Inactive Publication Date: 2011-08-10
王红卫
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Problems solved by technology
In this inverter device, theoretically, any damage to one or several groups of battery modules will not affect the work of the entire array, thereby improving the life of the entire device; of course, limited to the low efficiency of silicon cells, this technology cannot The scale of the module is too low, otherwise the whole structure will be too complicated and the cost will be greatly increased
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[0008] Such as figure 1 As shown, if the present invention requires ten sets of GaAs material solar cells 1 , then ten sets of DC / DC converters 2 need to be equipped.
[0009] First connect a group of GaAs material solar cells 1 with a group of DC / DC converters 2 in one-to-one correspondence to form ten groups of modules or arrays with a certain output voltage.
[0010] Then connect the modules or arrays in series, and finally connect the grid-connected alternating current through the DC / AC inverter 3 in series.
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The invention discloses a grid-connected inverter for optimizing a minimum unit of a solar cell, which relates to the technical field of solar power grid connection. The grid-connected inverter comprises DC / DC converters in a number the same as that of cells. The cells are correspondingly connected with the DC / DC converters one to one, groups of batteries and DC / DC converters are connected in series, and then a formed module or array is connected in series with grid-connected alternating current by the DC / AC inverter. The grid-connected inverter is mainly applied to an inversion structure for the novel gallium arsenide solar cell. Due to the adoption of light focusing equipment, the efficiency of the gallium arsenide solar cell can be dozens of times that of a silicon solar cell, so a using body is provided for the cell inverter, namely, each cell unit can be configured with the DC / DC converter, and all the DC / DC converters are connected in series to form the array or module with required power. Therefore, the energy of each cell is maximally utilized, and the service life of the cell is greatly prolonged.
Description
technical field [0001] The invention relates to the technical field of grid-connected solar power. Background technique [0002] The existing inverters are mainly divided into two types: one is a single array-level inverter, that is, a general inverter for the entire silicon solar cell array (many single cells are connected in series and parallel). It is characterized by simple structure; the disadvantage is that if one battery in the array is broken, the entire array will fail. The other is a module-level inverter, that is, each module in the array has its own DC-to-DC (DC / DC) converter and corresponding maximum power tracking control. These converters are connected in series, and then Equipped with a direct current to alternating current (DC / AC) inverter. In this inverter device, theoretically, any damage to one or several groups of battery modules will not affect the work of the entire array, thereby improving the life of the entire device; of course, limited to the low...
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Login to View More IPC IPC(8): H02J3/38G05F1/67
CPCY02E10/58Y02E10/563Y02E10/56
Inventor 王红卫
Owner 王红卫