skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Improvement of thermal efficiency for combined cycle power plant during load following operation

Abstract

An optimization method for unit startup and shutdown timing in the load control system is proposed for combined cycle power plant to improve thermal efficiency during load following operation. The optimum timings are derived from regression equations obtained through off-line dynamics simulation analysis. The system is applied to a simulation for a plant of a three-pressure staged reheat type (1650 MW rated capacity) which consists of seven units, and the following points are seen. (1) The larger the load change amount is, the earlier the recommended additional startup timing is. (2) The tendency described in (1) is more remarkable when the load change is faster. (3) Thermal efficiency is expected to be increased by 9 % compared with the conventional method.

Authors:
;
Publication Date:
Research Org.:
Hitachi Research Lab., Hitachinaka, Ibaraki (JP)
OSTI Identifier:
20001191
Resource Type:
Journal Article
Journal Name:
IEEE Transactions on Energy Conversion (Institute of Electrical and Electronics Engineers)
Additional Journal Information:
Journal Volume: 14; Journal Issue: 3; Other Information: PBD: Sep 1999; Journal ID: ISSN 0018-9383
Country of Publication:
United States
Language:
English
Subject:
29 ENERGY PLANNING AND POLICY; 20 FOSSIL-FUELED POWER PLANTS; COMBINED-CYCLE POWER PLANTS; POWER SYSTEMS; OPERATION; THERMAL EFFICIENCY; START-UP; LOAD ANALYSIS

Citation Formats

Matsumoto, H., and Takahasi, S. Improvement of thermal efficiency for combined cycle power plant during load following operation. United States: N. p., 1999. Web. doi:10.1109/60.790952.
Matsumoto, H., & Takahasi, S. Improvement of thermal efficiency for combined cycle power plant during load following operation. United States. doi:10.1109/60.790952.
Matsumoto, H., and Takahasi, S. Wed . "Improvement of thermal efficiency for combined cycle power plant during load following operation". United States. doi:10.1109/60.790952.
@article{osti_20001191,
title = {Improvement of thermal efficiency for combined cycle power plant during load following operation},
author = {Matsumoto, H. and Takahasi, S.},
abstractNote = {An optimization method for unit startup and shutdown timing in the load control system is proposed for combined cycle power plant to improve thermal efficiency during load following operation. The optimum timings are derived from regression equations obtained through off-line dynamics simulation analysis. The system is applied to a simulation for a plant of a three-pressure staged reheat type (1650 MW rated capacity) which consists of seven units, and the following points are seen. (1) The larger the load change amount is, the earlier the recommended additional startup timing is. (2) The tendency described in (1) is more remarkable when the load change is faster. (3) Thermal efficiency is expected to be increased by 9 % compared with the conventional method.},
doi = {10.1109/60.790952},
journal = {IEEE Transactions on Energy Conversion (Institute of Electrical and Electronics Engineers)},
issn = {0018-9383},
number = 3,
volume = 14,
place = {United States},
year = {1999},
month = {9}
}