A coordinated MIMO control design for a power plant using improved sliding mode controller

被引:22
作者
Ataei, Mohammad [1 ]
Hooshmand, Rahmat-Allah [1 ]
Samani, Siavash Golmohammadi [1 ]
机构
[1] Univ Isfahan, Fac Engn, Dept Elect Engn, Esfahan 8174673441, Iran
关键词
Steam power plant; Boiler-turbine system; Sliding mode control; Throttle steam pressure; PREDICTIVE CONTROL; BOILER; SYSTEM;
D O I
10.1016/j.isatra.2013.09.015
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
For the participation of the steam power plants in regulating the network frequency, boilers and turbines should be co-ordinately controlled in addition to the base load productions. Lack of coordinated control over boiler-turbine may lead to instability; oscillation in producing power and boiler parameters; reduction in the reliability of the unit; and inflicting thermodynamic tension on devices. This paper proposes a boiler-turbine coordinated multivariable control system based on improved sliding mode controller (ISMC). The system controls two main boiler-turbine parameters i.e., the turbine revolution and superheated steam pressure of the boiler output. For this purpose, a comprehensive model of the system including complete and exact description of the subsystems is extracted. The parameters of this model are determined according to our case study that is the 320 MW unit of Islam-Abad power plant in Isfahan/Iran. The ISMC method is simulated on the power plant and its performance is compared with the related real PI (proportional-integral) controllers which have been used in this unit. The simulation results show the capability of the proposed controller system in controlling local network frequency and superheated steam pressure in the presence of load variations and disturbances of boiler. (C) 2013 ISA. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:415 / 422
页数:8
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