Study on Simplified Nonlinear Model of 600-MW Supercritical Units

doi:10.11930/j.issn.1004-9649.2013.8.98.6

Abstract

Abstract: So far, in most studies, the supercritical unit is simply modeled in the form of transfer function matrix, from which the dynamic characteristics of other internal parameters cannot be observed. In this paper, the simplified nonlinear model of a 600-MW supercritical unit is established with the combination of mechanism analysis and parameter identification method. The dynamic and static parameters of the model are determined based on the data obtained from load variation test of one 600-MW“W” flame supercritical once-through boiler unit. Comparison between the Simulink simulation results and actual operation curves shows that the new model reflects the nonlinear dynamic characteristics of the unit well and can be used to study the coordinated control strategy and dynamic characteristic analysis for the supercritical units with “W” flame furnace. By modifying some parameters, the model can be used for research on other related aspects of supercritical units as well.

Key words: 600 MW, supercritical unit, nonlinear model, coordinated control system

CLC Number:

TK323

LIU You-kuan, LIU Chang-liang, ZHAO Yong-hui. Study on Simplified Nonlinear Model of 600-MW Supercritical Units[J]. Electric Power, 2013, 46(8): 98-104.

Add to citation manager EndNote|Ris|BibTeX

URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2013.8.98.6

https://www.electricpower.com.cn/EN/Y2013/V46/I8/98

References

[1] De. MELLO F P. Boiler models for system performance studies [J]. IEEE Transactions on Power Systems, 1991, 6(1): 66-74.
[2] Aström KJ Bell R D. Drum-boiler dynamics [J]. Automatica, 2000(36): 363-378.
[3] 田亮,曾德亮,刘吉臻,等. 简化的330 MW机组非线性动态模型[J]. 中国电机工程学报,2004,24（8）：522-525.
TIAN Liang, ZENG De-liang, LIU Ji-zhen, et al . A simplified non-linear dynamic model of 330 MW unit [J]. Proceeding of the CSEE, 2004, 24(8): 522-525.
[4] 曾德良,赵征,陈彦桥,等. 500 MW机组锅炉模型及实验分析[J]. 中国电机工程学报,2003,23（5）：149-152.
ZENG De-liang, ZHAO Zheng, CHEN Yan-qiao, et al . A practical 500 MW boiler dynamic model analysis [J]. Proceeding of the CSEE, 2003, 23(5): 149-152.
[5] 马王鹏. 超临界600 MW机组W火焰锅炉的特点[J]. 华电技术,2009,31（5）：22-23.
MA Wang-peng. Analysis on characteristics of W-shaped flame boiler for super critical 600 MW unit[J]. Huadian Technology, 2009, 31(5): 22-23.
[6] 闫珠,曾德良,刘吉臻,等. 直流炉机组简化非线性模型及仿真应用[J]. 中国电机工程学报,2012,32（11）：127-134.
YAN Zhu, ZENG De-liang, LIU Ji-zhen, et al . A simplified non- linear model of a once-through boiler-turbine unit and its application [J]. Proceeding of the CSEE, 2012, 32(11): 127-134.
[7] 钱庆生. 600 MW超临界机组控制系统特点与协调控制策略[J]. 热电技术,2008,2（98）：53-56.
[8] 梁庆姣,刘吉臻,薛彦广,等. 超超临界机组的非线性模型及动态特性研究[J]. 动力工程学报,2012,32（2）：118-123.
LIANG Qing-jiao, LIU Ji-zhen, XUE Yan-guang, et al . A non- linear model for ultra-supercritical power unit and the dynamic characteristic study[J]. Journal of Chinese Society of Power Engineering, 2012, 32(2): 118-123.
[9] 王恭良,沈炯,李益国,等. 适用于控制的600 MW超临界机组的简化模型[J]. 江苏电机工程,2008,27（4）：1-7.
WANG Gong-liang, SHEN Jiong, LI Yi-guo, et al . A simplified model for the control of 600 MW supercritical unit[J]. Jiangsu Electrical Engineering, 2008, 27(4): 1-7.
[10] 何钧,刘宝玲. 超临界600 MW机组协调控制策略优化[J]. 电站系统工程,2012,28（6）：68-70.
HE Jun, LIU Bao-ling. Optimization of coordinated control system for supercritical 600 MW unit[J]. Power System Engineering, 2012, 28(6): 68-70.
[11] 田新首,石岩. 火电单元机组数学模型的参数估计方法与稳定性分析研究[J]. 华北水利水电学院学报,2012,32（4）：61-64.
TIAN Xin-shou, SHI Yan. Research on parameter estimation and stability analysis of mathematical model for thermal power unit [J]. Journal of North China Institute of Water Conservancy and Hydroelectric Power, 2012, 32(4): 61-64.
[12] 张二辉. 煤质自适应的大型CFB机组AGC控制策略研究[D].河北保定：华北电力大学,2009.
[13] 俞成立. 超（超）临界机组中间点温度过热度控制策略[J]. 中国电力,2008, 41（7）：60-63.
YU Cheng-li. Control strategies for the superheat degree of intermediate point temperature in ultra-supercritical power unites [J]. Electric Power, 2008, 41(7): 60-63.
[14] 尹峰. 超（超）临界机组主汽温控制系统控制传递策略研究与应用[J]. 华东电力,2009,37（4）：644-647.
YIN Feng. Research and application of control transferring strategies for main steam temperature control in(ultra) supercritical units[J]. East China Electric Power, 2009, 37(4): 644-647.
[15] 韩忠旭,潘刚,邱忠昌,等. 直流炉机组给水控制系统的设计与应用[J]. 中国电机工程学报,2010,30（12）：7-16.
HAN Zhong-xu, PAN Gang, QIU Zhong-chang, et al . Design and application of feed water control system for once-through boiler power generation unit [J]. Proceeding of the CSEE, 2010, 30(12): 7-16.
[16] 田新首,韩忠旭,陈利杰,等. 超临界机组非线性模型参数估计与平衡点分析[J]. 计算机仿真,2011,28（1）：20-23.
TIAN Xin-shou, HAN Zhong-xu, CHEN Li-jie, et al . Parameter estimation and equilibrium points analysis on non-linear model of the supercritical unit [J]. Computer Simulation, 2011, 28(1): 20-23.
[17] 邓拓宇,田亮,刘吉臻. 超超临界直流锅炉蓄热能力的定量分析[J]. 动力工程学报,2012,32（1）：10-14.
DENG Tuo-yu, TIAN Liang, LIU Ji-zhen. Quantitative analysis on heat storage capacity of ultra-supercritical once-through boilers [J]. Journal of Chinese Society of Power Engineering, 2012, 32(1): 10-14.
[18] 杨启平,邓正文,董辉,等. 基于最小二乘法的电力变压器参数辨识算法[J]. 上海电力学院学报,2012,28（5）：401-405.
YANG Qi-ping, DENG Zheng-wen, DONG Hui, et al . Electric power transformer parameter identification algorithm based on least square method [J]. Journal of Shanghai University of Electric Power, 2012, 28(5): 401-405.
[19] 王印松,张彩. 热工模型中纯迟延时间的递归估计算法[J]. 电力系统及其自动化学报,2007,19（1）：112-116.
WANG Yin-song, ZHANG Cai. Recursive estimation algorithm for calculating time delay in thermodynamic process [J]. Proceedings of the CSU-EPSA, 2007, 19(1): 112-116.