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Method for verifying electrical connection between generator and inverter using handheld device

A technology of handheld devices and inverters, used in electrical connection testing, measuring electrical variables, instruments, etc.

Inactive Publication Date: 2013-06-26
SMA SOLAR TECH AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand, problems often arise for installers or maintenance personnel in order to determine the connection of the PV generator or to test the wiring with the associated inverter.

Method used

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  • Method for verifying electrical connection between generator and inverter using handheld device
  • Method for verifying electrical connection between generator and inverter using handheld device
  • Method for verifying electrical connection between generator and inverter using handheld device

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Embodiment Construction

[0017] figure 1 A power generation system 1 is shown comprising a plurality of generators 10a, 10b, 10c, each connected by a respective cable to one of a plurality of inverters 20a, 20b, 20c. The cables are used to transmit the electrical energy produced by the generators 10a, 10b, 10c as direct current to the associated inverters. The handheld device 40 includes a current sensor 45 and a GPS receiver 48 . The handheld device 40 may for example be a so-called Smartphone, comprising an integrated GPS receiver and a magnetic field sensor, such as part of an electronic compass. Using such a magnetic field sensor, the strength and direction of the magnetic field can be measured, allowing the determination of the direct current flowing through the cable 30 placed near the magnetic field sensor. In this context, nearby means the range of distance between the magnetic field sensor 45 and the cable 30 to be tested, where the magnetic field induced by the DC current may differ from t...

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PUM

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Abstract

A method of verification of an electrical connection between a generator (10a) and an inverter (20b) by a cable (30) is disclosed. The method comprises placing a handheld device (40) with a current detection sensor (45) in vicinity of a cable (30). A command to change a current is transmitted from the handheld device (40) to the inverter (20b) to generate a current signature (150) within an inverter-generator connection cable. A sensor signature is detected by the current detection sensor (45) and compared to the current signature (150) caused by the command to change a current. A verification signal based on the comparison is generated. The method may be used to compile a wiring plan between a plurality of generators (10a, 10b, 10c) and a plurality of inverters (20a, 20b, 20c).

Description

technical field [0001] The invention relates to a method for verifying the electrical connection between a generator and an inverter. The invention further relates to a method for establishing a wiring plan for connecting a plurality of generators and a plurality of inverters. The invention further relates to a corresponding program application. Background technique [0002] In a time when fossil fuels are becoming scarcer and more expensive, the importance of producing energy from renewable sources is increasing. Therefore, the portion of electrical energy generated by photovoltaics is increasing. In this environment, a photovoltaic (PV) system typically includes a PV generator for converting sunlight into DC current and an inverter for converting the generated DC current into AC current suitable for being fed to the grid. To achieve higher fed powers, multiple PV generators are connected either to a single or a few integrated inverters, or to multiple smaller, decentral...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/02G01R31/58
CPCG01R31/60G01R31/67G01R31/54G01R31/52G01R31/58G01R31/66
Inventor B·马格努森H·普吕辛
Owner SMA SOLAR TECH AG