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首页 电厂集控运行全能主值上岗考试题(B) 附答案

电厂集控运行全能主值上岗考试题(B) 附答案.doc

电厂集控运行全能主值上岗考试题(B) 附答案

我用思念建了一座房
2018-02-09 0人阅读 举报 0 0 暂无简介

简介:本文档为《电厂集控运行全能主值上岗考试题(B) 附答案doc》,可适用于综合领域

电厂集控运行全能主值上岗考试题(B)附答案电厂集控运行全能主值上岗考试题(B)附答案一(填空题启停机保护用于反应发电机低速运行时可能发生的定子接地和相间短路故障。发电机励磁调节器的自动模式时调节发电机定子电压恒定而手动模式则是维持转子电压恒定。《电气运行规程》规定:隔离开关在操作前必须检查与其对应的断路器在分闸状态严禁带负荷拉、合刀闸。发变组并网和解列前应先投入发变组保护A、B柜中的启停机和误上电保护压板操作结束后切除。厂用变压器不允许长时间并列运行只有在进行厂用电系统倒闸操作时才允许短时并列运行。厂用电系统倒换时必须确保电源侧为同一电源才允许倒换严禁非同期倒换。《电气运行规程》规定:各MCC正常情况下按正常运行方式供电不允许在做V保安段与柴油发电机间的联锁试验时应通过断开母线PT的二次侧小空开来启动低电压继电器。柴油发电机严禁与V保安段并列运行在恢复V保安段母线为正常供电方式时应先解除保安段母线上低电压保护压板再按照先断后合的原则恢复保安段正常供电方式。正常运行中主再热汽温偏差<最高不大于。引风机轴温大于,联启备用冷却风机冷却风压小于pa,联启备用冷却风机风机轴温大于跳闸引风机。增减煤与风量的原则:升负荷时应先加风后加煤,降负荷时应先减煤后减风。所在锅炉运行中前屏壁温不超过,高过壁温不超过高再壁温不超过。所在机组小油枪冷却风为杂用气小油枪火焰电视冷却风为火检冷却风小油枪辅助风压力一般控制在KPa。火检冷却风压力低于Pa联启备用冷却风机低于PaMFT动作。所在锅炉的额定(ECR)汽包压力是MPa排烟温度是给水温度是主再热蒸汽温度正常范围炉前燃油压力正常范围是MPa。滑参数停机目的降低汽缸温度(一般在以下)以便尽早进行检修工作停机前所有检查和准备工作均按正常停机规定执行。滑停过程中主汽温度下降速度控制在min再热汽温下降速度不超过min。#、低加任一低加水位HH开#、低加旁路电动门关#低加入口电动门和#低加出口电动门关上一级正常疏水门开上一级危急疏水门。电动给水泵额定转速为rpm,额定功率为KW。fieldisdownwind,broodingHouseseparatefromthebreedingshed,andBuildingchickenfarmsmustalsoconsidertheconstructionofchickenmanuretreatmentfacilitiessuchasseptictanks,methanegeneratingpit,donotletthechickenmanuredirectlyFivetodoadiseasepreventionandcontrol,donotcutcornersBuiltintothechickeninchickenfarm,willberequiredtodoavarietyofvaccineinjectionsanddisinfectioninchickenfarm,donotholdthechance,anddoscientificfarmingReasonableproblemsinbuildingachickencoophenhouselayout,canprovideagoodenvironmentforchicken,makingitsfullproductivepotential,sootherthaninunderstandingthephysiologicalcharacteristicsofthechickenitself,andmustbeproperlyplannedandconstructedshedsAchickenlayoutconsiderationsSitestochooseawayfrompopulatedareas,trafficconvenient,awayfromtheroadGaozaoterrain,alotofsunshineWintersunaspossible,summerwind,andnotaftertherainwaterLarger,leavingroomfordevelopmentAbundantwaterresourcespollutionfree,easytoaccess,sufficientpowerisguaranteedBuildingstructure,theeconomy,savingmoney,andsavingenergy,itisfacinginaccordancewithlocalenvironmentalandphysiologicalcondition,lightingisgood,easytoventilation,easytooperate,soconducivetocoolinginthesummer,toinsulationinwintercoldLayoutofpremisesshouldbereasonable,dodistinguishbetween正常运行时主油泵出口压力为MPa。隔膜阀上部油压MPa。你所在机组配置的旁路系统设计容量为锅炉最大连续蒸发量机组启动时规定高低旁最小开度为。小汽轮机调速范围为转分钟电超速转速是转分钟。凝泵变频运行时出口母管压力<MPa(压力开关)时联锁启动工频备用凝泵当MFT动作时除氧器水位调节阀自动关至(脉冲信号)同时联关除氧器上水旁路电动门。EH油压低于MPa联启备用泵EH油温不得高于。汽机热态启动抽真空前先投汽机轴封。除氧器水位低于mm给水泵跳闸。二、简答题我公司对电动机的绝缘电阻有何规定,在测量你所在机组A凝结水泵电机绝缘电阻时应注意哪些危险点。答:高压电动机使用V摇表测量绝缘电阻正常情况下每千伏工作电压不低于MΩ低压电动机用V摇表其绝缘电阻不低于MΩ(指折算至时的电阻值)。大修后的大型电动机轴承绝缘应用V摇表测量绝缘其值不低于MΩ。所测电动机绝缘电阻虽高于上述值但与前次相同条件下比较所测值不得低于上次所测值的否则向上级汇报。容量在kW及以上高压电动机应测量吸收比(RR)其值应大于。