燃煤机组深度调峰时进相能力分析及提升措施
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摘要
文章根据发电机组进相试验中限制因素情况,分析燃煤发电机组深度调峰时进相限制因素,通过一起深度调峰下机组进相试验验证限制因素情况,并根据限制因素情况,提出提升深度调峰下机组进相能力的措施。指出深度调峰机组进相时主要限制因素为厂用电压,其次为机端电压、静稳极限,抬高电网电压或切换厂用电至启备变可有效提升深度调峰机组进相能力。通过深度调峰进相试验得出:电网电压一致的情况下,机组进相能力跟有功呈线性关系,有功降低,进相能力增强,为深度调峰机组进相运行提供理论和实证依据。
In this paper,the leading phase limiting factors of coal-fired units in the deep peak-regulation in accordance with the limiting factors in the leading phase test of the generating unit.The measures on improving the leading phase capacity of the unit at deep peak regulation are proposed though the limiting factors of the leading phase limiting factors of the unit and in accordance with the limiting factors.It is pointed out that the main limiting factors at the deep peak regulating unit is mainly the auxiliary power voltage,then stator voltage and static stability limit,and elevation of grid voltage or switching auxiliary power plant to start transformer can effectively enhance the leading phase capacity in the deep peakregulation.It is concluded through the leading phase test of the deep peak regulation that under identical grid voltage,the leading phase capacity of the unit shows linear relationship with active power.The lower the active power is,the higher the leading capacity is,which provides theoretical and true base for the leading phase operation of the deep peak regulation.
In this paper,the leading phase limiting factors of coal-fired units in the deep peak-regulation in accordance with the limiting factors in the leading phase test of the generating unit.The measures on improving the leading phase capacity of the unit at deep peak regulation are proposed though the limiting factors of the leading phase limiting factors of the unit and in accordance with the limiting factors.It is pointed out that the main limiting factors at the deep peak regulating unit is mainly the auxiliary power voltage,then stator voltage and static stability limit,and elevation of grid voltage or switching auxiliary power plant to start transformer can effectively enhance the leading phase capacity in the deep peakregulation.It is concluded through the leading phase test of the deep peak regulation that under identical grid voltage,the leading phase capacity of the unit shows linear relationship with active power.The lower the active power is,the higher the leading capacity is,which provides theoretical and true base for the leading phase operation of the deep peak regulation.
引文
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[15]李辉,鲁功强,王育学,等.大型水轮发电机失磁保护与低励限制配合问题的探讨[J].电力系统保护与控制,2014,42(5):68-72.LI Hui,LU Gongqiang,WANG Yuxue,et al. Discussion on coordination between loss of excitation protection and under excitation limit control for large hydro-generator[J]. Power System Protection and Control,2014,42(5):68-72.
[2]卫鹏,刘建坤,周前.考虑相关性的沿海大规模风电场出力特性研究[J].江苏电机工程,2016,35(5):6-9.WEI Peng,LIU Jiankun,ZHOU Qian. Research on power output characteristics of coastal large-scale wind farms considering their correlation[J]. Jiangsu Electrical Engineering,2016,35(5):6-9.
[3]倪春花,李弘毅,吴在军.雾霾对光伏发电量的影响分析[J].江苏电机工程,2015,34(6):77-81.NI Chunhua,LI Hongyi,WU Zaijun. Impact analysis of haze on photovoltaic system’s power generation[J]. Jiangsu Electrical Engineering,2015,34(6):77-81.
[4]宁光涛,谢海鹏,别朝红,等.海南电网分布式光伏消纳能力评估[J].南方电网技术,2015,9(5):59-65.NING Guangtao,XIE Haipeng,BIE Chaohong,et al. Evaluation of distributed photovoltaic integration capacity of Hainan power grid[J]. Southern Power System Technology,2015,9(5):59-65.
[5]刘振亚.特高压电网[M].北京:中国经济出版社,2005.
[6]赵畹君.高压直流输电工程技术[M].北京:中国电力出版社,2004.
[7]白顺明,杨东俊,盛尧,等.区外直流特高压送大区电网电能消纳方式分析[J].电力建设,2016,37(1):84-91.BAI Shunming,YANG Dongjun,SHENG Yao,et al. Electric power consumption mode analysis of UHVDC outside sending to large area of power grid[J]. Electric Power Construction,2016,37(1):84-91.
[8]梅天华,李磊,陈靖文.考虑外来电分摊的浙江燃煤机组调停调峰市场机制研究[J].电力建设,2016,37(3):117-123.MEI Tianhua,LI Lei,CHEN Jingwen. Shut-down peakingmarket mechanism of Zhejiang coal-fired units consideringimport power allocation[J]. Electric Power Construction,2016,37(3):117-123.
[9]解兵,徐珂,刘建坤,等.电网低负荷期间发电机组进相运行分析及管理[J].江苏电机工程,2015,34(4):28-31.XIE Bing,XU Ke,LIU Jiankun,et al. Analysis and man-agement of generators’leading phase during low load inpower grid[J]. Jiangsu Electrical Engineering,2015,34(4):28-31.
[10]同步发电机进相试验导则:DW746—2012[S]. 2016.
[11]同步发电机进相试验导则:DL/T 1523—2016[S]. 2016.Guide on leading power factor operation test of synchro-nous generator:DL/T 1523—2016[S]. 2016.
[12]周德贵,巩北宁.同步发电机运行技术与实践[M].北京:中国电力出版社,2004.
[13]郭春平,余振,殷修涛.发电机低励限制与失磁保护的配合整定计算[J].中国电机工程学报,2012,32(28):129-132.GUO Chunping,YU Zhen,YAN Xiutao. Coordinative set-ting calculation of minimum-excitation limit and loss-of-ex-citation protection for generator[J]. Proceedings of the CSEE,2012,32(28):129-132.
[14]汪静,余高旺.华东电网并网机组涉网保护相关标准及核查问题分析[J].电力工程技术,2017,36(5):66-70.WANG Jing,YU Gaowang. Analysis of related standards and verification problems of grid-related generator protection in state grid East China branch[J]. Electric Power Engineering Technology,2017,36(5):66-70.
[15]李辉,鲁功强,王育学,等.大型水轮发电机失磁保护与低励限制配合问题的探讨[J].电力系统保护与控制,2014,42(5):68-72.LI Hui,LU Gongqiang,WANG Yuxue,et al. Discussion on coordination between loss of excitation protection and under excitation limit control for large hydro-generator[J]. Power System Protection and Control,2014,42(5):68-72.