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 电厂集控运行全能主值上岗考试题(B) 附答案 一( 填空题 1. 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。 2. 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。 3. 《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。 4. 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。 5. 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。 6. 《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__________. 7. 在做380V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380V保安段并列运行，在恢复380V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。 8. 正常运行中主再热汽温偏差<14?;最高不大于28?。 9. 引风机轴温大于70,联启备用冷却风机，冷却风压小于1000pa,联启备用冷却风机，风机轴温大 于100?跳闸引风机。 10. 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。 11. 所在锅炉运行中，前屏壁温不超过481.1?,高过壁温不超过579.1?，高再壁温不超过600?。 12. 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5——10KPa。 13. 火检冷却风压力低于3500Pa联启备用冷却风机，低于1495PaMFT动作。 14. 所在锅炉的额定(ECR)汽包压力是18.25MPa，排烟温度是121?，给水温度是273.1?，主再 +5热蒸汽温度正常范围541-10，炉前燃油压力正常范围是2.8——3MPa。 15. 滑参数停机目的降低汽缸温度(一般在300?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1——1.5?/min， 再热汽温下降速度不超过2?/min。 16.#7、8低加任一低加水位HH，开#7、8低加旁路电动门，关#8低加入口电动门和#7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。 17.电动给水泵额定转速为_5617rpm,额定功率为5500KW。 field is downwind, brooding House separate from the breeding shed, and ... Building chicken farms must also consider the construction of chicken manure treatment facilities such as septic tanks, methane-generating pit, do not let the chicken manure directly. Five to do a disease prevention and control, do not cut corners. Built into the chicken in chicken farm, will be required to do a variety of vaccine injections and disinfection in chicken farm, do not hold the chance, and do scientific farming. Reasonable problems in building a chicken coop hen house layout, can provide a good environment for chicken, making its full productive potential, so other than in understanding the physiological characteristics of the chicken itself, and must be properly planned and constructed sheds. A chicken layout considerations 1. Sites to choose away from populated areas, traffic convenient, away from the road 2. Gaozao terrain, a lot of sunshine. Winter sun as possible, summer wind, and not after the rain water. Larger, leaving room for development 3. Abundant water resources pollution-free, easy to access, sufficient power is guaranteed 4. Building structure, the economy, saving money, and saving energy, it is facing in accordance with local environmental and physiological condition, lighting is good, easy to ventilation, easy to operate, so conducive to cooling in the summer, to insulation in winter cold 5. Layout of premises should be reasonable, do distinguish between 18.正常运行时，主油泵出口压力为1.44-1.69MPa。隔膜阀上部油压0.5---0.8MPa。 19.你所在机组配置的旁路系统 设计 领导形象设计圆作业设计ao工艺污水处理厂设计附属工程施工组织设计清扫机器人结构设计 容量为30%锅炉最大连续蒸发量，机组启动时规定高低旁最小开度为30%。 20.小汽轮机调速范围为3000--5750转/分钟，电超速转速是6300转/分钟。 21.凝泵变频运行时出口母管压力<0.8MPa(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15%(脉冲信号)，同时联关除氧器上水旁路电动门。 22.EH油压低于11.0MPa联启备用泵，EH油温不得高于60?。 23.汽机热态启动抽真空前先投汽机轴封。 24.除氧器水位低于1100mm给水泵跳闸。 二、简答题 1.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:1.高压电动机使用2500V摇 表 关于同志近三年现实表现材料材料类招标技术评分表图表与交易pdf视力表打印pdf用图表说话 pdf 测量绝缘电阻，正常情况下，每千伏工作电压不低于1MΩ;低压电动机用500V摇表，其绝缘电阻不低于0.5MΩ(指折算至75?时的电阻值)。 2 大修后的大型电动机轴承绝缘，应用1000V摇表测量绝缘，其值不低于0.5MΩ。 3 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50%，否则向上级汇报。 4 容量在500kW及以上高压电动机应测量吸收比(R/R)，其值应大于1.3。 6015 5 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。 6 备用电动机应按定期切换、试验工作 制度 关于办公室下班关闭电源制度矿山事故隐患举报和奖励制度制度下载人事管理制度doc盘点制度下载 要求测其绝缘电阻。 7 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。 2.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:1、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 2、机组跳闸6KV切换厂用电，6KV工作电源开关未跳开 ?