Patent · US Active

System and method for operating an on-load tap changer

US9570252B2 · kind B2 · utility

3Cited by

9References

13Claims

0Family size

Assignee

General Electric Company · US

Inventors

Piniwan Thiwanka Bandara Wijekoon · Nuremberg, DE
Eva-Maria Baerthlein · Hamburg, DE
Simon Herbert Schramm · Bayern, DE
Stefan Schroeder · Garching bei München, DE
Ara Panosyan · Munich, DE
Rohit Gupta · Redmond, US

Key dates

Filing date	Jan 27, 2014
Grant date	Feb 14, 2017
Priority date	—
Expiry date	May 28, 2035

Classification

Technology area (CPC H)Electricity
CPC primaryH01H2009/546
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A system for operating an on-load tap changer (OLTC) includes a plurality of legs that include mechanical switches. At least one leg switches from a first to a second tap of the OLTC on receipt of a tap change signal. At least one mechanical switch is activated to establish an electrical connection between one of the first and the second tap and a power terminal of the OLTC. Further, the system includes semiconductor switches that are parallel to the mechanical switches and when activated electrically couple one of the first and the second tap and the power terminal. The system includes a processing unit that selectively activates and deactivates the mechanical and semiconductor switches in such a way that electrical contact is maintained between at least one of the taps and the power terminal during the transition of at least one leg from the first tap to the second tap.

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