宋晓辉,李晓飞,蔺奕存,谭详帅,李昭,辛志波,李红智

• 1:西安热工研究院有效公司
• 2:西安益通热工技术服务有限责任公司

摘要(Abstract)：

对二次再热1 000 MW燃煤机组在（极）热态启动时出现切缸及并缸时的典型故障进行了研究。详细分析了3次甩100%负荷及1次甩50%负荷后的4次（极）热态启动过程的主要参数变化，探讨了（极）热态启动过程切缸、2次并缸失败导致长甩负荷、并缸后再热器保护动作及切缸后成功并缸的4个故障实例。结果表明：3缸联合启动方式在（极）热态启动阶段容易造成超高压缸切缸；在并缸阶段，采用数字式电液调节系统中默认的Fastly速率释放超高压调节阀阀限，极易引起负荷超调、轴向位移突增，进而造成机组参数剧烈扰动、并缸失败，甚至长甩负荷；并缸成功后，应及时调整目标负荷，抑制总流量指令的突变；及时增加锅炉燃料、自动调整旁路调节阀开度和稳定机前压力是并缸后安全运行的关键。上述研究结果为机组（极）热态下安全、稳定及快速地启动提供了重要的参考。

关键词(KeyWords)： 二次再热;极热态;切缸;并缸;典型故障

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划项目(2018YFB0604403)~~

作者(Author): 宋晓辉,李晓飞,蔺奕存,谭详帅,李昭,辛志波,李红智

DOI: 10.19666/j.rlfd.202110189

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