Characteristic Model of Combined Governing Valve and Governing Stage and Optimization of Steam Distribution of Steam Turbine

被引：2
|
作者：
Zhang H. [1 ]
Xu J. [1 ]
Sun Y. [2 ]
Huang X. [1 ]
Chen X. [1 ]
Huangfu Z. [1 ]
Zhou L. [1 ]
机构：
[1] Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing
[2] Huadian EIectric Power Research Institute, Hangzhou
来源：
Jixie Gongcheng Xuebao/Journal of Mechanical Engineering | 2019年 / 55卷 / 18期
关键词：
Governing stage; Governing valve; Optimization of steam distribution; The combination flow characteristics; Varying condition;
D O I：
10.3901/JME.2019.18.165
中图分类号：
学科分类号：
摘要：
For the nozzle steam turbine, the combined flow characteristics calculation model of governing valve and governing stage is established by calculation, and tested with open literature experimental data. The accurate flow of the governing valve can be calculated with the model by using the combination pressure ratio and the valve opening, which is convenient for engineering application. Method a calculation model for the off-design performance of a 300 MW steam turbine unit based on the combined valve model, and the valve distribution function is optimized, and the flow character of the sequential valve is obtained. Then the steam distribution optimization is analyzed by using the load and valve position. Analysis shows that the combined flow characteristics calculation model of governing valve and governing stage can reflect the characteristics of the valve accurately. According to the model, the flow characteristic is optimized, the reasonable overlap degree is obtained. The optimal slip pressure curve of the unit is obtained, which reduce the heat consumption during low-load operation of the unit and improves the flexibility and peak-regulating capacity of the unit and provides the theoretical basis for optimization test. © 2019 Journal of Mechanical Engineering.
引用
收藏
页码：165 / 172
页数：7
相关论文
共 23 条
  • [11] Yang X., Hosseini S., Gandomi A.H., Firefly algorithm for solving non-convex economic dispatch problems with valve loading effect, Applied Soft Computing Journal, 12, 3, pp. 1180-1186, (2012)
  • [12] Yin C., Liu J., Study on valve management of DEH for steam turbine, Energy & Power Engineering, 5, 4, pp. 319-323, (2013)
  • [13] Ma L., Xu J., Cao Z., Research on varying condition characteristic of steam turbine governing stage based on dimensional analysis, Proceedings of the Chinese Society for Electrical Engineering, 34, 5, pp. 778-783, (2014)
  • [14] Lei Z., Zhang X., Chen T., Et al., Research of steam turbine governing valve flow characteristic optimization based on adaptive model, Electric Power, 51, 3, pp. 21-28, (2018)
  • [15] Li L., Xu J., Shi Y., Operation mode optimization for a 600 MW steam turbine unit, Power Equipment, 24, 6, pp. 396-400, (2010)
  • [16] Cao Z., Varying Condition Characteristic of Steam Turbine, (1991)
  • [17] Xu J., Cao Z., Turbine speed governor system and the mathematical model of governing stage, Turbine Technology, 1, pp. 15-21, (1991)
  • [18] Ma L., Xu J., Et al., The influence of overlap degree research on nozzle governing characteristic, Energy and Power Engineering, 5, pp. 642-645, (2013)
  • [19] Ma L., Xu J., Study on influence of valve overlapping degree of 600 MW nozzle governing steam turbines, Power Equipment, 27, 6, pp. 382-385, (2013)
  • [20] Xu J., Ma L., Sun Y., Et al., Research on characteristics of varying conditions for nozzle governing stage based on dimensional analysis, Energy, 65, pp. 590-595, (2014)
123