Information Technology Reference
In-Depth Information
Application of Multivariable Model Prediction
Control to Ultra-supercritical Unit
Shihe Chen
1
,XiZhang
1
,
, Guoliang Wang
2
,
3
,andWeiwuYan
2
,
3
1
Guangdong Electric Power Research Institute, Guangzhou 510600
2
Department of Automation, Shanghai Jiao Tong University, Shanghai, 200240
3
Key Laboratory of System Control and Information Processing,
Ministry of Education of China, Shanghai, 200240
zhangx.sjtu@gmail.com, yanwwsjtu@sjtu.edu.cn
Abstract.
In this paper, development of ultra supercritical unit con-
trol is summarized. Based on analyzing the control diculties and the
input-output relationship of Ultra-supercritical Units, a model predic-
tive control scheme for Ultra-supercritical Unit is proposed. The input
variables are fuel flow, turbine valve opening and water flow and output
variables are load, steam temperatureteam pressure. The algorithm and
implementation method are also given in details.
Keywords:
Ultra-supercritical units, Multivariable Model Predictive
Control.
1 Introduction
Electric power is mainly generated by coal power plant due to the primary en-
ergy structure in China. According to the electric power development plan of
2020, Chinese installed generating capacity will increase from the current 0.8
billion kilowatts to 0.9 billion kilowatts in 2020, among which coal power plants
take up 75% of the total capacity. As the biggest consuming customer of coal,
electric power industry should improve utilization eciency of coal as well as
enhance the production eciency of coal power plant to adapt to the future
requirement of energy saving, emission reduction, low-carbon and sustainable
development. The international coal-fired power-generating technology has two
developing tendencies. With the mature coal gasification technology in coal
chemical industry, the first one uses the integrated gasification combined cy-
cle (IGCC) technology to realize high-eciency low polluting power generation.
The other one improves eciency through increasing the steam parameter of con-
ventional power-generating sets, which means using the supercritical units and
ultra-supercritical units. The higher the steam parameters of ultra-supercritical
units are, the higher the thermal eciency is. The main steam pressure of ultra-
supercritical units is 25 31MPa, while the temperature of main steam and re-
heated steam is 580 610. Not only 2% 3% higher than the thermal eciency of
This research was supported by National Natural Science Foundation of China
(Grant Number: 60974119).
Search WWH ::
Custom Search