KR19980083939A - Module connection method of solar cell array - Google Patents

Abstract

The present invention divides the modules constituting the solar cell array into the appropriate sub-array unit and connects them in series so that the overall power reduction can be minimized even when some of the solar cell modules are shadowed. It is about. According to the module connection method of the solar cell array of the present invention, a plurality of solar cell modules composed of a plurality of solar cell cells are combined in a sub array unit, and at least one solar cell module is arranged in series connection branches of each sub array. The array is constructed by connecting the respective sub arrays in series with each other.

Description

Module connection method of solar cell array

The present invention relates to a module wiring method of a solar cell array, and in particular, by dividing the modules constituting the solar cell array into appropriate sub-array units and connecting them in series to reduce the overall power even when some of the solar cell modules are shadowed. The present invention relates to a method of connecting modules of a solar cell array so as to be minimized.

Solar cells are pollution-free power sources that convert light energy into electrical energy. These solar cells are used independently as main power sources such as electronic clocks, radios, unmanned lighthouses, unmanned repeaters, buoy lights, satellites, rockets, etc. Is used. In addition, a modular product is being marketed by connecting several solar cells that form a minimum unit in parallel as a means to obtain a large power, and in order to obtain even higher power, these solar cell modules may be directly connected in parallel. use. Hereinafter, in the present specification and claims, a set of these series-parallel connected solar cell modules is specifically referred to as an array.

1 is a view for explaining a module connection method of a conventional solar cell array. As shown in FIG. 1, a conventional solar cell array 1 is connected in series, and in this embodiment, six solar cell modules 3 are connected in series by a series wiring 2 (hereinafter, these are referred to as having a series connection). And the first and last solar cell modules 3 of each series connection branch are connected in parallel by common parallel wiring 4 to draw out the required power.

By the way, although the solar cell module is initially installed in a position that is not affected by the shadow of the surrounding obstacles, some of the solar cell modules have shadows as shown in FIG. Can be draped.

In this case, according to the conventional method of connecting the module of the solar cell array, since the shadowed solar cell module acts as a resistive component, power generated in the series connection branch is lost, and thus the overall power generation efficiency is lowered. There was a problem.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. By dividing the modules constituting the solar cell array into appropriate sub-array units and connecting them in series, minimizing the overall power reduction even when some of the solar cell modules are shadowed. It is an object of the present invention to provide a module wiring method of a solar cell array.

According to the method of connecting a module of a solar cell array of the present invention for achieving the above object, a plurality of solar cell modules consisting of a plurality of solar cells are combined in a sub-array unit, at least one in the series connection branch of each sub-array The array is configured by arranging the above solar cell modules and connecting the respective sub arrays in series.

1 is a view for explaining a module connection method of a conventional solar cell array,

2 is a view for explaining a module connection method of the solar cell array of the present invention.

*** Explanation of symbols for main parts of drawing ***

1, 10: solar cell array, 11: solar cell sub-array,

2, 12: serial wiring, 3, 13: solar module,

4, 14: common parallel wiring, 15: short-term parallel wiring

Hereinafter, a method for connecting modules of a solar cell array according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. Prior to the description, the operation principle of the solar cell will be briefly described.

The operation principle of a solar cell is similar to that of injecting electrons in the P-type semiconductors bonded to each other as water is blown to the N-type semiconductor side. That is, when light energy enters into the P-type semiconductor and is attached to the electrons, the electrons are separated from their orbits. If the electrons are continuously increased in this manner, the electrons naturally move to the adjacent N-type semiconductor side. Therefore, when light energy is continuously supplied and electron movement continues, electrons are reduced in the P-type semiconductor and eventually have a positive charge, and electrons accumulate in the N-type semiconductor and have a negative charge.

2 is a view for explaining a module connection method of the solar cell array of the present invention. As shown in FIG. 2, the solar cell array 10 according to the present invention combines the solar cell modules 13 in a unit of a sub array 11, and the sub arrays 11 thus obtained are mutually connected. It is configured by serial connection. Further, each sub array 11 is configured by connecting at least one or more solar cell modules 13 in series by serial wiring 12 and then connecting them in parallel by inter-level parallel wiring 15 again. In this embodiment, two solar cell modules 13 are arranged in each series connection branch, and the four series connection branches obtained in this way are connected in parallel with the inter-level parallel wiring 15 to form one sub array 11. .

In the solar cell array 10 of the present invention having the above-described configuration, when no shadow is cast on any of the solar cell modules 13, normal power generation occurs. In this state, as shown by the shaded portion, when some of the solar cell modules 13 cast a shadow, the power generation does not occur only in the corresponding series connection branches of the corresponding sub-array 11, but the rest of the series In the solar cell module 13 arranged on the connection branch is a normal power generation. As a result, even when a shadow is cast on the solar cell module 13, power is not generated only in a series connection branch including the shadowed solar cell module, thereby reducing power loss. In the example of the solar cell array of FIG. 1, the power loss reaches 3/4 of the total generated power, but in the example of FIG. 2 showing the solar cell array according to the present invention, the power loss is only 1/4.

The module connection method of the solar cell array of the present invention is not limited to the above-described embodiments, and can be modified in various ways within the scope of the technical idea of the present invention. For example, in the above-described embodiment, it has been described that two solar cell modules are arranged in each series connection branch of the sub array, but this may be appropriately increased or decreased.

According to the module connection method of the solar cell array of the present invention as described above, even if a shadow is cast on some of the solar cell module by dividing the modules constituting the solar cell array into appropriate sub-array units and connecting them in series. It is possible to minimize the power reduction, thereby lowering the cost of power generation.

Claims (1)

Combining a plurality of solar cell modules consisting of a plurality of solar cells in a sub-array unit, at least one solar cell module is arranged in a series connection branch of each sub array, and the respective sub arrays are connected in series to each other Module connection method of the solar cell array to be configured.