Requirements for the start-up operations of gas turbine combined cycle (GTCC) power plants have become more diverse and now include such items as reduced start-up time, life consumption, and fuel gas consumption. In this paper, an optimization method is developed to solve these multi-objective problems. The method obtains optimized start-up curves by iterating the search for the optimal combination of the start-up parameter values and the evaluation of multiple objective functions. The start-up curves generated by this method were found to converge near the Pareto-front representing the best trade-off between the fuel gas consumption of the gas turbine (GT) and thermal stress in the steam turbine (ST) rotor which are defined as the objective functions. To demonstrate the effectiveness of the developed method, field tests were performed in a commercial power plant. As a result, the fuel gas consumption of HOT start-up was reduced by 22.8% compared with the past operation data. From this result, the developed method was shown to be capable of optimizing the start-up process for GTCC power plants.
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March 2019
Research-Article
Start-Up Optimization of Combined Cycle Power Plants: A Field Test in a Commercial Power Plant
Yasuhiro Yoshida,
Yasuhiro Yoshida
Research & Development Group,
Hitachi, Ltd.,
7-2-1 Omika-cho,
Hitachi, Ibaraki 319-1221, Japan
e-mail: yasuhiro.yoshida.xb@hitachi.com
Hitachi, Ltd.,
7-2-1 Omika-cho,
Hitachi, Ibaraki 319-1221, Japan
e-mail: yasuhiro.yoshida.xb@hitachi.com
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Takuya Yoshida,
Takuya Yoshida
Research & Development Group,
Hitachi, Ltd.,
7-2-1 Omika-cho,
Hitachi, Ibaraki 319-1221, Japan
e-mail: takuya.yoshida.ru@hitachi.com
Hitachi, Ltd.,
7-2-1 Omika-cho,
Hitachi, Ibaraki 319-1221, Japan
e-mail: takuya.yoshida.ru@hitachi.com
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Yuki Enomoto,
Yuki Enomoto
Steam Turbine Products Headquarters,
Mitsubishi Hitachi Power Systems, Ltd.,
3-3-1 Minatomirai,
Nishi-ku, Yokohama 220-8401, Japan
e-mail: yuki_enomoto@mhps.com
Mitsubishi Hitachi Power Systems, Ltd.,
3-3-1 Minatomirai,
Nishi-ku, Yokohama 220-8401, Japan
e-mail: yuki_enomoto@mhps.com
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Nobuhiro Osaki,
Nobuhiro Osaki
Steam Turbine Products Headquarters,
Mitsubishi Hitachi Power Systems, Ltd.,
3-3-1 Minatomirai,
Nishi-ku, Yokohama 220-8401, Japan
e-mail: nobuhiro_osaki@mhps.com
Mitsubishi Hitachi Power Systems, Ltd.,
3-3-1 Minatomirai,
Nishi-ku, Yokohama 220-8401, Japan
e-mail: nobuhiro_osaki@mhps.com
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Yoshito Nagahama,
Yoshito Nagahama
Steam Turbine Products Headquarters,
Mitsubishi Hitachi Power Systems, Ltd.,
3-3-1 Minatomirai,
Nishi-ku, Yokohama 220-8401, Japan
e-mail: yoshito_nagahama@mhps.com
Mitsubishi Hitachi Power Systems, Ltd.,
3-3-1 Minatomirai,
Nishi-ku, Yokohama 220-8401, Japan
e-mail: yoshito_nagahama@mhps.com
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Yoshifumi Tsuge
Yoshifumi Tsuge
Department of Chemical Engineering,
Kyushu University,
744 Motooka,
Nishi-ku, Fukuoka 819-0395, Japan
e-mail: tsuge@chem-eng.kyushu-u.ac.jp
Kyushu University,
744 Motooka,
Nishi-ku, Fukuoka 819-0395, Japan
e-mail: tsuge@chem-eng.kyushu-u.ac.jp
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Yasuhiro Yoshida
Research & Development Group,
Hitachi, Ltd.,
7-2-1 Omika-cho,
Hitachi, Ibaraki 319-1221, Japan
e-mail: yasuhiro.yoshida.xb@hitachi.com
Hitachi, Ltd.,
7-2-1 Omika-cho,
Hitachi, Ibaraki 319-1221, Japan
e-mail: yasuhiro.yoshida.xb@hitachi.com
Takuya Yoshida
Research & Development Group,
Hitachi, Ltd.,
7-2-1 Omika-cho,
Hitachi, Ibaraki 319-1221, Japan
e-mail: takuya.yoshida.ru@hitachi.com
Hitachi, Ltd.,
7-2-1 Omika-cho,
Hitachi, Ibaraki 319-1221, Japan
e-mail: takuya.yoshida.ru@hitachi.com
Yuki Enomoto
Steam Turbine Products Headquarters,
Mitsubishi Hitachi Power Systems, Ltd.,
3-3-1 Minatomirai,
Nishi-ku, Yokohama 220-8401, Japan
e-mail: yuki_enomoto@mhps.com
Mitsubishi Hitachi Power Systems, Ltd.,
3-3-1 Minatomirai,
Nishi-ku, Yokohama 220-8401, Japan
e-mail: yuki_enomoto@mhps.com
Nobuhiro Osaki
Steam Turbine Products Headquarters,
Mitsubishi Hitachi Power Systems, Ltd.,
3-3-1 Minatomirai,
Nishi-ku, Yokohama 220-8401, Japan
e-mail: nobuhiro_osaki@mhps.com
Mitsubishi Hitachi Power Systems, Ltd.,
3-3-1 Minatomirai,
Nishi-ku, Yokohama 220-8401, Japan
e-mail: nobuhiro_osaki@mhps.com
Yoshito Nagahama
Steam Turbine Products Headquarters,
Mitsubishi Hitachi Power Systems, Ltd.,
3-3-1 Minatomirai,
Nishi-ku, Yokohama 220-8401, Japan
e-mail: yoshito_nagahama@mhps.com
Mitsubishi Hitachi Power Systems, Ltd.,
3-3-1 Minatomirai,
Nishi-ku, Yokohama 220-8401, Japan
e-mail: yoshito_nagahama@mhps.com
Yoshifumi Tsuge
Department of Chemical Engineering,
Kyushu University,
744 Motooka,
Nishi-ku, Fukuoka 819-0395, Japan
e-mail: tsuge@chem-eng.kyushu-u.ac.jp
Kyushu University,
744 Motooka,
Nishi-ku, Fukuoka 819-0395, Japan
e-mail: tsuge@chem-eng.kyushu-u.ac.jp
Manuscript received March 27, 2018; final manuscript received August 31, 2018; published online October 4, 2018. Assoc. Editor: Klaus Dobbeling.
J. Eng. Gas Turbines Power. Mar 2019, 141(3): 031002 (9 pages)
Published Online: October 4, 2018
Article history
Received:
March 27, 2018
Revised:
August 31, 2018
Citation
Yoshida, Y., Yoshida, T., Enomoto, Y., Osaki, N., Nagahama, Y., and Tsuge, Y. (October 4, 2018). "Start-Up Optimization of Combined Cycle Power Plants: A Field Test in a Commercial Power Plant." ASME. J. Eng. Gas Turbines Power. March 2019; 141(3): 031002. https://doi.org/10.1115/1.4041521
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