Dynamic Simulation and Control Strategy for Three-Shaft Marine Electric Propulsion Gas Turbine

2010 ◽  
Author(s):  
Chenyu Wei ◽  
Shusheng Zang
Keyword(s):  
Control System ◽  
Gas Turbine ◽  
Control Strategy ◽  
Electric Propulsion ◽  
Dynamic Performance ◽  
Propulsion System ◽  
System Quality ◽  
Matching Problems ◽  
Electric Propulsion System ◽  
And Control

Three-shaft gas turbine was applied to marine electric propulsion system. The dynamic performance and control strategy of the three-shaft marine electric propulsion gas turbine arrested investigator’s attention, because they are very different from that of single-shaft gas turbine due to the complicated rotor structure. In this study, a model of nonlinear differential equation set is built to calculate the dynamic performance of three-shaft gas turbine and a simulation model of three-shaft marine electric propulsion gas turbine is constructed using the platform of MATLAB/SIMULINK. An adaptive software is developed for three-shaft gas turbine simulation. The new matching problems and changing rules among parameters are investigated in the case of load rejection of marine electric propulsion system. Multi-closed loop control system, instead of traditional control system, is introduced in order to improve the system quality and safety.

scholarly journals Comparison of Diesel-Electric with Hybrid-Electric Propulsion System Safety Using System-Theoretic Process Analysis

2019 ◽  
Author(s):  
V Bolbot ◽  
G Theotokatos ◽  
E Boulougouris ◽  
D Vassalos
Keyword(s):  
Electric Propulsion ◽  
Process Analysis ◽  
Hazard Analysis ◽  
Propulsion System ◽  
Cruise Ship ◽  
Propulsion Systems ◽  
Electric Propulsion System ◽  
Automation And Control ◽  
Hybrid Electric ◽  
And Control

Cruise ship industry is rapidly developing, with both the vessels size and number constantly growing up, which renders ensuring passengers, crew and ship safety a paramount necessity. Collision, grounding and fire are among the most frequent accidents on cruise ships with high consequences. In this study, a hazard analysis of diesel-electric and hybrid-electric propulsion system is undertaken using System-Theoretic Process Analysis (STPA). The results demonstrate significant increase in potential hazardous scenarios due to failures in automation and control systems, leading to fire and a higher number of scenarios leading to propulsion and power loss in hybrid-electric propulsion systems than on a conventional cruise-ship propulsion system. Results also demonstrate that STPA enhancement is required to compare the risk of two propulsion systems.

scholarly journals Installation of a Gas-Turbine/Electric Propulsion System in a 65 Foot Patrol Boat

1995 ◽  
Author(s):  
J. B. Brown ◽  
Nicholas F. Martino ◽  
William S. Stavenger ◽  
C. M. Lee
Keyword(s):  
Gas Turbine ◽  
Electric Propulsion ◽  
Propulsion System ◽  
Foot Patrol ◽  
Electric Propulsion System ◽  
Electrical Propulsion

This paper presents a descriptive summary of the significant features of a gas-turbine/electrical propulsion system as installed in a 65 foot patrol boat for test purposes.

Transient Performance and Control System Design of Solid Oxide Fuel Cell/Gas Turbine Hybrids

2008 ◽  
Author(s):  
Florian Kroll ◽  
Annette Nielsen ◽  
Stephan Staudacher
Keyword(s):  
Control System ◽  
Gas Turbine ◽  
Control Strategy ◽  
Coupled Model ◽  
Cathode Side ◽  
Safe Operation ◽  
System Failures ◽  
Time Calculation ◽  
Set Up ◽  
And Control

The presentation of a control strategy for the most important SOFC / gas turbine hybrid system maneuvers like start-up, shutdown or system-failures is one of the main issues of this paper. For a successful system simulation during different operational states, a coupled model of a gas turbine and a SOFC was combined with the proposed control system. To keep the model structure lean enough for real-time calculation, a non-linear lumped volume model with modular set up was chosen to achieve an accurate reflection of the dynamic effects. The control strategy takes into account the requirements of the gas turbine components but also necessitates safe operation of the SOFC. Specified boundary conditions are strictly to be considered within the control structure to ensure failure-free and safe operation during the entire operation range. In the presented hybrid cycle a possibility of bypassing both, the cold side of the recuperator and the cathode side of the SOFC is suggested. These two bypasses, which introduce two additional actuators to the system, allow the SOFC stack temperature to be kept in its limits more easily.

The Procurement of a 1–2MW Gas Turbine Alternator for the Royal Navy

2000 ◽  
Author(s):  
James A. Fielder
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Electric Propulsion ◽  
Propulsion System ◽  
Royal Navy ◽  
Procurement Process ◽  
Electric Propulsion System ◽  
High Level

This paper provides a high level overview of why the Royal Navy is seeking to procure a 1–2MW Gas Turbine Alternator as part of a full electric propulsion system. It describes the Royal Navy requirements of marine gas turbines and highlights the reasons for the adoption of Integrated Full Electric Propulsion. The paper also describes the major technical and commercial requirements of the 1–2MW gas turbine alternator and the procurement process that was used to select the prime contractor.

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