、机组跳闸切换厂用电采用串联方式#3、#4机还有同时、串联方式; field is downwind, brooding House separate from the breeding shed, and ... Building chicken farms must also consider the construction of chicken manure treatment facilities such as septic tanks, methane-generating pit, do not let the chicken manure directly. Five to do a disease prevention and control, do not cut corners. Built into the chicken in chicken farm, will be required to do a variety of vaccine injections and disinfection in chicken farm, do not hold the chance, and do scientific farming. Reasonable problems in building a chicken coop hen house layout, can provide a good environment for chicken, making its full productive potential, so other than in understanding the physiological characteristics of the chicken itself, and must be properly planned and constructed sheds. A chicken layout considerations 1. Sites to choose away from populated areas, traffic convenient, away from the road 2. Gaozao terrain, a lot of sunshine. Winter sun as possible, summer wind, and not after the rain water. Larger, leaving room for development 3. Abundant water resources pollution-free, easy to access, sufficient power is guaranteed 4. Building structure, the economy, saving money, and saving energy, it is facing in accordance with local environmental and physiological condition, lighting is good, easy to ventilation, easy to operate, so conducive to cooling in the summer, to insulation in winter cold 5. Layout of premises should be reasonable, do distinguish between ?、操作人必须有一定的处理事故的经验; 3.主机冷油器切换操作及注意事项。 答:冷油器的倒换操作 1、冷油器倒换前应记录润滑油压、油温及油箱油位。 2、开启冷油器(备用冷油器)顶部回油门。 3、开启冷油器注油门向备用冷油器注油。 4、当备用冷油器顶部回油窥视窗有连续油流后，关小回油门。 5、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。 6、逆时针转动切换阀手轮2,3圈，松开套筒与蝶阀手柄，缓慢地转动切换手柄180o，手柄指向待用冷油器位置。 7、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。 8、顺时针旋紧切换阀手轮。 9、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。 10、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。 4.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3300rpm，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10分钟内突降50?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82?时。 g)、汽机轴承金属温度(#l--#4瓦)达112?，发电机(#5、#6瓦)达107?(一期)，汽机推力轴承金属温度任一点达107?。 h)、主机主油箱油位突降至-563mm补油无效时。 i)、机轴承润滑油压降至0.048MPa，启动备用油泵无效时。 j)、、二期主机轴向位移小于-1.0mm或大于+1.0mm时。 field is downwind, brooding House separate from the breeding shed, and ... Building chicken farms must also consider the construction of chicken manure treatment facilities such as septic tanks, methane-generating pit, do not let the chicken manure directly. Five to do a disease prevention and control, do not cut corners. Built into the chicken in chicken farm, will be required to do a variety of vaccine injections and disinfection in chicken farm, do not hold the chance, and do scientific farming. Reasonable problems in building a chicken coop hen house layout, can provide a good environment for chicken, making its full productive potential, so other than in understanding the physiological characteristics of the chicken itself, and must be properly planned and constructed sheds. A chicken layout considerations 1. Sites to choose away from populated areas, traffic convenient, away from the road 2. Gaozao terrain, a lot of sunshine. Winter sun as possible, summer wind, and not after the rain water. Larger, leaving room for development 3. Abundant water resources pollution-free, easy to access, sufficient power is guaranteed 4. Building structure, the economy, saving money, and saving energy, it is facing in accordance with local environmental and physiological condition, lighting is good, easy to ventilation, easy to operate, so conducive to cooling in the summer, to insulation in winter cold 5. Layout of premises should be reasonable, do distinguish between k)、主机胀差大于18.98mm或小于1.0mm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。 5.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1mg/L。 ?水压试验用水温度30-60?。 ?水压试验时汽包壁温度?30?。 ?水压试验时环境温度?5?时应做好防冻 措施 《全国民用建筑工程设计技术措施》规划•建筑•景观全国民用建筑工程设计技术措施》规划•建筑•景观软件质量保证措施下载工地伤害及预防措施下载关于贯彻落实的具体措施 。 ?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 excel标准偏差excel标准偏差函数exl标准差函数国标检验抽样标准表免费下载红头文件格式标准下载 压力表，水压试验压力以汽包就地压力表为准，汽包安装0-40 Mpa的压力表;再热器系统(入口)安装0-10 Mpa的压力表;压力表精度等级不低于0.5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。 field is downwind, brooding House separate from the breeding shed, and ... Building chicken farms must also consider the construction of chicken manure treatment facilities such as septic tanks, methane-generating pit, do not let the chicken manure directly. Five to do a disease prevention and control, do not cut corners. Built into the chicken in chicken farm, will be required to do a variety of vaccine injections and disinfection in chicken farm, do not hold the chance, and do scientific farming. Reasonable problems in building a chicken coop hen house layout, can provide a good environment for chicken, making its full productive potential, so other than in understanding the physiological characteristics