基于火电机组响应状态的“启动-并网”时长预测方法研究

doi:10.3976/j.issn.1002-4026.20240070

Abstract

Abstract:

With the rapid increase in the scale of new energy installations, the role of thermal power units in grid peak regulation has become crucial. Swift and precise prediction of the duration of the “startup-grid connection” process for thermal power units is essential for dispatchers to promptly adjust grid operation status. To address the current reliance on human experience for predicting the duration of the “startup-grid connection” process, this paper proposes a method for predicting the duration of this process for thermal power units. First, the startup-grid connection process of thermal power units is analyzed to identify key operational parameters at each stage. Then, logical calculations are leveraged to predict the duration of the “startup-grid connection” process. Results of a pilot test on a typical unit on the “Net-Source platform” indicate that the proposed model can accurately monitor the response state of the units during the “startup-grid connection” process and successfully predict its duration. This method provides timely decision support for dispatchers, helping to ensure the safety and stability of grid operations.

Key words: thermal power units, monitoring model, response state, logical calculation, duration prediction

CLC Number:

TK114

ZHANG Xudong, DUAN Chuanjun, WU Zhongjie, LI Si, WANG Chengyuan, LUO Ming. “Startup-grid connection” duration prediction method based on the response state of thermal power units[J].Shandong Science, 2025, 38(4): 130-138.

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References 13

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机组容量/MW	参数等级、启动方式	t₁/min		t₂/min	t₃/min		t₄/min		t₅/min		t₆/min		t₇/min		合计(冬季)/min
机组容量/MW	参数等级、启动方式	①	②	t₂/min	①	②	①	②	①	②	①	②	①	②	①	②
300	亚临界 (高压缸启动)	120	90	夏季≥120; 冬季≥240	100	90	230	140	100	90	15	10	90	80	895	740
300	超临界 (中压缸启动)	120	90	夏季≥120; 冬季≥240	100	90	375	150	175	85	35	25	200	150	1 245	830
600	超临界 (中压缸启动)	180	120	夏季≥120; 冬季≥240	100	90	375	150	270	100	90	20	140	270	1 395	990
600	超超临界 (中压缸启动)	180	120	夏季≥120; 冬季≥240	100	90	400	150	260	70	100	35	140	145	1 420	850
	超临界 (联合启动)		120			90		240		80		5		85		860
	超超临界 (高压缸启动)		120			90		240		105		30		160		985
	超超临界 (中压缸启动)		120			90		240		105		30		160		985
1 000	超超临界,一次再热 (高压缸启动)	180	120	夏季≥120; 冬季≥240	100	90	650	200	150	150	30	30	215	215	1 565	1 045
	超超临界,一次再热 (联合启动)	180	120		100	90	650	200	60	60	45	50	100	100	1 375	860
	超超临界,二次再热 (超高压缸启动)	180	120		100	90	650	270	60	10	100	70	140	160	1 470	960

机组容量 /MW	参数等级、启动方式	t₁/min	t₃/min	t₄/min	t₅/min	t₆/min	t₇/min	合计(冬季)/min
300	亚临界(高压缸启动)	60	60	100	20	5	80	325
300	超临界(中压缸启动)	60	60	80	20	20	75	315
600	超临界(中压缸启动)	60	75	80	30	20	135	400
	超超临界(中压缸启动)	60	75	80	25	15	75	330
	超临界(联合启动)	60	75	180	55	5	55	430
	超超临界(高压缸启动)	60	75	100	100	15	150	500
	超超临界(中压缸启动)	60	75	100	100	15	150	500
1 000	超超临界,一次再热 (高压缸启动)	60	75	80	25	15	135	390
	超超临界,一次再热 (高中压缸联合启动)	60	75	80	5	5	55	280
	超超临界,二次再热 (超高压缸启动)	60	75	110	5	5	120	375

启动阶段	关键运行参数
锅炉上水(亚临界)	有“省煤器前给水压力”测点:送风机电流、引风机电流、省煤器前给水压力、汽包水位
锅炉上水(亚临界)	无“省煤器前给水压力”测点:送风机电流、引风机电流、汽包水位、给水流量、一次风机电流、磨煤机电流、燃料量
锅炉上水(超临界及以上等级)	送风机电流、引风机电流、省煤器前给水压力(有“省煤器前给水压力”测点)
锅炉上水(超临界及以上等级)	送风机电流、引风机电流、给水流量、一次风机电流、磨煤机电流、燃料量(无“省煤器前给水压力”测点)
锅炉(吹扫)点火	送风机电流、引风机电流、主汽温度、再热蒸汽温度、汽机转速
锅炉升温升压	送风机电流、引风机电流、主汽温度、再热蒸汽温度、汽机转速
汽机冲转	主汽温度、再热蒸汽温度、汽机转速、有功功率、并网信号
机组并网	主汽温度、再热蒸汽温度、汽机转速、有功功率、并网信号

启动阶段	监测参数	模型判断条件
汽机冲转	主汽温度、再热蒸汽温度、汽机转速、有功功率、并网信号	冲转开始:主汽温或再热汽温大于200 ℃且汽机转速刚好满足30 s均值稳步上升并小于2 990 r/min 正在冲转:主汽温或再热汽温大于200 ℃且汽机转速30 s均值稳步上升,同时汽机转速3 min均值小于2 990 r/min 冲转结束:机组功率小于1 MW或并网信号为0且主汽温或再热汽温大于200 ℃,同时汽机转速刚好满足3 min均值大于2 990 r/min
机组并网	主汽温度、再热蒸汽温度、汽机转速、有功功率、并网信号	并网开始状态:主汽温或再热汽温大于200 ℃且汽机转速刚好满足3 min均值大于2 990 r/min 正在并网状态:主汽温或再热汽温大于200 ℃且汽机转速3 min均值大于2 990 r/min,同时机组有功功率小于1 MW或并网信号为0 并网成功状态:主汽温或再热汽温大于200 ℃且汽机转速3 min均值大于2 990 r/min,且刚好满足机组有功功率大于1 MW或并网信号为1

“Startup-grid connection” duration prediction method based on the response state of thermal power units

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