Optimal Scheduling Strategy for Energy Consumption Minimization of Hydro-Thermal Power Systems
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Abstract
A comparison analysis based method for computing the water consumption volume needed for electric energy production of optimal scheduling in hydro-thermal power systems is presented in this paper. The electric energy produced by hydroelectric plants and coal-fired plants is divided into 4 components: potential energy, kinetic energy, water-deep pressure energy and reservoir energy. A new and important concept, reservoir energy, is proposed, based on which is divided into a number of water bodies, for example 3 water bodies, and a reservoir is analyzed in a new way. This paper presents an optimal scheduling solution of elec-tric energy production of hydro-thermal power systems based on multi-factors analytic method, in which some important factors, such as load demand, reservoir in-flow, water consumption volume increment rate of hydroelectric plants or converted from coal-fired plants, and so on are given to model the objective function and the constraints. A study example with three simulation cases is carried out to illustrate flexibility, adapta-bility, applicability of the proposed method.
- Fleten S. E., Wallace S. W., and Ziemba W. T., "Portfolio management in a deregulated hydropower based electricity market," In Proceedings of the 3rd International Conference on Hydropower Development, pp. 197-204, 1997.
- Fleten S. E., Wallace S. W., and Ziemba W. T., "Hedging electricity portfolios via stochastic programming," IMA volumes on Mathematics and Its Applications, Vol. 128, pp. 71-93, 2002.
- Ilyas Eker, "The design of robust multi-loop-cascaded hydro governors," Engineering Computer, Vol. 20, No. 2, pp. 45-53, 2004.
- Wallace S. W. and Fleten S. E., "Stochastic programming models in energy," The series Handbooks in Operations Research and Management Science, Vol. 10, pp. 637-677, 2003.
- Guan X., Svoboda A., and Li C. A., "Scheduling hydro power systems with restricted operating zones and discharge ramping constraints," IEEE Transactions on Power System, Vol.14, No.1, pp. 126-131, 1999.
- Yang J. S., and Chen N, "Short term hydrothermal coordination using multipass dynamic programming," IEEE Transactions on Power System, Vol. 4, No. 3, pp. 1050-1056, 1989.
- Li C., Jap P., and Streiffert D, "Implementation of network flow programming to the hydrothermal coordination in an energy management system," IEEE Transactions on Power System, Vol. 8, No. 3, pp. 1045-1053, 1993.
- Rosenthal R. E., "A nonlinear network flow algorithm for maximization of benefits in a hydroelectric power system," Operation Research, Vol. 29, No. 4, pp. 763-786, 1981.
- Chang G. W., Aganagic M., Waight J. G., et al., "Experiences with mixed integer linear programming based approaches on short-term hydro scheduling," IEEE Transactions on Power Systems, Vol. 16, No. 4, pp. 743-749, 2001.
- Conejo A. J., Arroyo J. M., Contreras J., et al., "Self-scheduling of a hydro producer in a pool-based electricity market," IEEE Transactions on Power System, Vol. 17, No. 4, pp. 1265-1272, 2002.
- Chang G., Mohamed Aganagic W, Waight James G, et al., "Experiences with mixed integer linear programming based approaches on short-term hydro scheduling," IEEE Transactions on Power System, Vol. 16, No. 4, pp. 743-749, 2001.
- Nilsson O. and Sjelvgren D., "Mixed integer programming applied to short-term planning of a hydro-thermal system," IEEE Transactions on Power System, Vol. 11, No. 1, pp. 281-286, 1996.
- Sinha N., Chakrabarti R., and Chattopadhyay P. K., "Fast evolutionary programming techniques for short-term hydrothermal scheduling," Electric Power Systems Research, Vol. 66, pp. 97-103, 2003.