发电机保护配置_电气工程及其自动化.rar

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  • 更新时间:2016-07-08
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  • 文档路径论文助手网 > 毕业设计 > 电气工程 >

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摘要:发电机的正常运行对保证发电站和输电系统的正常工作起着举足轻重的作用,然而发电机又是非常昂贵的东西,因此,应该针对发电机的各种异常工作状态和各种故障类型,装设稳定可靠的发电机保护装置。

   发电机的故障运行状态有定子绕组匝与匝之间的短路、相与相间短路、只有一相之间的接地、转子励磁电路的励磁电流为零、转子绕组一点接地或两点接地

   发电的异常运行状态主要有:功率超过了发电机的容量造成的三相绕组对称超负荷;由于外部短路而引起的定子绕组过电流;由外部不对称短路或由于突然甩负荷而引起的定子绕组过电压;还有励磁电路发生故障或励磁时间过长造成的转子绕组超负荷; 

    在发电站中水轮机是非常重要的设备,也是相当昂贵的动力设备,为了让水轮发电机组安全可靠稳定的运转,确保发电的质量和输电运行正常工作,根据发电机组在电网系统中所起的不同作用和按照它的容量的大小,需要对发电机组配置相适应的保护装置。本文就水轮机的定子绕组匝间短路和定子绕组相间短路保护为切入点,讲述了发电机定子绕组短路保护的配置原则与方法,配置原则是必须确保配置的装置便宜实用、安全可靠稳定且故障时水轮发电机组遭受损害最小。

   倮姑电站用的是重庆新世纪电气公司生产的EDCS系列电力系统综合自动化装置。我的毕业设计探讨了倮姑小型发电机定子绕组短路保护的经验案例,总结了倮姑电厂1#机组运行十年来的保护装置的运行经验,设计了倮姑电厂发电机定子绕组短路保护装置的配置原则与方法。

关键词:倮姑电厂;发电机保护;差动保护;整定计算

 

ABSTRACT:To ensure the normal work of electric power system and power quality the Safe operation of generator plays a decisive role. at the same time, generator itself is very expensive electrical equipment. therefore, should be based on different kinds of fault and abnormal working state, installation of relay protection device performance improvement.

   Power is fault operation of the state are: the stator winding phase short circuit , stator phase winding interturn short ,the stator winding single-phase grounding,rotor one point grounding or two-point grounding ,the rotor excitation circuit of excitation current disappeared.

   Power is not the normal operation of the state are:because the stator winding of external short circuit current,because the three-phase symmetrical load exceeds the rated capacity generator caused by overload,generator negative sequence current caused by external asymmetrical short-circuit or unbalanced load current, the stator winding overvoltage caused by due to the sudden load rejection,The rotor winding caused by overload Because the excitation circuit fault or strong excitation time,generator reverse power caused by Because the steam turbine suddenly shut down   etc.

   Hydraulic turbine is the most important power equipment in power plants,electrical components are the most precious.In order to ensure that the turbine safety, stable, efficient operation of power system and ensure the normal work and the quality of electric energy.according to the different roles of the different capacity of hydroelectric generating set and played in the power system, it needs to protect configuration of hydroelectric generating set corresponding different.In this paper, starting from the electrical protection mechanical protection and generator turbine aspects,talking about the configuration and characteristics of hydraulic turbine protection.But no matter how configuration,Must ensure the protection of economic reasonable, reliable action and fault of hydrogenerator unit suffered minimal damage.

   Luo Kou power plant is the use of integrated automation EDCS series device in electric power system of Chongqing new century electrical company,this paper studies the development of domestic small generator microcomputer protection current and new achievements,from the operation experience of microcomputer protection device adopts since Luo Gu 1# power plant put into operation,the overall technical scheme of Luo Kou power plant generator microcomputer protection device is proposed.

Keywords:Luo Kou power plant; generator protection ;differential protection ;Setting calculation

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