电动机停用一周且未经检修在送电或启动前可不测其绝缘电阻但遇有电动机进水、被水淋、进汽等异常情况仍需测其绝缘电阻。备用电动机应按定期切换、试验工作制度要求测其绝缘电阻。所测电动机的绝缘电阻值应及时登记在《电气设备绝缘电阻登记本》上。请简述在厂用电切换操作中存在哪些危险点,应如何预控,答:、非同期并列正常运行中闭锁开关STK必须投“闭锁”位置操作之前应检查两侧电源系统的运行方式。应确保在一个电源系统、机组跳闸KV切换厂用电KV工作电源开关未跳开、机组跳闸切换厂用电采用串联方式#、#机还有同时、串联方式fieldisdownwind,broodingHouseseparatefromthebreedingshed,andBuildingchickenfarmsmustalsoconsidertheconstructionofchickenmanuretreatmentfacilitiessuchasseptictanks,methanegeneratingpit,donotletthechickenmanuredirectlyFivetodoadiseasepreventionandcontrol,donotcutcornersBuiltintothechickeninchickenfarm,willberequiredtodoavarietyofvaccineinjectionsanddisinfectioninchickenfarm,donotholdthechance,anddoscientificfarmingReasonableproblemsinbuildingachickencoophenhouselayout,canprovideagoodenvironmentforchicken,makingitsfullproductivepotential,sootherthaninunderstandingthephysiologicalcharacteristicsofthechickenitself,andmustbeproperlyplannedandconstructedshedsAchickenlayoutconsiderationsSitestochooseawayfrompopulatedareas,trafficconvenient,awayfromtheroadGaozaoterrain,alotofsunshineWintersunaspossible,summerwind,andnotaftertherainwaterLarger,leavingroomfordevelopmentAbundantwaterresourcespollutionfree,easytoaccess,sufficientpowerisguaranteedBuildingstructure,theeconomy,savingmoney,andsavingenergy,itisfacinginaccordancewithlocalenvironmentalandphysiologicalcondition,lightingisgood,easytoventilation,easytooperate,soconducivetocoolinginthesummer,toinsulationinwintercoldLayoutofpremisesshouldbereasonable,dodistinguishbetween、操作人必须有一定的处理事故的经验主机冷油器切换操作及注意事项。答:冷油器的倒换操作、冷油器倒换前应记录润滑油压、油温及油箱油位。、开启冷油器(备用冷油器)顶部回油门。、开启冷油器注油门向备用冷油器注油。、当备用冷油器顶部回油窥视窗有连续油流后关小回油门。、开启备用冷油器冷却水进水门出水门处于调整位将备用冷油器冷却水侧空气排尽。、逆时针转动切换阀手轮,圈松开套筒与蝶阀手柄缓慢地转动切换手柄o手柄指向待用冷油器位置。、监视好润滑油压不应下降否则立即启动交流或直流油泵运行同时立即恢复原方式运行。、顺时针旋紧切换阀手轮。、关闭停运冷油器进、出水门调整好投入冷油器的冷却水维持油温正常。、当一台冷油器单独运行不能维持油温时应按上述步骤将切换手柄置中间位投入两台冷油器并列运行。发生哪些情况应破坏真空紧急停机如何操作,发生下列情况之一时应立即破坏真空紧急停机:a)、机组转速迅速上升至rpm危急保安器未动作时。b)、机组突然发生强烈振动时。c)、汽轮机发生水冲击或主、再热汽温在分钟内突降时。d)、清楚地听到机组内部有金属磨擦声和撞击声时。e)、轴封磨擦发生火花时。f)、机组任一轴承断油、冒烟或轴承回油温度达时。g)、汽机轴承金属温度(#l#瓦)达发电机(#、#瓦)达(一期)汽机推力轴承金属温度任一点达。h)、主机主油箱油位突降至mm补油无效时。i)、机轴承润滑油压降至MPa启动备用油泵无效时。j)、、二期主机轴向位移小于mm或大于mm时。fieldisdownwind,broodingHouseseparatefromthebreedingshed,andBuildingchickenfarmsmustalsoconsidertheconstructionofchickenmanuretreatmentfacilitiessuchasseptictanks,methanegeneratingpit,donotletthechickenmanuredirectlyFivetodoadiseasepreventionandcontrol,donotcutcornersBuiltintothechickeninchickenfarm,willberequiredtodoavarietyofvaccineinjectionsanddisinfectioninchickenfarm,donotholdthechance,anddoscientificfarmingReasonableproblemsinbuildingachickencoophenhouselayout,canprovideagoodenvironmentforchicken,makingitsfullproductivepotential,sootherthaninunderstandingthephysiologicalcharacteristicsofthechickenitself,andmustbeproperlyplannedandconstructedshedsAchickenlayoutconsiderationsSitestochooseawayfrompopulatedareas,trafficconvenient,awayfromtheroadGaozaoterrain,alotofsunshineWintersunaspossible,summerwind,andnotaftertherainwaterLarger,leavingroomfordevelopmentAbundantwaterresourcespollutionfree,easytoaccess,sufficientpowerisguaranteedBuildingstructure,theeconomy,savingmoney,andsavingenergy,itisfacinginaccordancewithlocalenvironmentalandphysiologicalcondition,lightingisgood,easytoventilation,easytooperate,soconducivetocoolinginthesummer,toinsulationinwintercoldLayoutofpremisesshouldbereasonable,dodistinguishbetweenk)、主机胀差大于mm或小于mm时。l)、主机油系统着火不能及时扑灭严重威胁机组安全运行时。m)、发电机冒烟着火时。破坏真空紧急停机的操作步骤a)、手按停机按钮或手打危急遮断器检查高、中压主汽门、调速汽门、高排逆止门及各段抽汽电动门和逆止门均关闭发电机解列负荷到零转速下降。b)、启动交流润滑油泵检查油压正常。c)、检查有关疏水联锁打开但主、再热汽管道上的疏水阀应强制关闭。d)、解除真空泵联锁停止真空泵开启真空破坏门。e)、启动电动给水泵停止汽动给水泵。f)、确认四抽用户全部切至辅供汽查轴封压力正常。g)、记录机组惰走时间倾听机组内部声音及振动。h)、注意维持除氧器、凝汽器水位正常开启低压缸喷水阀。i)、注意监视轴向位移、胀差、振动、瓦温的变化情况。j)、其它操作按正常停机步骤进行。锅炉过热器水压试验的范围及安全注意事项。范围:自给水操作台至汽机自动主汽门。安全注意事项:水压试验用水水质合格。水中氯离子(CL)含量小于mgL。水压试验用水温度。水压试验时汽包壁温度。水压试验时环境温度时应做好防冻措施。水压试验时停止炉内外一切承压部件检修工作工作人员撤离。必须有防止超压的紧急泄压放水措施并保证其可靠。有两块以上经校验合格的标准压力表水压试验压力以汽包就地压力表为准汽包安装Mpa的压力表再热器系统(入口)安装Mpa的压力表压力表精度等级不低于级并经校验合格在试验过程中汽包就地压力表与控制室应保持通讯联络专人就地监视压力表CRT上汽包压力表、再热蒸汽压力表、及立盘上汽包压力表校验合格并投入。升压过程中如发现阀门、管道泄漏、压力表不准确、压力不上升等现象应立即停止升压并降低压力查明原因处理。fieldisdownwind,broodingHouseseparatefromthebreedingshed,andBuildingchickenfarmsmustalsoconsidertheconstructionofchickenmanuretreatmentfacilitiessuchasseptictanks,methanegeneratingpit,donotletthechickenmanuredirectlyFivetodoadiseasepreventionandcontrol,donotcutcornersBuiltintothechickeninchickenfarm,willberequiredtodoavarietyofvaccineinjectionsanddisinfectioninchickenfarm,donotholdthechance,anddoscientificfarmingReasonableproblemsinbuildingachickencoophenhouselayout,canprovideagoodenvironmentforchicken,makingitsfullproductivepotential,sootherthaninunderstandingthephysiologicalcharacteristicsofthechickenitself,andmustbeproperlyplannedandconstructedshedsAchickenlayoutconsiderationsSitestochooseawayfrompopulatedareas,trafficconvenient,awayfromtheroadGaozaoterrain,alotofsunshineWintersunaspossible,summerwind,andnotaftertherainwaterLarger,leavingroomfordevelopmentAbundantwaterresourcespollutionfree,easytoaccess,sufficientpowerisguaranteedBuildingstructure,theeconomy,savingmoney,andsavingenergy,itisfacinginaccordancewithlocalenvironmentalandphysiologicalcondition,lightingisgood,easytoventilation,easytooperate,soconducivetocoolinginthesummer,toinsulationinwintercoldLayoutofpremisesshouldbereasonable,dodistinguishbetween一次汽系统工作压力试验时解列过热器出口PCV阀、过热器、汽包安全阀。超压试验时解列过热器出口PCV阀、汽包水位计、过热器、汽包安全阀并加闭塞器。水压试验时关闭高、低压旁路系统。超压试验必须在工作压力试验合格后进行。当压力升至(一次汽系、二次汽系统)额定工作压力以上时禁止检查承压部件。专人负责升压严禁超压严格控制升压速度如压力上升较快有超压危险可依次采取以下措施:、降低给水泵转速或停泵、开大连排(关闭进水后压力仍上升)、开启过热器疏水定排等。升压过程中不得做其他工作如发现个别阀门漏水或没关严如操作该门必须得到现场指挥的许可。