of the chicken itself, and must be properly planned and constructed sheds. A chicken layout considerations 1. Sites to choose away from populated areas, traffic convenient, away from the road 2. Gaozao terrain, a lot of sunshine. Winter sun as possible, summer wind, and not after the rain water. Larger, leaving room for development 3. Abundant water resources pollution-free, easy to access, sufficient power is guaranteed 4. Building structure, the economy, saving money, and saving energy, it is facing in accordance with local environmental and physiological condition, lighting is good, easy to ventilation, easy to operate, so conducive to cooling in the summer, to insulation in winter cold 5. Layout of premises should be reasonable, do distinguish between ?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。 10水压试验时关闭高、低压旁路系统。 11超压试验必须在工作压力试验合格后进行。 12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。 13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: 1、降低给水泵转速或停泵; 2、开大连排(关闭进水后，压力仍上升) 3、开启过热器疏水;定排等。 14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。 15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。 16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。 6.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: 1.主、再热蒸汽两侧温差应小于14?，当温差达42?时，运行时间达15分钟或大于42?，应汇报值长故障停机。 2. 主蒸汽与再热蒸汽温差不应大于28?，若主汽温度大于再热汽温42?，不应超过15分钟，机组接近空载时，温差达83?时(应汇报值长，故障停机。 三、画图题 1.请画出你所在机组的B分支厂用电系统一次接线图。 field is downwind, brooding House separate from the breeding shed, and ... Building chicken farms must also consider the construction of chicken manure treatment facilities such as septic tanks, methane-generating pit, do not let the chicken manure directly. Five to do a disease prevention and control, do not cut corners. Built into the chicken in chicken farm, will be required to do a variety of vaccine injections and disinfection in chicken farm, do not hold the chance, and do scientific farming. Reasonable problems in building a chicken coop hen house layout, can provide a good environment for chicken, making its full productive potential, so other than in understanding the physiological characteristics of the chicken itself, and must be properly planned and constructed sheds. A chicken layout considerations 1. Sites to choose away from populated areas, traffic convenient, away from the road 2. Gaozao terrain, a lot of sunshine. Winter sun as possible, summer wind, and not after the rain water. Larger, leaving room for development 3. Abundant water resources pollution-free, easy to access, sufficient power is guaranteed 4. Building structure, the economy, saving money, and saving energy, it is facing in accordance with local environmental and physiological condition, lighting is good, easy to ventilation, easy to operate, so conducive to cooling in the summer, to insulation in winter cold 5. Layout of premises should be reasonable, do distinguish between 2.背画机组冷态启动曲线图。 field is downwind, brooding House separate from the breeding shed, and ... Building chicken farms must also consider the construction of chicken manure treatment facilities such as septic tanks, methane-generating pit, do not let the chicken manure directly. Five to do a disease prevention and control, do not cut corners. Built into the chicken in chicken farm, will be required to do a variety of vaccine injections and disinfection in chicken farm, do not hold the chance, and do scientific farming. Reasonable problems in building a chicken coop hen house layout, can provide a good environment for chicken, making its full productive potential, so other than in understanding the physiological characteristics of the chicken itself, and must be properly planned and constructed sheds. A chicken layout considerations 1. Sites to choose away from populated areas, traffic convenient, away from the road 2. Gaozao terrain, a lot of sunshine. Winter sun as possible, summer wind, and not after the rain water. Larger, leaving room for development 3. Abundant water resources pollution-free, easy to access, sufficient power is guaranteed 4. Building structure, the economy, saving money, and saving energy, it is facing in accordance with local environmental and physiological condition, lighting is good, easy to ventilation, easy to operate, so conducive to cooling in the summer, to insulation in winter cold 5. Layout of premises should be reasonable, do distinguish between