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针对当前大容量锅炉汽温、受热面壁温监测方面存在的问题进行了分析和探讨,并提出改进建议,可供电厂在基建设计阶段及生产运行中参考. 相似文献
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新的锅炉高温对流受热面壁温计算软件的实际应用 总被引:3,自引:0,他引:3
对受热面壁温计算的经典方法进行改进与完善,并在此基础上编制应用软件,用此软件对一台670t/h锅炉高温过热器频繁超温爆管的原因进行了计算分析,提出了简单、有效的改造方案,改造后高温过热器没有再发生过超温爆管事故,保证了机组的安全经济运行。试验数据及运行结果表明,改进后的壁温计算方法及计算结果准确可靠,具有推广应用价值。 相似文献
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针对华电中宁发电有限责任公司锅炉过热器出口金属壁温超温问题,根据实际情况进行原因分析,制定了改进方案,实施后取得了满意的效果.应用结果表明:调整燃烧工况,运行中对一次风压和二次风量进行实时控制,可达到降低锅炉过热器金属壁温的目的. 相似文献
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Yuan Chen Westergard L. Mojarradi M.M. Johnson T.W. Cozy R.S. Billman C. Burke G.R. Kolawa E.A. 《Device and Materials Reliability, IEEE Transactions on》2006,6(2):146-153
A design for reliability methodology has been developed for electronics for low-temperature applications. A hot carrier aging (HCA) lifetime projection model is proposed to take into account the HCA impact on technology, analysis of parametric degradation versus critical circuit path degradation, transistor bias profile, transistor substrate current profile, and operating temperature profile. The most applicable transistor size can be determined in order to meet the reliability requirements of the electronics operating under low temperatures. This methodology and approach can also be applied to other transistor-level failure and/or degradation mechanisms for applications with varying temperature ranges. 相似文献
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《Power Delivery, IEEE Transactions on》1998,13(1):73-77
IEEE Standard 1344, Synchrophasors for Power Systems, was completed in 1995. It sets parameters required to ensure that phasor measurement will be made and communicated in a consistent manner. It specifies requirements for the timing signal used for phasor synchronization and the time code needed for input to a measurement unit. GPS is the recommended time source and IRIG-B is the basic format used for time communication. The standard requires correlating phasors computed from unsynchronized and synchronized sampling to a common basis. Timetagging accurately and consistently is essential for wide area comparison of phase. The standard specifies information exchange and control message formats. These include data output, configuration, and command messages. It includes 7 annexes that discuss the concepts covered in the body of the standard 相似文献
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分析了GIS断路器故障原因,介绍了检验过程与充气检查、监督情况,并提供一些可借鉴的成功经验。 相似文献