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A solution to the unit commitment problem considering LNG fuel constraints

✍ Scribed by Takeshi Nagata; Hiroshi Sasaki; Hanzheng Duo; Hideki Fujita; Toshiaki Takayama

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
176 KB
Volume
125
Category
Article
ISSN
0424-7760

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✦ Synopsis

In this paper, an algorithm is proposed for finding a quasi-optimal schedule for the short-term thermal unit commitment problem taking LNG fuel constraints into account.

In recent years, LNG fuel has been used increasingly. As a result, LNG fuel constraints should be considered in making a unit commitment schedule. Generally, unit commitment is a nonlinear combinatorial problem including discrete variables. To solve the problem, a two-step algorithm is developed using mathematical programming methods. First a linear programming problem is solved to determine the amount of LNG fuel to be consumed by each LNG unit, then a Lagrangian relaxation approach is used to obtain a unit commitment schedule. This two-step algorithm simplifies the problem and thus has good convergence characteristics.

To test the effectiveness of the proposed algorithm, a numerical simulation was carried out on a 46-unit thermal system over a 24-hour period. A result with a dual gap of 0.00546 was obtained.

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✍ Perdue, Adoline S. ;Bell, Frances ;Starnes, W.R. ;Hitchcock, Philip ;Teague, R.S πŸ“‚ Article πŸ“… 1950 πŸ› Elsevier βš– 346 KB πŸ‘ 1 views