公开(公告)号：US4552099A

公开(公告)日：1985-11-12

申请号：US664640

申请日：1984-10-25

申请人： Alan Martens ,  Milton M. Hobbs ,  Bennie E. Snow

发明人： Alan Martens ,  Milton M. Hobbs ,  Bennie E. Snow

IPC分类号： F22D5/32 ,  F01K23/10 ,  F22D5/26

CPC分类号： F01K23/108 ,  Y02E20/16

摘要： Boiler feedpump net positive suction head (NPSH) control is performed in a heat recovery steam generator including a deaerator inserted between steam turbine condensate and steam boiler. To this effect apparatus is provided responsive to temperature at the output of the deaerator, to fluid flow therefrom, and to temperature at the input of the boiler feedpump for providing a signal representative of the anticipated suction head pressure, and the NPSH margin is derived by comparison with actual pressure to control the pegging valve, or other heat source control to the deaerator.

摘要翻译： 锅炉给水泵净吸头（NPSH）控制在包括蒸汽轮机冷凝水和蒸汽锅炉之间的除气器的热回收蒸汽发生器中进行。 为此，设备响应于脱气器输出端的温度，流体的流量以及锅炉给水泵的输入端的温度而提供，以提供表示预期吸头压力的信号，并且NPSH余量由 与实际压力比较来控制夹紧阀，或其他热源控制到除气器。

公开(公告)号：US4561254A

公开(公告)日：1985-12-31

申请号：US664641

申请日：1984-10-25

申请人： Alan Martens ,  Milton M. Hobbs ,  Gerald A. Myers

发明人： Alan Martens ,  Milton M. Hobbs ,  Gerald A. Myers

IPC分类号： F01D19/00 ,  F01K9/04 ,  F01K13/02

CPC分类号： F01K9/04

摘要： In a combined steam generator-turbine system, a drain type is provided in front of the stop valve to drain the first steam supply with the stop valve closed until the temperature of the valve and/or the temperature of the steam exceeds the temperature of saturation by a predetermined amount, and logic circuitry is provided to generate permissive signals which combine to allow successive admission of steam to the gland seal and to the steam turbine.

摘要翻译： 在组合的蒸汽发生器 - 涡轮机系统中，在截止阀前面设置有排水类型，以排出第一蒸汽源，截止阀关闭，直到阀的温度和/或蒸汽的温度超过饱和温度 并且提供逻辑电路以产生允许信号，其合并以允许蒸汽连续地进入到压盖密封件和蒸汽涡轮机。

公开(公告)号：US3965674A

公开(公告)日：1976-06-29

申请号：US495693

申请日：1974-08-08

申请人： Milton M. Hobbs ,  Roy Kiscaden

发明人： Milton M. Hobbs ,  Roy Kiscaden

IPC分类号： F01K23/10

CPC分类号： F01K23/105 ,  Y02E20/16

摘要： A combined cycle electric power plant includes gas and steam turbines and steam generators and a digital/analog control system. The control system includes a digital automatic control and an analog backup control which are interfaced to control the gas turbine fuel flow for speed and load control purposes. The backup control includes a speed/load control which functions on a feedforward speed control basis without speed feedback correction and on a feedforward load control basis without load feedback correction. The forward speed/load control channel is subjected to high and low limit action and the fuel reference output is applied to a feedback type fuel control, i.e. a throttle valve positioning control. Limit action is also placed on the forward speed/load control channel by a temperature control, a surge control and an overspeed control.

