0
TECHNICAL PAPERS: Gas Turbines: Nuclear Power

Control Options for Load Rejection in a Three-Shaft Closed Cycle Gas Turbine Power Plant

[+] Author and Article Information
B. W. Botha

School of Mechanical Engineering,  North-West University, Potchefstroom Campus, Private Bag X6001, Potchefstroom 2520, South Africabarend.botha@nwu.ac.za

P. G. Rousseau

School of Mechanical Engineering,  North-West University, Potchefstroom Campus, Private Bag X6001, Potchefstroom 2520, South Africa

J. Eng. Gas Turbines Power 129(3), 806-813 (Apr 27, 2006) (8 pages) doi:10.1115/1.2718225 History: Received December 29, 2004; Revised April 27, 2006

An important issue to be addressed in power plants is the continued operation during load transients, such as load following and load rejection. It is inevitable that with new power plant technology, new control strategies will be required. One such technology investigated for commercial power plants is that of a three-shaft recuperative inter-cooled closed-loop Brayton cycle with a high-temperature gas-cooled nuclear reactor as the heat source and helium as coolant. Because of its unique configuration, the utilization of traditional power plant control strategies is limited. In order to address this, detailed cycle analyses were performed to identify new potential control strategies. The analyses were done using the Flownex thermohydraulic systems CFD simulation software since it is ideally suited for component and system integration. It also enables designers to simulate complex load scenarios and design-suitable controller algorithms. It was therefore possible to investigate control options for one of the most severe load control scenarios, i.e., that of full load rejection due to the loss of the grid power. This paper briefly describes the various control strategies investigated and presents details of the two strategies showing the most promising results with regard to load rejection.

Copyright © 2007 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 14

System power levels—Option 7

Grahic Jump Location
Figure 19

Power turbine speed—Option 7

Grahic Jump Location
Figure 20

Recuperator temperatures—Option 8

Grahic Jump Location
Figure 1

Schematic representation of a high-temperature gas-cooled reactor Brayton cycle

Grahic Jump Location
Figure 2

T-s diagram—PTBP & PTIL

Grahic Jump Location
Figure 3

Power levels—Option 8

Grahic Jump Location
Figure 4

Turbo unit speeds—Option 8

Grahic Jump Location
Figure 5

HP compressor performance—Option 1

Grahic Jump Location
Figure 6

LP compressor performance—Option 1

Grahic Jump Location
Figure 7

Power turbine speed—Option 1

Grahic Jump Location
Figure 8

Recuperator temperatures—Option 1

Grahic Jump Location
Figure 9

Reactor temperatures—Option 1

Grahic Jump Location
Figure 10

Required guide vane angles—Option 2

Grahic Jump Location
Figure 11

Variation in recuperator temperatures—Option 5

Grahic Jump Location
Figure 12

Variation in recuperator inlet temperature—Option 6

Grahic Jump Location
Figure 13

T-s diagram—CPBP with HPBP and LPBP

Grahic Jump Location
Figure 15

Turbo unit shaft speeds—Option 7

Grahic Jump Location
Figure 16

LPC performance—local by-pass valves

Grahic Jump Location
Figure 17

HPC performance—Local HP valve closed, but with the required local LP valve adjusted

Grahic Jump Location
Figure 18

Control strategy—valve opening—Option 8

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In