Comprehensive algorithm for hydrothermal coordination

Md S. Salam, K. M. Nor, Abdul Razak Hamdan

Research output: Chapter in Book/Report/Conference proceedingChapter

11 Citations (Scopus)

Abstract

The authors present a comprehensive hydrothermal co-ordination algorithm where a new Lagrangian relaxation based hydrothermal co-ordination algorithm is integrated into an expert system. In this algorithm, the problem is decomposed into the scheduling of individual units by relaxing the demand and reserve requirements using Lagrangian multipliers. Dynamic programming is used for solving the thermal subproblems without discretising generation levels. Instead of solving the hydro subproblems independently as in the standard Lagrangian relaxation approach, hydrothermal scheduling is used to solve the output levels of hydro units. Hydrothermal scheduling uses the commitment status of thermal units obtained from the solutions of the thermal subproblems. The expert system takes care of constraints that are difficult or impractical for implementation in the Lagrangian relaxation based hydrothermal co-ordination algorithm, such as cycling of gas and steam turbine units, etc. It is also applied to check the feasibility of the solution. Extensive constraints such as power balance, spinning reserve, minimum up/down time, must run, capacity limits, ramp rate and hydro constraints are considered. Accurate transmission losses are incorporated. Nonlinear cost function is used, and the hydrothermal scheduling is implemented using a fast and efficient algorithm. Numerical results based on a practical utility data show that this new approach provides feasible schedules within a reasonable time.

Original languageEnglish
Title of host publicationIEE Proceedings: Generation, Transmission and Distribution
Pages482-488
Number of pages7
Volume144
Edition5
Publication statusPublished - 1997

Fingerprint

Scheduling
Expert systems
Steam turbines
Dynamic programming
Cost functions
Gas turbines
Hot Temperature

Keywords

  • Hydrothermal co-ordination
  • Hydrothermal scheduling
  • Lagrangian relaxation

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Salam, M. S., Nor, K. M., & Hamdan, A. R. (1997). Comprehensive algorithm for hydrothermal coordination. In IEE Proceedings: Generation, Transmission and Distribution (5 ed., Vol. 144, pp. 482-488)

Comprehensive algorithm for hydrothermal coordination. / Salam, Md S.; Nor, K. M.; Hamdan, Abdul Razak.

IEE Proceedings: Generation, Transmission and Distribution. Vol. 144 5. ed. 1997. p. 482-488.

Research output: Chapter in Book/Report/Conference proceedingChapter

Salam, MS, Nor, KM & Hamdan, AR 1997, Comprehensive algorithm for hydrothermal coordination. in IEE Proceedings: Generation, Transmission and Distribution. 5 edn, vol. 144, pp. 482-488.
Salam MS, Nor KM, Hamdan AR. Comprehensive algorithm for hydrothermal coordination. In IEE Proceedings: Generation, Transmission and Distribution. 5 ed. Vol. 144. 1997. p. 482-488
Salam, Md S. ; Nor, K. M. ; Hamdan, Abdul Razak. / Comprehensive algorithm for hydrothermal coordination. IEE Proceedings: Generation, Transmission and Distribution. Vol. 144 5. ed. 1997. pp. 482-488
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