本体水压试验时严密注意再热器压力防止再热器发生超压。试验结束泄压后通知热工恢复各阀门及冲洗表管、取样管恢复水位计、安全阀、试验堵板等。规程对机组正常运行过程中的主、再热汽温偏差有何要求,如何采取措施减少主再热汽温偏差。答:主、再热蒸汽两侧温差应小于当温差达时运行时间达分钟或大于应汇报值长故障停机。主蒸汽与再热蒸汽温差不应大于若主汽温度大于再热汽温不应超过分钟机组接近空载时温差达时(应汇报值长故障停机。三、画图题请画出你所在机组的B分支厂用电系统一次接线图。fieldisdownwind,broodingHouseseparatefromthebreedingshed,andBuildingchickenfarmsmustalsoconsidertheconstructionofchickenmanuretreatmentfacilitiessuchasseptictanks,methanegeneratingpit,donotletthechickenmanuredirectlyFivetodoadiseasepreventionandcontrol,donotcutcornersBuiltintothechickeninchickenfarm,willberequiredtodoavarietyofvaccineinjectionsanddisinfectioninchickenfarm,donotholdthechance,anddoscientificfarmingReasonableproblemsinbuildingachickencoophenhouselayout,canprovideagoodenvironmentforchicken,makingitsfullproductivepotential,sootherthaninunderstandingthephysiologicalcharacteristicsofthechickenitself,andmustbeproperlyplannedandconstructedshedsAchickenlayoutconsiderationsSitestochooseawayfrompopulatedareas,trafficconvenient,awayfromtheroadGaozaoterrain,alotofsunshineWintersunaspossible,summerwind,andnotaftertherainwaterLarger,leavingroomfordevelopmentAbundantwaterresourcespollutionfree,easytoaccess,sufficientpowerisguaranteedBuildingstructure,theeconomy,savingmoney,andsavingenergy,itisfacinginaccordancewithlocalenvironmentalandphysiologicalcondition,lightingisgood,easytoventilation,easytooperate,soconducivetocoolinginthesummer,toinsulationinwintercoldLayoutofpremisesshouldbereasonable,dodistinguishbetween背画机组冷态启动曲线图。fieldisdownwind,broodingHouseseparatefromthebreedingshed,andBuildingchickenfarmsmustalsoconsidertheconstructionofchickenmanuretreatmentfacilitiessuchasseptictanks,methanegeneratingpit,donotletthechickenmanuredirectlyFivetodoadiseasepreventionandcontrol,donotcutcornersBuiltintothechickeninchickenfarm,willberequiredtodoavarietyofvaccineinjectionsanddisinfectioninchickenfarm,donotholdthechance,anddoscientificfarmingReasonableproblemsinbuildingachickencoophenhouselayout,canprovideagoodenvironmentforchicken,makingitsfullproductivepotential,sootherthaninunderstandingthephysiologicalcharacteristicsofthechickenitself,andmustbeproperlyplannedandconstructedshedsAchickenlayoutconsiderationsSitestochooseawayfrompopulatedareas,trafficconvenient,awayfromtheroadGaozaoterrain,alotofsunshineWintersunaspossible,summerwind,andnotaftertherainwaterLarger,leavingroomfordevelopmentAbundantwaterresourcespollutionfree,easytoaccess,sufficientpowerisguaranteedBuildingstructure,theeconomy,savingmoney,andsavingenergy,itisfacinginaccordancewithlocalenvironmentalandphysiologicalcondition,lightingisgood,easytoventilation,easytooperate,soconducivetocoolinginthesummer,toinsulationinwintercoldLayoutofpremisesshouldbereasonable,dodistinguishbetween

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