Overview on the Current Situation of Steam Turbine Low-Pressure Cylinder Zero-Output Technology Under Background of Power Grid Peak Regulation

doi:10.12096/j.2096-4528.pgt.21079

Abstract

Abstract:

In order to solve the problem of peak load regulation in winter and new energy consumption in China, zero-output technology of low-pressure cylinder was proposed. On the basis of studying a large number of literature materials, this paper briefly introduced the application scenario and technical principle of low-pressure cylinder zero-output technology, and discussed the theoretical research and application of low-pressure cylinder zero-output technology in practical engineering. As a kind of power plant operation scheme, low-pressure cylinder zero-output technology has the characteristics of significant peak regulation capability, low reconstruction cost and high economy. Although this scheme has a very broad development prospect, there are still many practical problems to be solved urgently if we want to promote its application.

Key words: steam turbine, low-pressure cylinder, zero-output technology, power grid peak load regulation, combined heat and power generation

CLC Number:

TK 11

Qiyao ZUO, Zhen TANG, Huiyong LI, Ying ZHANG, Jiangfeng WANG. Overview on the Current Situation of Steam Turbine Low-Pressure Cylinder Zero-Output Technology Under Background of Power Grid Peak Regulation[J]. Power Generation Technology, 2022, 43(4): 645-654.

Figures/Tables 3

References 42

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参数	锅炉最小出力工况	锅炉额定出力工况	低压缸零出力工况
发电功率/MW	200.32	248.77	110.81
电负荷出力系数/%	57.2	71.1	31.7
主蒸汽流量/(t/h)	885.7	1053.0	579.0
锅炉出力系数/%	84.1	100.0	55.0
主蒸汽压力/MPa	14.74	16.67	10.04
主蒸汽温度/℃	538.0	538.0	532.6
再热热段蒸汽流量/(t/h)	737.75	863.61	492.95
再热热段蒸汽压力/MPa	2.80	3.26	1.85
再热热段蒸汽温度/℃	538.0	538.0	511.6
低压缸排汽流量/(t/h)	180.50	261.89	20.00
供热量/MW	288.0	288.0	288.0

参数	锅炉最小出力工况	锅炉额定出力工况	低压缸零出力工况
发电功率/MW	200.32	248.77	110.81
电负荷出力系数/%	57.2	71.1	31.7
主蒸汽流量/(t/h)	885.7	1053.0	579.0
锅炉出力系数/%	84.1	100.0	55.0
主蒸汽压力/MPa	14.74	16.67	10.04
主蒸汽温度/℃	538.0	538.0	532.6
再热热段蒸汽流量/(t/h)	737.75	863.61	492.95
再热热段蒸汽压力/MPa	2.80	3.26	1.85
再热热段蒸汽温度/℃	538.0	538.0	511.6
低压缸排汽流量/(t/h)	180.50	261.89	20.00
供热量/MW	288.0	288.0	288.0

工况	供热量增量/MW	煤耗量减量/[g/(kW∙h)]
50%额定工况	72.2	147.1
75%额定工况	76.6	106.5
100%额定工况	76.0	84.7

工况	供热量增量/MW	煤耗量减量/[g/(kW∙h)]
50%额定工况	72.2	147.1
75%额定工况	76.6	106.5
100%额定工况	76.0	84.7

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[9]	Xiaojun HUANG,Xiangguo DU. Effect of 600 MW Supercritical Steam Turbine Prolonging Running Time of Mixing Valve on Unit Vibration [J]. Power Generation Technology, 2019, 40(2): 175-180.
[10]	Yun LUO,Xuelin CHEN,Ruidong LI,Yongjian SU,Yiwei XU,Junkai CHAO,Pengzhu LI,Haibin REN. Prediction Model and Application of Turbine Regulating Stage Pressure Under Variable Conditions [J]. Power Generation Technology, 2019, 40(2): 161-167.
[11]	Lihua CAO,Kai ZHOU,Heyong SI. Study on Installing Deflector in Exhaust Hood of Steam Turbine Based on Quadratic Regressive Orthogonal Experiment [J]. Power Generation Technology, 2019, 40(1): 56-60.
[12]	Chuanling LIU,Minghui LIU,Zhenjiang CHEN,Ang SONG. Analysis on the Change of Steam Turbine Back Pressure Under Operation of Low Pressure Economizer [J]. Power Generation Technology, 2018, 39(4): 378-381.
[13]	Yi LI. Heat Supply System of 2×300MW Units' Circulating Water Waste Heat [J]. Power Generation Technology, 2018, 39(3): 244-248.
[14]	WANG Yu, XU Weixuan, GUO Baoren. Vibration Test and Analysis of Dynamic Balancing without Test-mass on Multi-plane for a 350MW Turbo-generator Unit [J]. Power Generation Technology, 2017, 38(6): 53-56.
[15]	GUO Shuang, WANG Yu, WANG Yan-dong. Process Analysis of a 600MW Subcritical Air-cooled Unit Speed Up to 3000r/min [J]. Power Generation Technology, 2017, 38(1): 48-50.