Apparatus and method for monitoring a photovoltaic system

A photovoltaic system and coupling device technology, which is applied in the monitoring, measuring device, photovoltaic power generation and other directions of photovoltaic system, can solve the problems of measurement accuracy and other problems, and achieve the effect of interference influence suppression and good interference influence.

Inactive Publication Date: 2013-03-27
SMA SOLAR TECH AG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] This known method is sensitive to incoupled interference signals

Method used

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  • Apparatus and method for monitoring a photovoltaic system
  • Apparatus and method for monitoring a photovoltaic system
  • Apparatus and method for monitoring a photovoltaic system

Examples

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Embodiment Construction

[0032] figure 1 A photovoltaic system 1 to be monitored is shown. The photovoltaic system 1 has a photovoltaic generator 2 which in turn comprises a plurality (eg two) photovoltaic modules not shown.

[0033] The positive DC voltage output of the photovoltaic generator 2 is connected to the positive DC voltage input of the inverter 3 through the power line 4 . The negative DC voltage output of the photovoltaic system 2 is connected to the negative DC voltage input of the inverter 3 through the power line 5 . The lines 4, 5 are considered to run continuously from the photovoltaic generator 2 to the inverter 3, whether or not an inductance is contained in the lines.

[0034] The inverter 3 is designed to convert the electrical energy produced by the photovoltaic generator 2 so that it can be fed into the grid system, for example into the public power supply network system 6 . For this purpose, the inverter 3 is connected to the supply network system 6 via power lines 7 , 8 . ...

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Abstract

The apparatus for monitoring a photovoltaic system (1) comprises incoupling means (20) for coupling an AC voltage test signal into the photovoltaic system (1), outcoupling means (40) for outcoupling a response signal, which is associated with the test signal, from the photovoltaic system (1), and an evaluation device (50), which is connected to the outcoupling means, for identification of events which adversely affect correct operation of the photovoltaic system. The apparatus is distinguished in that the outcoupling means (40) have a first transformer (410) and a second transformer (420), each having a respective primary winding (411, 421) and each having a respective secondary winding (412, 422) which is connected to the evaluation device (50), with the primary windings (411, 421) of the first and second transformers (410, 420) being arranged in different electrical lines (4, 5) between a generator (2) and an inverter (3) in the photovoltaic system (1). The invention also relates to a corresponding method for monitoring a photovoltaic system (1).

Description

technical field [0001] The present invention relates to apparatus and methods for monitoring photovoltaic systems to identify events, such as contact failures, that adversely affect the correct operation of the equipment. Background technique [0002] In a photovoltaic system, a photovoltaic generator formed from one or more photovoltaic modules relies on photoelectric conversion to provide electrical energy. To ensure correct operation, it is necessary to monitor photovoltaic systems in order to identify the occurrence of events that adversely affect the correct operation of the equipment. [0003] For example, these events could be: [0004] - theft of one or more components of the photovoltaic system, [0005] - Destruction of one or more components of the photovoltaic system [0006] — changes in the conductivity of one or more electrical connections of the photovoltaic system (e.g. contact aging and / or contact failure), [0007] — a drop in efficiency (deterioration...

Claims

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Application Information

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IPC IPC(8): G01R31/28G01R31/26
CPCH01L31/02021G01R31/2605Y02E10/50G01R31/405H02S50/10G01R31/2637
Inventor M·卡拉图彻维利S·比尼克H·贝伦茨M·霍普夫
Owner SMA SOLAR TECH AG
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