DocumentCode :
2198149
Title :
Unit commitment based on modified unit decommitment method
Author :
Hu, Feixiong ; Yan, Zheng ; Ni, Yixin ; Chen, Shousun ; Wu, Felix
Author_Institution :
Dept. of Electr. Eng., Tsinghua Univ., Beijing, China
fYear :
2004
fDate :
10-10 June 2004
Firstpage :
1150
Abstract :
A modified unit decommitment method is proposed for unit commitment. The algorithm starts with the initial solution where all the available units are on stream. One and only one unit schedule optimization is made in each iteration to minimize the power production (or purchasing) cost in conventional (or market) environment. The iteration continues till two consecutive iterations give the identical solution or the value of the objective function cannot be further improved. A noticeable advantage of the new method is that all the intermediate solutions during the iterations retain the feasibility. In the single-unit optimization process, minimum up and down time constraints are considered through a novel approach so that the number of feasible solutions can be reduced significantly. The mathematical models for UC under both traditional and market environments are presented together with the suggested algorithm and solution procedure. The constraints of power balance, spinning-reserve request, minimum up and down time, generation capacity and the ramp rate are all considered. Computer test results for a 20-unit system and a 110-unit system are presented to show the effectiveness of the proposed approach.
Keywords :
iterative methods; optimisation; power engineering computing; power generation scheduling; power markets; 110-unit system; generation capacity; modified unit decommitment method; power balance; power markets; power production; spinning-reserve request; unit schedule optimization; Constraint optimization; Cost function; Dynamic programming; Job shop scheduling; Lagrangian functions; Optimal scheduling; Power generation; Power system planning; Production; Relaxation methods;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Power Engineering Society General Meeting, 2004. IEEE
Conference_Location :
Denver, CO
Print_ISBN :
0-7803-8465-2
Type :
conf
DOI :
10.1109/PES.2004.1373029
Filename :
1373029
Link To Document :
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