The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 31, 2018
Filed:
Sep. 08, 2014
Siemens Aktiengesellschaft, Munich, DE;
Martin Ophey, Straelen, DE;
Martin Bennauer, Bottrop, DE;
Thorsten Engler, Moers, DE;
Susanne Haas, Mulheim an der Ruhr, DE;
Andreas Pahl, Dusseldorf, DE;
Marian-Peter Pieczyk, Dusseldorf, DE;
Martin Stapper, Kamp-Lintfort, DE;
David Veltmann, Essen, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A method for testing an overspeed protection apparatus of a single-shaft system that includes: a) operating the system at nominal speed and under electrical load, wherein the load is selected to be low enough that, after dropping the load, the speed of the system rises such that the speed remains below steam turbine threshold speed lower than gas turbine threshold speed, such that first overspeed protection is triggered when the speed of the steam turbine reaches the steam turbine threshold speed, and second overspeed protection is triggered when the speed of the gas turbine reaches the gas turbine threshold speed; b) dropping the load; c) increasing the mass flow of the steam introduced into the steam turbine and/or of the fuel introduced into the gas turbine such that the speed of the steam turbine reaches the steam turbine threshold speed; d) testing whether the first overspeed protection is triggered.