Research on and Application of the Control Strategy for Flexibility Improvement of Supercritical Fossil-Fired Power Units

doi:10.11930/j.issn.1004-9649.2017.08.022.05

Abstract

Abstract: Along with the increasing of new energy generation projects and long distance power supply volume beyond the area, the power supply structure of power grids has undergone fundamental changes, which brings about growing pressure on peak load regulation. Therefore, the modification on the flexibility of automatic control is required. In this paper, based on the analysis of the characteristics of the power grid AGC instructions and the study on the control characteristics of the supercritical units, a series of control strategies are proposed in accordance with the requirements of power grids to improve the load response rate of the unit under the condition of large loads, avoid the impacts of the slight fluctuation of the AGC commands on the unit control and enhance the stability of the reheat steam temperature control. The practical application proves that the optimized coordinated control system can maintain the stability of major thermal parameters and meet the requirements of the power grids for the enhancement of the flexibility of the unit operation.

Key words: thermal power generation unit, operation flexibility, AGC, coordinated control, response rate, adjustment precision

CLC Number:

TM621
TK323

GONG Guangzheng. Research on and Application of the Control Strategy for Flexibility Improvement of Supercritical Fossil-Fired Power Units[J]. Electric Power, 2017, 50(8): 22-26.

Add to citation manager EndNote|Ris|BibTeX

URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2017.08.022.05

https://www.electricpower.com.cn/EN/Y2017/V50/I8/22

References

[1] 金国强,刘爱君,高林. 2种协调控制系统对一次调频和AGC响应特性影响的仿真研究[J]. 热力发电,2013,42（10）：86-90.
JIN Guoqiang, LIU Aijun, GAO Lin. Simulation study on effect of two typical UCC systems on response performance of primary frequency regulation and AGC in a supercritical unit [J]. Thermal Power Generation, 2013, 42(10): 86-90.
[2] 姚峻,高磊,陈维和,等. 900 MW超临界机组协调控制及AGC策略的研究与应用[J]. 中国电力,2005,38(8)：62-65.
YAO Jun, GAO Lei, CHEN Weihe, et al . Research and application of coordinated control and AGC strategy in 900 MW supercritical unit [J]. Electric Power, 2005, 38(8): 62-65.
[3] 姚峻,李林,侯新建,等. 二次再热超超临界机组控制策略的研究[J]. 中国电力,2016,49(10)：17-21.
YAO Jun, LI Lin, HOU Xinjian, et al . Study on the control strategy of double-reheat ultra-supercritical unit [J]. Electric Power, 2016, 49(10): 17-21.
[4] 王建强,郑渭建,童小忠,等. 基于热网蓄热提升机组AGC、一次调频品质的试验研究[J]. 中国电力,2014,47（9）：1-5.
WANG Jianqiang, ZHENG Weijian, TONG Xiaozhong, et al . Experimental study on enhancing the quality of AGC and primary frequency regulation based on heat system accumulation[J].Electric Power, 2014, 47(9): 1-5.
[5] 王刚,郝涛,张江南,等. 火电机组一次调频合格率的影响因素分析[J]. 中国电力,2014,47（2）：23-26.
WANG Gang, HAO Tao, ZHANG Jiangnan, et al . Analysis on influencing factors of passing rate of primary frequency regulation of thermal power units [J]. Electric Power, 2014, 47(2): 23-26.
[6] 游勇华,龙洋,万俊松,等. 超超临界直流炉协调控制策略设计与应用[J]. 江西电力2013（4）：81-84.
[7] 甘勇,马虎平,张跃. 提高机组AGC调节精度及速度的技术改进[J]. 中国电业（技术版）,2014（12）：25-27.
GAN Yong, MA Huping, ZHANG Yue. Technology improvement of increasing the regulating precision and speed of AGC of unit[J]. China Electric Power(Technology Edition), 2014(12): 25-27.
[8] 田娅菲,赵文杰,田岚. 火电机组快速响应负荷指令的优化设计[J]. 自动化与仪表,2014（1）：38-42.
TIAN Yafei, ZHAO Wenjie, TIAN Lan. Optimum design of fast response for thermal power unite load instructions [J]. Automation & Instrumentation, 2014(1): 38-42.
[9] 王家兴,白焰,董玲,等. 超临界600 MW机组直流炉协调控制系统及AGC策略的改进与应用[J]. 热力发电,2008,37（12）：85-89.
WANG Jiaxing, BAI Yan, DONG Ling, et al . Retrofit of coordinated control system for once-through boiler of supercritical 600 MW unit and application of AGC strategy [J]. Thermal Power Generation, 2008, 37(12): 85-89.
[10] 樊泉桂. 超超临界锅炉设计及运行[M]. 北京：中国电力出版社,2010.

