IMC-Based PID Controller Design for Cascade Control of Superheated Steam Temperature with Frequency Identification

doi:10.11930/j.issn.1004-9649.201703014007

Electric Power ›› 2017, Vol. 50 ›› Issue (11): 15-21.DOI: 10.11930/j.issn.1004-9649.201703014007

• Generation Technology • Previous Articles Next Articles

IMC-Based PID Controller Design for Cascade Control of Superheated Steam Temperature with Frequency Identification

LI Xiaofeng¹, CHEN Guangxue², ZHANG Zhengwei³, WANG Yagang⁴, GAO Ya¹, YOU Yi¹, GU Bochuan¹

1. Electric Power Research Institute of Guangdong Power Group Co., Guangzhou 510080, China;
2. Zhanjiang Electric Power Co., Ltd., Zhanjiang 524099, China;
3. China Resources Power Holdings Co., Ltd., Shenzhen 518001, China;
4. University of Shanghai for Science and Technology, Shanghai 200093, China

Received:2017-04-20 Online:2017-11-29 Published:2017-11-25
Supported by:
This work is supported by National Science Foundation of China under Grants (No. 61074087).

Abstract

Abstract: An IMC-based-PID Controller design method for cascade control of superheated steam temperature through frequency identification is proposed in this paper. In this design method, the process model of superheated steam temperature is identified first. In the identification procedure, the set-point change tests are adopted to calculate the models based on the inputs and outputs of the inner and outer control loops. The process frequency-response matrix is estimated, and then a transform function matrix is obtained by the least squares method. The parameters of the IMC-based PID controller of the SST (steam temperature cascade control loop) are determined by using the internal model control (IMC) and improved SIMC method based on the identified model. It is shown that this strategy achieves better control performance and minimizes the effects of the external or the internal disturbances.

Key words: H-infinity control, closed-loop identification, IMC-PID, cascade control

CLC Number:

TM621

LI Xiaofeng, CHEN Guangxue, ZHANG Zhengwei, WANG Yagang, GAO Ya, YOU Yi, GU Bochuan. IMC-Based PID Controller Design for Cascade Control of Superheated Steam Temperature with Frequency Identification[J]. Electric Power, 2017, 50(11): 15-21.

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IMC-Based PID Controller Design for Cascade Control of Superheated Steam Temperature with Frequency Identification

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