Systems modelling of a coal-based steam power plant

Abstract

A power plant manager has to minimize operation and maintenance (O&M) expenses while ensuring the reliability, safety, and security of supply in order to remain competitive in the global market. The performance of a steam power plant (SPP) is a function of its basic structure (i.e., layout and design), availability (maintenance aspects), operation efficiency (trained manpower), safety and security, and other regulatory aspects. Understanding of its structure will help in the improvement of performance, design, maintenance planning, and so on. A mathematical model using the graph theory and matrix method is developed to evaluate the performance of a coal-based SPP. Detailed methodology for developing a system structure graph (SSG), various system structure matrices, and their permanent functions are described for the boiler of an SPP (a macro level system). Structural interconnections between six systems of boiler are considered for developing an SSG of a boiler. To carry out complete structural modelling and analyses of the boiler, system structure graphs of its six systems and their subsystems are presented. A top-down approach for complete analysis of any system is also given.

This method can be extended further for modelling a complete SPP by incorporating a turbogenerator macro system and its subsystems, thus converting real-life SPP from a block diagram into a mathematical model for analysis and synthesis of a power plant from different perspectives.

Keywords

coal-based SPP system structure graph theory matrix approach

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References

Conway

Martin

H. F.

Stock

A. L.

Vaccaro

F. R.

A ruggerized design approach to reduce maintenance and enhance the efficiency of high and intermediate pressure steam turbines. Trans ASME, J. Engng Gas Turbines and Power, 1989, 111, 619–625.

Goode

K. B.

Moore

Roylance

B. J.

Plant machinery working life prediction method utilising reliability and condition monitoring data. Proc. Instn Mech. Engrs, Part E. J. Process Mechanical Engineering, 2000, 214, 109–122.

Bradt

Use of reliability, availability and maintainability techniques to optimise system operation. Hydrocarbon Process, 1997, 76, 63–65.

www.powertech.co.uk/proates/conventional.htm (Accessed May 2002).

Performance review of thermal power stations 1996-97. Report No. CEA/G and O/PM/21st Issue. CEA, Government of India, New Delhi.

Keller

R. W.

Koppe

R. H.

Van Howe

K. R.

Stoller

S. M.

A power plant availability improvement methodology based on the new NERC generating availability data system (GADS). IEEE Trans Power Appraisals and System, 1982, 8, 2537–2542.

Definitions and methods of calculation of availability and unavailability factors. Report of Joint UNIPEDE/WEC Committee on Availability of Thermal Generating Plants, London, Oct. 1991, p. 17.

Trimm

V. D.

Environmental consideration for UK steam plant in the 1990sâa manufacturer's view. Proc. Instn Mech. Engrs, Part A: J. Power and Energy, 205, 111–121.

Robson

Turner

W. J.

Environmental economics and electricity generation. Proc. Instn Mech. Engrs, Part A: J. Power and Energy, 208, 177–189.

10.

Sacks

I. J.

Ashmore

B. C.

Alesso

H. P.

Systems interaction results from the digraph matrix analysis of Watts bar nuclear power plant high pressure safety injection systems. Lawrence Livermore National Laboratory, Livermore, USA, Report No. UCRL-53467, Vol. 1 and 2, July 1983, pp. 13–63.

11.

Gandhi

O. P.

Agrawal

V. P.

Shishodia

K. S.

Reliability analysis and evaluation of systems. Reliability Engng System Safety, 1991, 32, 283–305.

12.

Gandhi

O. P.

Agrawal

V. P.

Failure cause analysisâ A structural approach. J. Pressure Vessel Technol Trans ASME, 1996, 118, 434–440.

13.

Wani

M. F.

Gandhi

O. P.

Development of maintainability index for mechanical systems. Reliability Engng System Safety, 1999, 65, 259–270.

14.

Sehgal

Gandhi

O. P.

Angra

Reliability evaluation and selection of rolling element bearings. Reliability Engng System Safety, 2000, 68, 39–52.

15.

Deo

Graph Theory, 1974 (Prentice-Hall, Englewood Cliffs, NJ, USA).

16.

Harary

Graph Theory, 1969 (Addison-Wesley, Reading, Mass, USA).