| 660MW机组冷态启动中转速控制异常原因分析 |
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| 引用本文： | 刘佳.660MW机组冷态启动中转速控制异常原因分析[J].自动化博览,2012(7):60-63. |
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| 作者姓名： | 刘佳 |
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| 作者单位： | 大唐许昌龙岗发电有限责任公司 |
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| 摘 要： | 本文描述了660MW超超临界机组某次冷态启动阶段，汽轮机TV—GV阀切换过程中发生转速波动并导致OPC动作、TV不受控等异常现象。通过对热工TV阀控制逻辑SDTV—GV阀切换具体逻辑，剖析汽轮机伺服系统故障引起阀门卡涩、阀门实际位置和受力差等可能导致TV阀失控的原因分析，查明导致汽轮机转速异常波动以及TV阀不受控的原因予以消除，并就防范机组类似安全隐患，提出建议供同行参考。
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| 关 键 词： | 冷态启动 高压主汽门失控 转速波动 OPC动作 阀门卡涩 |
Analyze the Reason on 660MW Unit During the Cold Start-up Speed Control Abnormal |
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| Abstract: | This paper describes some abnormal phenomenon in steam turbine TV-GV switch occuring speed fluctuations,which lead to OPC action and TV valve out of control during 660 MW ultra-supercritical unit in a cold start-up phase.We eliminate the unit safety hazards by analyzing the logics of thermal TV valve control and TV-GV switch.We find out the reasons of steam turbine servo system failure which causes valve jam,the valve of the actual location and force poor may lead to the TV valve out of control. |
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| Keywords: | Cold start-up Throttle Valve out of control Speed fluctuations OPC action Valve jam |
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