Dynamic model for controller design of condensate throttling systems

Yong Hu; De-Liang Zeng; Ji-Zhen Liu; Zheng Zhao; Ya-zhe Li

doi:10.1016/j.isatra.2015.07.002

Dynamic model for controller design of condensate throttling systems

ISA Trans. 2015 Sep:58:622-8. doi: 10.1016/j.isatra.2015.07.002. Epub 2015 Jul 20.

Authors

Yong Hu¹, De-Liang Zeng², Ji-Zhen Liu², Zheng Zhao², Ya-zhe Li²

Affiliations

¹ The State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China. Electronic address: ncepu_hu@yahoo.com.
² The State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China.

PMID: 26206068
DOI: 10.1016/j.isatra.2015.07.002

Abstract

Improving the load adjustment rate of coal-fired power plants in China is very important because of grid load fluctuations and the construction of new large-scale power plants connected to the country's power grid. In this paper, a new application of condensate throttling system for rapid load adjustment is proposed on the basis of the characteristics of turbine-stored energy. To ensure effective and safe operation of the condensate throttling system, a non-linear control model is derived through reasonable simplifications of fundamental physical laws, and the model parameters are identified using experimental data from a 660 MW supercritical coal-fired power plant. The model outputs are compared with actual measured data for different unit loads. Results show that the established model's responses strongly correlate with the actual unit's responses and can be used for controller design.

Keywords: Condensate throttling; Non-linear model; Rapid load adjustment.

Publication types

Research Support, Non-U.S. Gov't