MPC Applications in AGC CCS and Steam Temperature Control on Two Ultra-supercritical Coal-fired Power Generation Units

doi:10.11930/j.issn.1004-9649.201711202

Electric Power ›› 2018, Vol. 51 ›› Issue (7): 68-77.DOI: 10.11930/j.issn.1004-9649.201711202

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MPC Applications in AGC CCS and Steam Temperature Control on Two Ultra-supercritical Coal-fired Power Generation Units

CAI Lijun¹, ZHU Yucai², LV Xia³, WU Zhen¹, JIANG Pengfei², ZHAO Chao³, ZHANG Kangkang², GAO Xing¹

1. Inner Mongolian Bulian Power Plant, China Guodian Corporation, Ejin Horo Banner 017209, China;
2. College of Control Science and Technology, Zhejiang University, Hangzhou 310027, China;
3. Yantai Longyuan Electrical Power Technology Limited, Yantai 264006, China

Received:2017-12-01 Revised:2018-03-11 Online:2018-07-05 Published:2018-07-31
Supported by:
This work is supported by the National Key Research and Development Program (No. 2017YFA0700303) and National Natural Science Foundation of China (No.61273191).

Abstract

Abstract: In this paper, based on the introduced model predictive control (MPC) technology, the scheme of MPC-based coordinated control system (CCS) and main steam temperature control system is proposed and applied on two ultra-supercritical coal fired power generation units. The comparison between the results of MPC- and PID-based controls shows that the MPC controller can increase the load control accuracy, load variation rate as well as the unit maximum generation, and lower the control error of main steam pressure. The MPC system has been successfully in operation for ten months, which makes the power grid evaluation scores of the two units to be improved considerably, that is, the K_p values have been increased from 1.5 to 2.8 and 3.5 respectively; the rank of the power plant has been increased from medium level to the second (out of 47 power plants) in the local power grid.

Key words: coal fired power plant, coordinated control system (CCS), main steam temperature control, model predictive control (MPC), closed-loop identification

CLC Number:

TK223.7

CAI Lijun, ZHU Yucai, LV Xia, WU Zhen, JIANG Pengfei, ZHAO Chao, ZHANG Kangkang, GAO Xing. MPC Applications in AGC CCS and Steam Temperature Control on Two Ultra-supercritical Coal-fired Power Generation Units[J]. Electric Power, 2018, 51(7): 68-77.

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MPC Applications in AGC CCS and Steam Temperature Control on Two Ultra-supercritical Coal-fired Power Generation Units

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