Optimization of Real‐Time Hydrothermal System Operation
Publication: Journal of Water Resources Planning and Management
Volume 118, Issue 6
Abstract
A procedure for the economic optimization of hydrothermal power systems operation has been developed. The procedure is suitable for on‐line system utilization on a daily basis. To alleviate the inherent high dimensionality of the optimization problem, a time decomposition is used. The weekly and daily cyclic nature of load demand makes it convenient to specify operational periods in terms of weeks, days, and hours. A set of three models, i.e., monthly (four weeks), daily, and hourly, is developed. The three individual models are coupled to perform an overall optimization. A feedback mechanism is developed through the periodic monitoring of system states and the updating of the higher‐level models with a periodicity corresponding to the normal periods of the particular model. The procedure considers the seasonal variations of inflow to the system reservoirs, the variation of transmission losses with hydro and thermal plant loadings, and thermal unit commitment and dispatch. Application is made to a moderately sized hydro‐thermal system in the People's Republic of China. It was shown that the developed procedure is feasible and practical for on‐line daily operations. Significant reductions in the operating costs for the Chinese system have been obtained.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Agarwal, S. K., and Nagrath, I. J. (1972). “Optimum scheduling of hydrothermal systems.” Proc., IEE, 119(2), 169–173.
2.
Agarwal, S. K. (1973). “Optimal stochastic scheduling of hydrothermal systems.” Proc., IEE, 120(6), 674–678.
3.
Becker, L., and Yeh, W. W.‐G. (1974). “Optimization of real time operations of a multiple reservoir system.” Water Resour. Res., 10(6), 1107–1112.
4.
Becker, L., Yeh, W. W.‐G., Fults, D., and Sparks, D. (1976). “Operations models for Central Valley Project.” J. Water Resour. Planning and Mgmt. Div., ASCE, 102(1), 101–115.
5.
Bernholtz, B., and Graham, L. J. (1962). “Hydrothermal economic scheduling.” Power Apparatus and Systems, 58(Feb.), 1089–1107.
6.
Bonaert, A. P., Ei‐Abiad, A. H., and Koiva, A. J. (1972a). “Optimum scheduling of hydrothermal power systems.” IEEE Trans., PAS‐91(1), 263–270.
7.
Bonaert, A. P., El‐Abiad, A. H., and Koivo, A. J. (1972b). “Effects of hydrodynamics on optimum scheduling of thermo‐hydro power systems.” IEEE Trans., PAS‐91(4), 1412–1419.
8.
Drake, J. H., Kirchmayer, L. K., Mayall, R. B., and Wood, H. (1962). “Optimum operation of a hydrothermal system.” AIEE Trans., PAS‐61(Aug.), 242–250.
9.
Grygier, J. C., and Stedinger, J. R. (1985). “Algorithm for optimizing hydropower system operations.” Water Resour. Res., 21(1), 1–10.
10.
Happ, H. H., Johnson, R. C., and Wright, W. J. (1971). “Large scale hydro‐thermal unit commitment—method and results.” IEEE Trans., PAS‐90(3), 1373–1384.
11.
Happ, H. H. (1977). “Optimal power dispatch—a comprehensive survey.” IEEE Trans., PAS‐96(3), 841–854.
12.
Hara, K., Kimura, M., and Honda, N. (1966). “A method for planning economic unit commitment and maintenance of thermal power systems.” IEEE Trans., PAS‐85(5), 427–436.
13.
Kerr, R. H., Scheidt, J. L., Fontana, A. J., Jr., and Wiley, J. K. (1966). “Unit commitment.” IEEE Trans., PAS‐85(5), 417–421.
14.
Kirchmayer, L. K. (1958). Economic operation of power systems. John Wiley and Sons., New York, N.Y.
15.
Lowery, P. G. (1966). “Germinating unit commitment by dynamic programming.” IEEE Trans., PAS‐85(5), 422–426.
16.
Marino, M. A., and Mohammadi, B. (1983). “Reservoir operation by linear and dynamic programming.” J. Water Resour. Planning and Mgmt., ASCE, 109(4), 303–319.
17.
Nabona, N., and Freris, L. L. (1973). “Optimization of economic dispatch through quadratic and linear programming.” Proc., IEEE, 120(5), 574–580.
18.
Pereira, M. F. V., and Pinto, L. M. V. G. (1985). “Stochastic optimization of a multireservoir hydroelectric system: A decomposition approach.” Water Resour. Res., 21(6), 779–792.
19.
Podmore, R. (1973). “A simplified land improved method for calculating transmission loss formula.” Proc., 8th Power Industry Computer Applications Conf., IEEE, New York, N.Y., 433–440.
20.
“Power system planning and operations—future problems and research needs.” (1977). Special Report EL‐377SR, Engineering Foundation Conference, Electric Power Research Institute (EPRI), Palo Alto, Calif.
21.
“Present practices in economic operation of power systems.” (1971). IEEE Trans., PAS‐90(4), 1768–1775.
22.
Ramamoorty, M., and Rao, J. G. (1970). “Load scheduling of hydroelectric thermal generating systems using nonlinear programming techniques.” Proc., IEE, 117(4), 794–798.
23.
Rees, F. J., and Larson, R. E. (1971). “Computer‐aided dispatching and operations planning for an electric utility with multiple types of generation.” IEEE Trans., PAS‐90(2), 891–899.
24.
Shane, R. M., and Gilbert, K. C. (1980). “Weekly time step reservoir system scheduling model.” TVA Report, Water Systems Development Branch, Tennessee Valley Authority (TVA), Norris, Tenn.
25.
Soares, S., Lyra, C., and Tavares, H. (1980). “Optimal generation scheduling of hydrothermal power systems.” IEEE Trans., PAS‐99(3), 1107–1115.
26.
Stevenson, W. D., Jr. (1982). “Elements of power system analysis.” Economic operation of power systems. McGraw‐Hill, Book Co., Inc., New York, N.Y.
27.
Yeh, W. W.‐G., Becker, L., and Chu, W. S. (1979). “Real‐time hourly reservoir operation.” J. Water Resour. Planning and Mgmt. Div., ASCE, 105(2), 187–203.
28.
Yeh, W. W.‐G., and Becker, L. (1983). “Economic optimization of hydrothermal power system operations.” UERG Energy Science and Tech. Report, UER‐114, University of California, Berkeley, Calif.
29.
Yeh, W. W.‐G. (1986). “Reservoir management and operation models: A state‐of‐the‐art review.” Water Resour. Res., 21(12), 1797–1818.
Information & Authors
Information
Published In
Journal of Water Resources Planning and Management
Volume 118 • Issue 6 • November 1992
Pages: 636 - 653
Copyright
Copyright © 1992 ASCE.
History
Published online: Nov 1, 1992
Published in print: Nov 1992
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.