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Title:
SELF-ORDER-REDUCING MULTI-LOOP CENTRALIZED PREDICTION CONTROL SYSTEM FOR REHEAT STEAM TEMPERATURE OF DOUBLE REHEAT UNIT
Document Type and Number:
WIPO Patent Application WO/2019/085446
Kind Code:
A1
Abstract:
Disclosed is a self-order-reducing multi-loop centralized prediction control system for a reheat steam temperature of a double reheat unit. The control system is composed of a flue gas recirculation fan rotation speed control loop and a flue gas damper plate opening control loop. The deviations between a single reheat steam temperature and a set value and between a double reheat steam temperature and a set value are sent to a prediction controller to obtain optimal values for a flue gas recirculation fan rotation speed and a flue gas damper plate opening by means of calculation, so as to ensure that the single reheat steam temperature and the double reheat steam temperature of a unit are kept in a rational and safe range. In the present invention, by using prediction control, the problem of the optimization of a great-inertia multi-variable system can be conveniently solved, and a calculation process is clear and simple; during engineering application, programming is convenient to implement, and by means of the prediction of a future output deviation, a corresponding control quantity can be adjusted in a timely manner; and a single reheat steam temperature and a double reheat steam temperature can be stabilized in a rational range, so that the stability and safety of a unit are ensured, and the control effect is better than that of traditional PID control.

Inventors:
CAI, Rongyu (No. 2, Southeast University Road Jiangning Distric, Nanjing Jiangsu 9, 211189, CN)
LV, Jianhong (No. 2, Southeast University Road Jiangning Distric, Nanjing Jiangsu 9, 211189, CN)
YU, Ji (No. 2, Southeast University Road Jiangning Distric, Nanjing Jiangsu 9, 211189, CN)
Application Number:
CN2018/088141
Publication Date:
May 09, 2019
Filing Date:
May 24, 2018
Export Citation:
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Assignee:
SOUTHEAST UNIVERSITY (No. 2, Southeast University Road Jiangning Distric, Nanjing Jiangsu 9, 211189, CN)
International Classes:
G05B13/04; F22G5/06; F23J15/00
Attorney, Agent or Firm:
NANJING RUIHONG PATENT & TRADEMARK AGENCY (ORDINARY PARTNERSHIP) (Room 411, Building 3 No. 155 Long Pan Road, Xuanwu Distric, Nanjing Jiangsu 0, 210000, CN)
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