联合循环机组微机保护应用研究

发布时间：2018-04-12 21:24

  本文选题：燃气-蒸汽联合循环 + 微机型保护装置　； 参考：《郑州大学》2014年硕士论文

【摘要】：燃气发电作为清洁能源对环境保护,减少大气污染日益变得重要。燃气发电厂中的发电机和变压器作为发电厂最为重要的电气设备,配置可靠灵敏的微机保护设备,是满足安全稳定生产的重要要求。燃气-蒸汽联合循环发电机组作为一种能源综合利用技术,具有热效率高、环保性能好等优点,在燃气发电厂得到广泛应用。在具体的现场实施中,国内燃气发电厂使用了多种不同原理的国外微机保护系统。由于热力系统的差异性,会造成燃气-蒸汽联合循环机组发变组保护配置具有特殊性。本文通过对燃气-蒸汽联合循环发电机组启动过程的特殊性的分析,明晰了燃机运行方式的不同对发变组保护的影响。介绍了各种保护的硬件配置情况和原理：分析了发电机保护的实施思路和保护计算方法、发变组保护装置的调试方法和生产运行过程中出现的典型案例。着重分析研究了燃气发电厂中西门子的7UM622燃气机组发变组保护装置和国电南自的DGT801发变组保护装置,通过对发变组保护国产化的研讨,提高了对发变组保护设计理念的认识。最后,结合两种不同厂家发变组保护装置原理,提出了用南自的DGT801系列微机保护装置替代西门子7UM622发变组保护装置的方案和建议。针对西门子燃气发电厂发电机保护国产化设计问题的研究,可以为进一步促进燃气-蒸汽联合循环机组保护全面国产化和优化打下基础,有利于作为清洁能源的燃气发电厂安全稳定生产。
[Abstract]:As clean energy, gas power generation is becoming more and more important for environmental protection and reducing air pollution.Generators and transformers in gas power plants are the most important electrical equipment in power plants. It is an important requirement to meet the requirements of safe and stable production with reliable and sensitive microcomputer protection equipment.As a comprehensive energy utilization technology, the gas-steam combined cycle generator has many advantages, such as high thermal efficiency and good environmental performance, and has been widely used in gas-fired power plants.In the field implementation, the domestic gas power plant uses a variety of different principles of the foreign microcomputer protection system.Because of the difference of thermodynamic system, the protection configuration of gas-steam combined cycle generating and transformer unit has particularity.Based on the analysis of the particularity of the start-up process of gas-steam combined cycle generator set, the influence of different operation modes of gas turbine on the protection of generator and transformer unit is clarified in this paper.This paper introduces the hardware configuration and principle of various kinds of protection, analyzes the train of thought and calculation method of generator protection, the debugging method of generator transformer protection device and the typical cases in production and operation.The protection device of Siemens 7UM622 gas generating unit in gas power plant and the DGT801 generation and transformer unit of Guodian Nanzi are analyzed and studied emphatically. Through the discussion on the localization of generation and transformer unit protection, the understanding of the design concept of generation and transformer unit protection is improved.Finally, combined with the principle of two different kinds of generator-transformer group protection devices from two different manufacturers, the scheme and suggestion of replacing Siemens 7UM622 generator and transformer group protection device with Nanzi DGT801 series microcomputer protection device are put forward.The research on the domestic design of generator protection in Siemens gas power plant can lay a foundation for further promoting the comprehensive localization and optimization of the protection of gas-steam combined cycle units.It is beneficial to the safe and stable production of gas power plant as clean energy.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM611.31;TM774
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本文编号：1741489