Patent · US Active

Determination of the load capability of a DC voltage source which is connectable to an electric power grid via an inverter and a grid disconnect switch

US8362658B2 · kind B2 · utility

2Cited by

5References

22Claims

0Family size

Assignee

SMA Solar Technology AG · DE

Inventors

Alexander Ahlborn · Bovenden, DE
Wilfried Groote · Vellmar, DE
Wolfgang Reichenbaecher · Staufenberg, DE

Key dates

Filing date	Nov 20, 2009
Grant date	Jan 29, 2013
Priority date	—
Expiry date	May 10, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH02J3/38
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A method for determining a load capability of a direct current (“DC”) voltage source connectable to an alternating current (“AC”) power grid having a predetermined frequency via an inverter and a grid disconnect switch includes controlling, while the grid disconnect switch is in an open position, the inverter so as to convert a DC input voltage to a test frequency different than the predetermined frequency of the AC power grid so as to increase a test load acting on the DC voltage source above an internal consumption of the inverter at the predetermined frequency. The DC input voltage is measured while the grid disconnect switch is in the open position.

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