Application of Unified Power-Regulating System of Auxiliary Equipment on a 660 MW Unit

doi:10.11930/j.issn.1004-9649.201705052

Abstract

Abstract: The unified power-regulating system of auxiliary equipment (UPRS), which is mainly composed of variable-high-speed turbine and variable-frequency generator, adjusts the main auxiliary equipment with the same optimum operating frequency. It reduces the throttle loss of the system and improves the transmission efficiency, while the system is more centralized, simple and easy to maintain. A power source system of boiler fan driven by frequency conversion is adopted in a 660MW unit. The operating characteristics of the system are figured out through performance tests, and the optimal operating modes under different loads are also obtained. The best operating frequencies under THA, 75%THA and 50%THA operating conditions are 47Hz, 41Hz and 41Hz, respectively. Within the range of frequency 41~50Hz, the coal consumption of the unit when the power source system is operated under the optimal frequency is slightly less than or basically equal to that under the operation frequency before the transformation, and is slightly more than that with the variable frequency operation state, but the power consumption rate of the unit decreases significantly, and the net power supply capacity is also significantly improved. With the decrease of operating frequency, the efficiency of induced fan, primary fan and blower are improved to some extent. The total power consumption of the three blower fans is approximately linear with the operating frequency. The operating frequency is reduced from 50Hz to the optimal point, the total energy consumption is reduced by 308kW/816kW and 868kW respectively under the condition of 75THA and 50%THA.

Key words: coal-fired power units, variable-high-speed turbine, variable-frequency generator, unified power-regulating system of auxiliary equipment, uniformly regulate, operating efficiency, coal consumption of power supply

CLC Number:

TK01
TM621

MU Chunhua, LV Kai, XU Pengjiang, SUN Dawei, WU Pengyue, MA Tingshan, JU Wenping, LI Dongquan. Application of Unified Power-Regulating System of Auxiliary Equipment on a 660 MW Unit[J]. Electric Power, 2018, 51(9): 65-72.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201705052

https://www.electricpower.com.cn/EN/Y2018/V51/I9/65

References

[1] 王勇. 330 MW机组电动给水泵改汽动给水泵的研究与实践[D]. 北京:华北电力大学, 2014. WANG Yong. Study and practice of the driving mode of feed water pumps for 330 MW units[D]. Beijing:North China Electric Power University, 2014.
[2] 段栋伟, 徐钢, 刘琦, 等. 600 MW亚临界空冷机组电泵改汽泵性能评估[J]. 电站系统工程, 2017, 33(1):29-33 DUAN Dongwei, XU Gang, LIU Qi, et al. The performance evaluation of electric pump to steam pump for 600 MW subcritical air cooling unit[J]. Power System Engineering, 2017, 33(1):29-33
[3] 王宽. 大型发电厂引风机驱动方式改造的技术经济研究[D]. 杭州:浙江大学, 2013. WANG Kuan. Study on technical economy of the driven mode of induced draft fan for large power plant[D]. Hangzhou:Zhejiang University, 2013.
[4] 谭灿燊, 吴阿峰. 电站锅炉引风机驱动方式的分析比较[J]. 热力发电, 2012, 41(8):12-14 TAN Canshen, WU Afeng. Analysis and comparison of driven mode for induced draft fan in thermal power plant[J]. Thermal Power Generation, 2012, 41(8):12-14
[5] 金蓉, 石奇光, 杨燕玲, 等. 考虑管道热效率的汽动引风机选择方案[J]. 热力发电, 2013, 42(1):5-8 JIN Rong, SHI Qiguang, YANG Yanling, et al. Selection of steam-driven induced draft fan considering piping thermal efficiency[J]. Thermal Power Generation, 2013, 42(1):5-8
[6] 刘桂生, 马骏驰, 丁平, 等. 循环水泵电动机双速改造[J]. 热力发电, 2008, 37(2):66-67 LIU Guisheng, MA Junchi, DING Ping, et al. Retrofitting electric motor of circulating water pump into a double-speed one[J]. Thermal Power Generation, 2008, 37(2):66-67
[7] 宋晓卓. 某自备电厂锅炉风机的变频改造分析[D]. 西安:西安工程大学, 2015. SONG Xiaozhuo. Operating transformation analysis on the fans for boiler in a personal used power plant[D]. Xi'an:Xi'an Polytechnic University, 2015.
[8] 毛刚, 汤载阳. 动叶可调引风机变频改造的经济性论证[J]. 电力勘测设计, 2015(2):44-46,64 MAO Gang, TANG Zaiyang. Economic argumentation of variable frequency reconstruction for axial fan with adjustable blades[J]. Electric Power Survey & Design, 2015(2):44-46,64
[9] 曹磊. 火力发电厂高压电动机变频改造及其安全性经济性分析[D]. 济南:山东大学, 2015. CAO Lei. The variable-frequency renovation for high-voltage motors and its safety and economy analysis in coal-fired power plant[D]. Jinan:Shandong University, 2015.
[10] 梅德奇, 张福仲. 亚临界600 MW空冷机组凝结水泵变频改造[J]. 热力发电, 2013, 42(1):103-104,108 MEI Deqi, ZHANG Fuzhong. Frequency conversion transformation of condensate pump for a 600 MW subcritical air-cooled unit[J]. Thermal Power Generation, 2013, 42(1):103-104,108
[11] 盛喜兵, 李振强, 杜化仲, 等. 330 MW机组凝结水泵变频改造及系统运行优化[J]. 热力发电, 2011, 40(9):86-88 SHENG Xibing, LI Zhenqiang, DU Huazhong, et al. Frequency conversion retrofit of condensate pump for 330 MW unit and system operation optimization thereof[J]. Thermal Power Generation, 2011, 40(9):86-88
[12] 翟慎会, 胡训栋, 高永芬, 等. 汽轮机同轴驱动给水泵传动装置的研究[J]. 电站系统工程, 2014, 30(1):42-44 ZHAI Shenhui, HU Xundong, GAO Yongfen, et al. Research on transmissions of feed water pump coaxially driven by turbine[J]. Power System Engineering, 2014, 30(1):42-44
[13] 欧卫海. 液偶调速电动给水泵节能改造方案解析-行星齿轮变矩调速器与变频器方案对比[J]. 南方能源建设, 2016, 3(S1):21-26 OU Weihai. Boiler feedwater pump hydraulic coupler energy saving retrofit scheme:compare of planetary gear torque speed solution and variable frequency drive solution[J]. Southern Energy Construction, 2016, 3(S1):21-26
[14] 徐光涛. 行星齿轮调速器在660 MWe超临界空冷机组电动给水泵上的应用[J]. 电力技术, 2010, 19(8):43-46
[15] 章世斌, 蒋庆群, 张贵良, 等. 永磁驱动调速技术在引风机改造中的应用[J]. 热力发电, 2014, 43(5):135-138 ZHANG Shibin, JIANG Qingqun, ZHANG Guiliang, et al. Application of permanent magnetic speed control technology in ID fan retrofitting[J]. Thermal Power Generation, 2014, 43(5):135-138
[16] 王洪滨, 刘文华, 杜江, 等. 永磁调速节能技术在大功率循环水泵上的应用[J]. 节能技术, 2012, 32(2):178-181 WANG Hongbin, LIU Wenhua, DU Jiang, et al. Applications of permanent magnet speed control energy-saving technology for high-power circulating water pumps[J]. Energy Conservation Technology, 2012, 32(2):178-181
[17] 华能威海发电有限责任公司6号机组节能先进技术集成应用及示范项目改造效果分析报告[R]. 西安:西安热工研究院有限公司, 2016:1-11.