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Inverter unit without transformer for thin-film solar panels

An inverter and boost converter technology, applied in the direction of converting irreversible DC power input into AC power output, with reversible conversion equipment, electrical components, etc., can solve the problem of increased manufacturing and installation costs, commutation The large space of the converter, the complicated structure of the converter, etc.

Active Publication Date: 2012-12-12
SMA SOLAR TECH AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such converters are generally more difficult to produce and larger than transformerless converters, which on the one hand increases the manufacturing and installation costs and on the other hand requires more space for the converter
Furthermore, such converters are more complex in construction and less efficient

Method used

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  • Inverter unit without transformer for thin-film solar panels
  • Inverter unit without transformer for thin-film solar panels
  • Inverter unit without transformer for thin-film solar panels

Examples

Experimental program
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Embodiment Construction

[0016] exist figure 1 A solar cell device 1 schematically shown in , includes a solar panel 2 and a three-phase inverter unit 4 . The positive terminal 22 of the solar panel 2 is connected to the positive input terminal 5 of the inverter unit 4, the negative terminal 23 of the solar panel 2 is connected to the negative input terminal 6 of the inverter unit 4, and the capacitor 3 is connected in parallel with the solar panel 2 to the The two terminals 22, 23 of the solar panel 2 are connected. The capacitor 3 can be arranged in the vicinity of the solar panel 2 , in the vicinity of the inverter unit 4 or as an integrated component of the inverter unit 4 . The four-pole output terminals 24 of the inverter unit 4 are connected to the three-phase AC grid 13 . The four-pole output terminal can also be connected to another type of consumer, for example a synchronous motor. The inverter unit 4 includes a boost converter 8 , also referred to as a booster (Booster), an intermediate ...

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PUM

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Abstract

The invention relates to an electrical unit (4) comprising an input having a positive input connection (5) and a negative input connection (6), a boost converter (8), and an inverter (12) having a positive input (25) and a negative input (26), wherein a positive potential is built at the positive input (25) of the inverter (12) compared to the ground potential, and a negative potential is built at the negative input (26) of the inverter (12) compared to the ground potential, during operation, and wherein a substantially potential loss-free connection (7) exists between the positive input connection (5) and the positive input (25) of the inverter (12), and wherein the boost converter (8) is arranged between the negative input connection (6) and the negative input (26) of the inverter (12). The goal is to create an inverter (4) without transformer and without negative potential on the solar cell connections (22, 23), such that said inverter can be used with thin-film panels and particularly with thin-film panels of the superstrate configuration, without causing increased or extended corrosion damages.

Description

technical field [0001] The invention relates to an inverter unit for a solar cell. Background technique [0002] In the case of conventional solar cell installations, the direct current output from the solar cell must be converted into an alternating current having a voltage and frequency corresponding to the power supply network to be fed. This usually occurs in electronic inverter units, also known as inverters. Such a photovoltaic device may comprise a plurality of solar cells and / or a plurality of inverters. Individual solar cells are usually connected in series in so-called strings in order to increase the input voltage at the inverter, which helps to avoid electrical losses in the inverter circuit. The output voltage of the string can be up to over 1000V depending on the device type. At the same time, however, it must be ensured that persons or plant components are not endangered by the high voltage. Photovoltaic installations must therefore generally comply with o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38H02M7/48
CPCY02E10/563H02J3/383H02J3/382H02M7/48H02M1/14H02M1/32H02M3/156H02M7/79
Inventor U·博鲁普
Owner SMA SOLAR TECH AG