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Detecting a serial arc in an electrical installation

A technology of electrical equipment and series arcs, which is applied in the direction of power supply testing, electrical components, photovoltaic system monitoring, etc., to achieve the effects of reducing interference, improving reliability, and increasing reliability

Active Publication Date: 2015-09-09
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this method is very sensitive to disturbances and disturbances caused by inverters

Method used

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  • Detecting a serial arc in an electrical installation
  • Detecting a serial arc in an electrical installation
  • Detecting a serial arc in an electrical installation

Examples

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Embodiment Construction

[0045] figure 1 An electrical installation 10 is shown in a schematic block diagram, comprising an arrangement of photovoltaic modules 12 as a DC voltage source and an inverter 14 connected via a relay switch 16 . The electrical device 10 additionally has a device 36 for detecting series arcs in the electrical device 10 .

[0046] The device 36 includes a monitoring unit 32 which is provided for monitoring the voltage in the electrical device 10 with the aid of the voltage sensor 20 for voltage changes and for monitoring the current with the aid of the current sensor 18 for current changes. In addition, the device 36 includes an evaluation unit 30 , which is designed to evaluate the detected voltage and current changes for detecting series arcs and to generate a signal as a function of the evaluation result by means of the output unit 22 . The device 36 also has a determination unit 26 which is provided to determine whether there is a spontaneous change in the current normal ...

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Abstract

The invention relates to electrical equipment to detect the series arc device, wherein the device has a monitoring unit as well as the analysis unit, the monitor unit is used for monitoring the voltage and / or current changes, the unit is used to analysis the identified changes of voltage and current to detect series arc, and to generate the signals according to the results of the analysis.According to the invention, the device includes: determining unit, it is used to determine whether there is spontaneous change of running status of the current routine, it is not only in the spontaneous change voltage, and current decline;Comparing unit, used for the voltage change of values and corresponding electric current and voltage changes in time phase change of numerical compared with the comparison of corresponding values, and based on the voltage and current changes in the corresponding numerical more than the value of at least one time to determine the arc indicated value;Inspection unit, its arc used to examine the indicated value of periodic;And output unit, used for the inspection result is negative output the signal.

Description

technical field [0001] The invention relates to a device for detecting series arcs in an electrical installation comprising a DC voltage source and an inverter connected to the DC voltage source, wherein the device has a monitoring unit and an evaluation unit, the monitoring unit The evaluation unit, which is provided for monitoring the voltage with respect to voltage changes and the current with respect to current changes in electrical installations, is designed to evaluate the determined voltage and current changes in order to detect series arcs and to generate a signal as a function of the analysis. Furthermore, the invention relates to a method for detecting series arcs in an electrical installation comprising a DC voltage source and an inverter connected to the DC voltage source, for which purpose the voltage in the electrical installation is monitored with respect to voltage changes and with regard to The current change monitors the current, analyzes the detected voltage...

Claims

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Application Information

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IPC IPC(8): G01R31/02H02S50/10
CPCG01R31/40H02S50/10G01R31/026H02H1/0015H01L31/02021G01R31/52G01R31/54Y02E10/50
Inventor F.埃哈德F.费斯特尔J-M.马特尔
Owner SIEMENS AG
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