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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 (CN)
LV JIANHONG (CN)
YU JI (CN)
Application Number:
CN2018/088141
Publication Date:
May 09, 2019
Filing Date:
May 24, 2018
Export Citation:
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Assignee:
UNIV SOUTHEAST (211189, CN)
International Classes:
G05B13/04; F22G5/06; F23J15/00
Foreign References:
CN107908106A2018-04-13
CN106871097A2017-06-20
CN102566433A2012-07-11
CN106642069A2017-05-10
JP2000257801A2000-09-22
JPH10301916A1998-11-13
Attorney, Agent or Firm:
NANJING RUIHONG PATENT & TRADEMARK AGENCY (ORDINARY PARTNERSHIP) (210000, CN)
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