Analysis on start-up and commissioning of supercritical 660 MW steam turbine

WU Shougui; LIU Jifeng; ZHANG Chen; GAO Kui; WANG Xinyang

doi:10.19666/j.rlfd.201709104

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Analysis on start-up and commissioning of supercritical 660 MW steam turbine

更新时间：2025-09-28

- Analysis on start-up and commissioning of supercritical 660 MW steam turbine
- Thermal Power Generation Vol. 47, Issue 4, Pages: 99-103(2018)
- 作者机构：
  
  西安热工研究院有限公司
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.201709104
  CLC： TK26
- Published Online：09 April 2018，
  
  Published：2018
- 稿件说明：
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WU Shougui, LIU Jifeng, ZHANG Chen, et al. Analysis on start-up and commissioning of supercritical 660 MW steam turbine[J]. Thermal power generation, 2018, 47(4): 99-103.
DOI：

WU Shougui, LIU Jifeng, ZHANG Chen, et al. Analysis on start-up and commissioning of supercritical 660 MW steam turbine[J]. Thermal power generation, 2018, 47(4): 99-103. DOI： 10.19666/j.rlfd.201709104.

摘要

针对某超临界660 MW机组汽轮机启动调试过程中出现低速暖机时间长、带初负荷过程负荷和再热蒸汽压力异常波动、再热器多次保护动作导致机组跳闸事故等重大问题

分析并阐明启动参数低、X7准则定值高、高中压调节阀开度比例不匹配、分布式控制系统与汽轮机数字电液控制系统控制逻辑不完善是存在问题的主要原因。通过启动参数调整、X7准则优化、控制策略优化以及逻辑深度排查

并针对问题提出有效的防范措施后

再次启动顺利完成汽轮机空负荷试运

带负荷试运以及一次性通过168 h满负荷连续试运

可为同类型新建机组的汽轮机启动调试提供借鉴。

Abstract

During the start-up and commissioning process of a supercritical 660 MW unit steam turbine

the lowspeed warm-up time was over long

the load and reheat steam pressure in the initial load process fluctuated abnormally

and multiple protection actions of the reheater caused several serious accidents like tripping.Investigation on these problems shows that

low start-up parameter

high setting value of X7 criterion

dismatch of the high and medium pressure regulating valve opening ratio

and imperfection of the control logic in distributed control system(DCS) and turbine digital electro-hydraulic control system(DEH) were main reasons for the above problems.Through parameter adjustment

X7 standard optimization

control strategy optimization and logic depth investigation

effective preventive measures for the problems were put forward.After start again

the turbine empty load test

loading test and one-time through 168 hours full load continuous trial operation were all successfully completed.The research can provide experience and reference for start-up and commissioning of the same type of steam turbine in newly built power plants.

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BAI Jingping2 1.Department of Power Engineering

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