火电厂汽轮机主油箱液位测量缺陷分析及处理
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摘要
针对某火电厂4台机组汽轮机主油箱油位测量过程中出现跳变甚至变坏点的问题,从工作原理、使用环境、介质特性等方面分析原因,认为主油箱内部油位波动较大以及存在较强磁场是导致问题的主要原因,提出将汽轮机主油箱油位测量方式改为差压式测量的处理措施,处理后,测量精度、可靠性、稳定性均满足"二十五项重点要求"的相关要求,4台机组主油箱油位低跳机保护投入。
According to the problem of four power plant units turbine main oil tank level measurement exists jump even worse,this paper analyzes the reasons from the aspects of working principle, operating environment and media characteristics,thinking the main oil tank internal oil level fluctuation and strong magnetic field are the reasons for the problem, it is proposed to change the measurement method of main tank oil level into differential pressure measurement.After the transformation,the measurement accuracy, reliability and stability meet the relevant requirements, and the protection input of the low oil level stop running for four units.
According to the problem of four power plant units turbine main oil tank level measurement exists jump even worse,this paper analyzes the reasons from the aspects of working principle, operating environment and media characteristics,thinking the main oil tank internal oil level fluctuation and strong magnetic field are the reasons for the problem, it is proposed to change the measurement method of main tank oil level into differential pressure measurement.After the transformation,the measurement accuracy, reliability and stability meet the relevant requirements, and the protection input of the low oil level stop running for four units.
引文
[1]王林晖.因主油箱油位测量引发的误停机事故分析[J].华电技术,2012,34(1):54-56.
[2]邵文.导波雷达液位计在方家山核电站的应用[J].仪器仪表用户, 2011,18(3):96-98.
[3]李宗方.磁质伸缩液位计在测量液位中的应用[J].化学工程与装备,2013(7):86-92.
[4]谢芳.磁致伸缩式液位计的原理和应用[J].石油化工自动化,2012,48(6):60-63.
[5]李前敏,张仁丽,柏毅辉,等.贵州电力行业火电厂主油箱油位测量方式及保护投入概况[J].贵州电力技术,2016,19(1):14-17.
[2]邵文.导波雷达液位计在方家山核电站的应用[J].仪器仪表用户, 2011,18(3):96-98.
[3]李宗方.磁质伸缩液位计在测量液位中的应用[J].化学工程与装备,2013(7):86-92.
[4]谢芳.磁致伸缩式液位计的原理和应用[J].石油化工自动化,2012,48(6):60-63.
[5]李前敏,张仁丽,柏毅辉,等.贵州电力行业火电厂主油箱油位测量方式及保护投入概况[J].贵州电力技术,2016,19(1):14-17.