Research and Implementation of In-Depth Frequency Regulation Technology with Heater Removal

doi:10.11930/j.issn.1004-9649.202009007

Abstract

Abstract: Poor frequency regulation performance has been linked to the limited heat storage capacity of ultra-supercritical boilers under in-depth frequency regulation working conditions in the event of low frequency failure of power grid. To address this issue, the authors proposed an in-depth frequency regulation technology in which the heat storage of regenerative system based on heater removals are fully utilized to participate in grid frequency control. In addition, the field testing was carried out on a typical 660 MW ultra-supercritical unit and the responding characteristics with respect to different heater removals as well as their impacts on the safe and stable operation of the unit were obtained. Accordingly, this paper designed the heater-removal-based frequency modulation strategies and then conducted tests for verification. The test results show that under the premise of ensuring the safe and stable operation of the unit, the proposed technology can effectively improve the unit performance of response to frequency modulation. Therefore, it can be implemented as a new manner to enhance the primary frequency regulation capability of thermal power units operated under large frequency difference conditions in the power grid.

Key words: coal-fired power generating unit, large frequency difference, deep frequency regulation, heater removal, control, safety

CHEN Huanle, GUI Yishu, CHEN Wei, WANG Yang, LU Honglin, MING Lei. Research and Implementation of In-Depth Frequency Regulation Technology with Heater Removal[J]. Electric Power, 2021, 54(3): 168-176.

Add to citation manager EndNote|Ris|BibTeX

URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202009007

https://www.electricpower.com.cn/EN/Y2021/V54/I3/168

References

[1] 归一数, 沈丛奇, 陈欢乐, 等. 火电燃煤机组大频差一次调频性能研究与优化实施[J]. 中国电力, 2017, 50(4): 106-112
GUI Yishu, SHEN Congqi, CHEN Huanle, et al. Research and optimization on primary frequency regulation characteristics with large frequency deviation for coal-fired power plants[J]. Electric Power, 2017, 50(4): 106-112
[2] 廖金龙. 大功率火电机组一次调频能力建模与优化[D]. 杭州: 浙江大学, 2020.
LIAO Jinlong. Primary frequency control ability modeling and optimization of large-scale thermal power units[D]. Hangzhou: Zhejiang University, 2020.
[3] 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, 20
DENG Tuoyu, TIAN Liang, LIU Jizhen. 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, 20
[4] 宣晓华, 尹峰, 张永军, 等. 特高压受端电网直流闭锁故障下机组一次调频性能分析[J]. 中国电力, 2016, 49(11): 140-144
XUAN Xiaohua, YIN Feng, ZHANG Yongjun, et al. Analysis on primary frequency regulation performance of the units under DC blocking fault in UHV receiving end power grid[J]. Electric Power, 2016, 49(11): 140-144
[5] 宋崇明, 田雪沁, 徐彤, 等. 配置蓄热装置对火电机组一次调频性能影响[J]. 中国电力, 2020, 53(2): 120-128
SONG Chongming, TIAN Xueqin, XU Tong, et al. Effect of heat storage device on primary frequency regulation capacity of thermal power unit[J]. Electric Power, 2020, 53(2): 120-128
[6] 国家能源局华东监管局. 华东区域并网发电厂辅助服务管理实施细则[Z]. 2019-03-28.
[7] 中华人民共和国国家质量监督检验检疫总局, 中国国家标准化管理委员会. 火力发电机组一次调频试验及验收导则: GB/T 30370-2013[S]. 北京: 中国标准出版社, 2014.
[8] 汤可怡, 杨建明, 蔡喜冬. 大型机组一次调频性能优化方法[J]. 发电设备, 2016, 30(6): 374-377
TANG Keyi, YANG Jianming, CAI Xidong. Optimization on primary frequency regulation of large power units[J]. Power Equipment, 2016, 30(6): 374-377
[9] 柴小明. 超临界火电机组一次调频裕量及提升方法研究[D]. 济南: 山东大学, 2019.
CHAI Xiaoming. Study on primary frequency modulation margin and improving methods of supercritical thermal power unit[D]. Jinan: Shandong University, 2019.
[10] 姚峻, 祝建飞, 金峰. 1 000 MW机组节能型协调控制系统的设计与应用[J]. 中国电力, 2010, 43(6): 79-84
YAO Jun, ZHU Jianfei, JIN Feng. Design and application of energy-saving coordination control system in 1 000 MW unit[J]. Electric Power, 2010, 43(6): 79-84
[11] 王玮, 刘吉臻, 曾德良, 等. 凝结水节流变负荷能力静态建模与分析[J]. 动力工程学报, 2015, 35(9): 740-745, 759
WANG Wei, LIU Jizhen, ZENG Deliang, et al. Static modelling and analysis on load change capability of condensate throttling[J]. Journal of Chinese Society of Power Engineering, 2015, 35(9): 740-745, 759
[12] 祝建飞, 沈丛奇, 姚峻, 等. 汽轮机组经济运行方式下新型一次调频技术[J]. 中国电力, 2017, 50(5): 144-150
ZHU Jianfei, SHEN Congqi, YAO Jun, et al. New primary frequency regulation technologies for steam turbines under economical operation mode[J]. Electric Power, 2017, 50(5): 144-150
[13] 黄树红, 孙奉仲, 杨建明, 等. 汽轮机原理[M]. 北京: 中国电力出版社, 2008.
[14] 邢希东. 高压加热器解列对机组安全及经济性的影响[J]. 热力透平, 2010, 39(2): 144-146
XING Xidong. Influence of high-pressure heaters step-out on unit’ security and economy[J]. Thermal Turbine, 2010, 39(2): 144-146
[15] 马良玉,宁福军,宋胜男. 凝结水节流对机组负荷影响的仿真研究[J]. 热力发电, 2015, 44(3): 109-114
MA Liangyu, NING Fujun, SONG Shengnan. Influence of condensate throttling on unit load: simulation test[J]. Thermal Power Generation, 2015, 44(3): 109-114
[16] 杜洋洋,冯伟忠. 基于弹性回热技术的调频性能研究[J]. 华东电力, 2014, 42(9): 1944-1949
DU Yangyang, FENG Weizhong. Research of properties of frequency regulation based on the flexible extraction technology[J]. East China Electric Power, 2014, 42(9): 1944-1949
[17] 平先登. 火电机组AGC系统切除高压加热器的性能研究[D]. 北京: 北京交通大学, 2015.
PING Xiandeng. Research on the AGC system performance after the removal of high pressure heater in the coal-fired power unit[D]. Beijing: Beijing Jiaotong University, 2015.
[18] 余兴刚, 李旭, 陈非, 等. 超临界机组加热器异常时运行优化措施和疏水系统改进建议[J]. 中国电机工程学报, 2019, 39(22): 6648-6656
YU Xinggang, LI Xu, CHEN Fei, et al. Optimization of operation and draining system for a supercritical unit under the abnormal condition of heaters[J]. Proceedings of the CSEE, 2019, 39(22): 6648-6656
[19] 崔永波. 基于LabVIEW的电厂回热系统经济性分析与故障诊断系统研究[D]. 长沙: 长沙理工大学, 2012.
CUI Yongbo. Research about economic analysis and falut diagnosis system of fire power generating units based on LabVIEW[D]. Changsha: Changsha University of Science & Technology, 2012.