Modernization of Speed MonitoringTHM gas turbines

During normal operation the gas turbine is controlled by the power turbine speed adjusted to the requirements of the main process. Speeds exceeding the design limits may lead to significant damages to the gas turbine due to enhanced mechanical load on the bearings and the rotating components. In order to protect the gas turbine against overspeed dama-ges the gas generator speed and the power turbine speed are continuously observed.

Modernization SolutionTo modernize the speed monitoring of existing THM gas turbines MAN PrimeServ provides a current standard multi-channel speed measurement and overspeed protection system based on a Jacquet FT3000 evaluation unit with an internal 2 out of 3 voting logic for the gas generator and the power turbine speed:

n 3 speed channels for gas generator speedn 3 speed channels for power turbine speedn 1 speed channel for starter speedn Internal relay voting 2 out of 3 for gas generator and power turbine speedn 10 ms reaction timen High integrity redundant system conceptn IEC 61508 SIL3 certified and API 670 compliant

To enable the 2 out of 3 voting within the modification a third speed probe is installed on both the gas generator and the power turbine. Additionally, the existing speed probes on

MAN PrimeServ provides a modern speed measurement and

overspeed protection system to upgrade the speed monitoring of

existing THM gas turbines.

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Modernization of Speed MonitoringTHM gas turbines

MAN Diesel & Turbo86224 Augsburg, Germany Phone +49 821 322-0Fax +49 821 322-3382mtprimeserv@man.euwww.mandieselturbo.com

the gas generator, the power turbine and the starter are replaced by new ones.

BenefitsThe new speed measurement and overspeed protection system provides reliable protec-tion of the gas turbine against possible damages due to overspeed:

n Immediate tripping of gas turbine via safety related control system and program- mable logic controller in case of overspeedn High reliability due to high integrity redundant system concept and internal relay voting 2 out of 3 for gas generator and power turbine speedn Continuous monitoring of function of componentsn Realization of safety requirements up to IEC 61508 SIL 3 level

Comprehensive ModernizationMAN PrimeServ provides comprehensive modernization concepts to modernize your equipment – no matter if you want to optimize reliability, operating costs, environmental sustainability or any other characteristic of the equipment. Please contact us for further information.

All data provided in this document is non-binding. This data serves inform

ational purposes only and is especially not warranted or guaranteed in any w

ay. Depending on the specific individual projects, the relevant data may be subject to changes and w

ill be as-sessed and determ

ined individually for each project. This will depend on the particular characteristics of each individual project, especially specific site and operational conditions · C

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iesel & Turbo · PLM.082013.3 · Printed in G

ermany

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