[1]	Yunrui WU, Jianpo ZHANG, Xincheng TIAN, Kaifeng YING, Zhong CHEN. Improved Coordinated Control Strategy of Multi-terminal DC Grids Considering Frequency Adaptation and Fast Stabilization Characteristics [J]. Electric Power, 2025, 58(3): 31-42.
[2]	Yumin ZHANG, Yanbin Yin, Xingquan JI, Pingfeng YE, Donglei SUN, Aiquan SONG. Optimal Dispatch of Integrated Electric-Heat Energy System Considering Supply Flexibility of Heat Networks Under Different Operation States [J]. Electric Power, 2025, 58(2): 88-102.
[3]	Ping ZHAO, Haosen JIA, Hengxiao GAO, Zhenxing LI. Coordinated Control Strategy of Modular Multi-level Converter-Based Multi-terminal Direct Current System for Onshore Wind Power Faults [J]. Electric Power, 2024, 57(8): 85-95.
[4]	Chong SHAO, Rongyi HU, Jiao YU, Mingdian WANG. Dynamic Modeling and Control Strategy for Hybrid Energy Storage System Considering State of Charge and Storage State of Hydrogen [J]. Electric Power, 2024, 57(7): 109-124.
[5]	DANG Bin, ZOU Qiqun, ZHANG Bin, FU Dong, YOU Mengkai, LE Jian. Generation-Storage Cooperative Optimization Control Method for Distribution Network Based on HSA-PSO Algorithm [J]. Electric Power, 2022, 55(4): 63-69.
[6]	LIN Qiyou, JIANG Wenliang, LI Yuanyuan, WANG Dongdong, MOU Sinan. Coordinated Control of DC Microgrid System Based on Bus Voltage Stratification [J]. Electric Power, 2022, 55(2): 166-171,180.
[7]	HE Yedan, XIA Xiangyang, YIN Xu, DENG Wenhua, WANG Can, XIONG Fuqiang, ZHOU Hanliang. MMC Coordinated Control Strategy for Maximum Power Output Under Asymmetric Voltage Sag [J]. Electric Power, 2022, 55(12): 160-167.
[8]	WU Lingyun, HE Li, XIAO Xiong, TAN Chao, CHEN Gang, ZHOU Lin. The Influence of UHVDC Additional Frequency Controller on Automatic Generation Control [J]. Electric Power, 2021, 54(8): 68-74.
[9]	ZHANG Bao, DING Yangjun, GU Zhenghao, YING Guangyao, FAN Yinlong. Optimization on the Control Mode of Thermal Power Unit to Suppress Low Frequency Oscillation of Power System [J]. Electric Power, 2020, 53(2): 137-141,149.
[10]	BAI Shuaitao, CHEN Dezhi, MA Shiying, DONG Qing, TANG Wei, JI Ping, YANG Cheng, JIANG Xikai. Operation Characteristics and Security Control Measures of UHV Loop Network with Multi-Hierarchical DC Infeed after Breaking [J]. Electric Power, 2020, 53(10): 206-214.
[11]	HUANG Hao, WU Jiping, TENG Xianliang, SUN Guoqiang, XU Rui. Performance Indices of Electrochemical Energy Storage for AGC Control Based on the Discrete Fréchet Algorithm [J]. Electric Power, 2020, 53(1): 108-114.
[12]	WANG Jianzhao, ZHONG Yiqing, SUN Yangyang, ZHOU Xian. Engineering Application and Demonstration of Control System for IGCC Power Station [J]. Electric Power, 2019, 52(2): 20-25,45.
[13]	LV Yazhou, HUO Chao, WU Xingyang, TAN Zhen, HOU Yuqiang, CUI Xiaodan, KE Xianbo, NIU Shuanbao, LI Wei. Transient Stability Emergency Control Strategy Considering FACTS [J]. Electric Power, 2019, 52(1): 96-101.
[14]	CAI Lijun, ZHU Yucai, LV Xia, WU Zhen, JIANG Pengfei, ZHAO Chao, ZHANG Kangkang, GAO Xing. MPC Applications in AGC CCS and Steam Temperature Control on Two Ultra-supercritical Coal-fired Power Generation Units [J]. Electric Power, 2018, 51(7): 68-77.
[15]	WANG Zhanzhou, CAO Lihua, WEI Honggang, YANG Ming. Study on the Influence of the Intervention of Wind Power on Steam Turbine Rotor Life [J]. Electric Power, 2018, 51(4): 101-107.