• CSCD核心库收录期刊
  • 中文核心期刊
  • 中国科技核心期刊

电力建设 ›› 2013, Vol. 34 ›› Issue (4): 95-98.

• 运行与管理 • 上一篇    下一篇

汽轮机偏周波运行事故分析

党小建1,李志华1,2,廖军林1,王峥1   

  1. 1.西安热工研究院有限公司,西安市 710032;2.西安理工大学水利水电学院,西安市 710048
  • 出版日期:2013-04-01
  • 作者简介:党小建(1968),男,硕士,高级工程师,主要从事火电调试工作和火电调试技术研究工作; 李志华(1983),男,硕士,工程师,主要从事火电和水电的调试工作及相关技术研究工作; 廖军林(1979),男,本科,工程师,主要从事火电汽轮机专业调试工作及相关技术研究工作; 王峥(1982),男,硕士研究生,工程师,主要从事大型火电机组热控研究及调试工作。

Analysis on Partial Frequency Accident of Turbine

DANG Xiaojian1, LI Zhihua1,2, LIAO Junlin1,WANG Zheng1   

  1. 1.Xi’an Thermal Power Research Institute Co., Ltd., Xi’an 710032, China; 2.Institute of Water Resources and Hydro-electric Engineering, Xi’an University of Technology, Xi’an 710048, China
  • Online:2013-04-01

摘要:

某电厂因汽轮机偏周波运行引起停机事故。基于对汽轮机偏周波运行事故过程的分析,得出高、低压旁路后蒸汽温度波动频繁及事故停机的主要原因是高压排汽逆止门未开启而汽轮机带大负荷、造成高排金属温度高。分析了切除高压缸带大负荷对汽轮机的危害,提出了有关偏周波保护、低旁减温水、高压排汽逆止门的逻辑组态建议。运行实践表明:该逻辑组态方案可以避免事故发生,并且安全、可靠。

关键词: 汽轮机, 偏周波运行, 转子寿命, 高排逆止门

Abstract:

A shut-down accident occurred in a power plant because of turbine’s partial frequency operation. The main reasons of frequent fluctuations of steam temperature behind high and low pressure bypass in HP casing exhaust lie in high metal temperature, which is caused by the closed non-return valve and the heavy turbine load. Meanwhile, the harm to turbines caused by the removal of high pressure cylinder under large load is analyzed. Finally, some suggestions on logical configuration of partial frequency protection, desuperheating water of low pressure bypass and non-return valve are proposed in HP casing exhaust. The operation practice show that the logical configuration scheme could avoid accidents and be safe and reliable.

Key words: turbine, partial frequency, rotor life, HP casing exhaust non-return valve