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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received October 10, 2007
Accepted February 5, 2008

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Model predictive control of condensate recycle process in a cogeneration power station: Controller design and numerical application

Wangyun Won Kwang Soon Lee^† In Seop Kim Bongkook Lee¹ Seungjoo Lee¹ Seokyoung Lee²

Department of Chemical and Biomolecular Engineering, Sogang University, Shinsoodong-1, Mapogu, Seoul 121-742, Korea ¹LS Industrial System Co., Ltd., Anyang, Gyeonggido 431-749, Korea ²East-West Power Co., Ltd., Goyang, Gyeonggido 410-771, Korea

kslee@sogang.ac.kr

Korean Journal of Chemical Engineering, September 2008, 25(5), 972-979(8), 10.1007/s11814-008-0157-4

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Abstract

Abstract.A model predictive control (MPC) system has been developed for application to the condensate recycle process of a 300 MW cogeneration power station of the East-West Power Plant, Gyeonggido, Korea. Unlike other industrial processes where MPC has been predominantly applied, the operation mode of the cogeneration power station changes continuously with weather and seasonal conditions. Such characteristic makes it difficult to find the process model for controller design through identification. To overcome the difficulty, process models for MPC design were derived for each operation mode from the material balance applied to the pipeline network around the concerned process. The MPC algorithm has been developed so that the controller tuning is easy with one tuning knob for each output and the constrained optimization is solved by an interior-point method. For verification of the MPC system before process implementation, a process simulator was also developed. Performance of the MPC was investigated first with a process simulator against various disturbance scenarios.

Keywords

Cogeneration Power Station Control Level Control MPC

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