Weekly scheduling system for electric power generation‐thermal units and pumped storage hydro units operation scheduling

Ohba, Yasuo; Isoda, Hachiro; Kodama, Hiroaki; Sugiyama, Tokio; Nishimori, Toshio

doi:10.1002/eej.4391030617

Cited by 1 publication

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The first method [1,2] is one that is currently in practical use and was constructed by designers, using procedural languages, by consolidating conventional methods into several processing units. This method can be changed to a method using a knowledge base and could be expanded considerably by improving its algorithm.…”

Section: Introductionmentioning

confidence: 99%

A solution to the unit commitment problem considering LNG fuel constraints

et al. 1999

View full text Add to dashboard Cite

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. © 1998 Scripta Technica, Electr Eng Jpn, 125(3): 22–30, 1998

show abstract

Section: Introductionmentioning

confidence: 99%