Patent · US Active

Method and apparatus for detecting an arc in a DC circuit

US9435845B2 · kind B2 · utility

1Cited by

5References

16Claims

0Family size

Assignee

SMA Solar Technology AG · DE

Inventors

Johannes Lang · Bad Wildbad, DE
Thomas Wegener · Neuruppin, DE
Marcel Kratochvil · Kassel, DE
Holger Behrends · Hannover, DE
Michael Viotto · Kassel, DE

Key dates

Filing date	Mar 31, 2014
Grant date	Sep 6, 2016
Priority date	—
Expiry date	Mar 11, 2035

Classification

Technology area (CPC H)Electricity
CPC primaryH02H7/205
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The disclosure relates to a method for detecting an arc in a DC circuit. The method includes measuring and analyzing an AC component (IAC) of a current (I) flowing in the circuit and determining at least one parameter of the AC component (IAC). The level of a DC component (IDC) of the current (I) is varied and a degree of correlation between the level of the DC component (IDC) of the current (I) flowing in the DC circuit and the at least one parameter of the AC component (IAC) is determined. An arc is detected and selectively signaled based on the degree of the determined correlation. The disclosure also relates to an apparatus for carrying out the method and to an inverter comprising such an apparatus.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.