摘要翻译： 联合循环发电厂包括燃气和蒸汽涡轮机和蒸汽发生器以及数字/模拟控制系统。 控制系统包括数字自动控制和模拟备份控制，其连接以控制用于速度和负载控制目的的燃气轮机燃料流。 备用控制包括在没有速度反馈校正的前馈速度控制基础上运行的速度/负载控制，以及在没有负载反馈校正的前馈负载控制的基础上。 前进速度/负载控制通道受到高低限制作用，燃料基准输出被应用于反馈式燃料控制，即节气门定位控制。 通过温度控制，浪涌控制和超速控制，还可以对前进速度/负载控制通道进行极限动作。

公开(公告)号：US3979904A

公开(公告)日：1976-09-14

申请号：US495701

申请日：1974-08-08

申请人： Milton M. Hobbs

发明人： Milton M. Hobbs

IPC分类号： F02C9/40 ,  F02C7/26 ,  F02C9/06 ,  F02C9/08 ,  F02C9/10

CPC分类号： F02C9/40

摘要： A combined cycle power plant includes gas and steam turbines and steam generators and a digital/analog control system. A megawatt load control system varies a fuel control signal to govern a detected power output according to a reference value. The fuel control signal determines the flow rate of fuel to the combustor of a gas turbine-generator that is adapted to use gas and liquid fuels. A flow divider comprises a plurality of gear pumps connected to rotate with a common shaft, and distributes liquid fuel equally to a plurality of nozzles of the combustor, the total liquid fuel flow to the nozzles being related to the shaft speed. The shaft speed is detected and a signal representative of the total liquid fuel flow is generated in response to the detected speed. During fuel transfer a liquid fuel valve is positioned to govern the detected liquid fuel flow according to a desired flow such that the power output that results when both the gas and liquid fuels flow to the combustor is dependent upon the level of the fuel control signal and independent of the relative levels of the gas and liquid fuel flows. Undesirable power output disturbances that typically occur during fuel transfer due to nonlinearities of fuel system components are reduced.

摘要翻译： 联合循环发电厂包括燃气和蒸汽轮机和蒸汽发生器以及数字/模拟控制系统。 兆瓦负载控制系统根据参考值改变燃料控制信号以控制检测到的功率输出。 燃料控制信号确定适于使用气体和液体燃料的燃气轮机 - 发电机的燃烧器的燃料流量。 分流器包括连接成与公共轴一起旋转的多个齿轮泵，并且将液体燃料均等地分配到燃烧器的多个喷嘴，到喷嘴的总液体燃料流与轴速度有关。 检测轴速度，并且响应于检测到的速度产生表示总液体燃料流量的信号。 在燃料传输期间，液体燃料阀被定位成根据期望的流量来控制检测到的液体燃料流，使得当气体和液体燃料都流到燃烧器时产生的功率输出取决于燃料控制信号的水平， 独立于气体和液体燃料流的相对水平。 由于燃料系统部件的非线性，通常在燃料转移期间发生不期望的功率输出干扰。

公开(公告)号：US3956883A

公开(公告)日：1976-05-18

申请号：US495725

申请日：1974-08-08

申请人： Joel M. Anderson ,  Kermit R. Wescott ,  Milton M. Hobbs ,  Roy W. Kiscaden

发明人： Joel M. Anderson ,  Kermit R. Wescott ,  Milton M. Hobbs ,  Roy W. Kiscaden

IPC分类号： F01D19/00 ,  F01K23/10 ,  F02C9/28 ,  F02C7/26

CPC分类号： F02C9/28 ,  F01D19/00 ,  F01K23/105 ,  F05D2270/112 ,  Y02E20/16

摘要： A combined cycle electric power plant includes gas and steam turbines and steam generators and a digital/analog control system. An automatic digital portion of the control system functions with temperature and other detectors to provide temperature limit control for the gas turbines through the fuel valve position controls provided therefor. A blade path temperature reference is generated as a function of combustor shell pressure during the startup and load modes of operation, and during the load mode of operation the blade path temperature reference is further generated with dependence on the actual turbine exhaust temperature. In particular, the turbine blade path temperature is allowed to rise under loading operation until it reaches a limit value defined by a predetermined combustor shell pressure characteristic curve. Thereafter, the blade path temperature reference is permitted to rise to a higher and final limit value which exists when the actual exhaust temperature equals a limit temperature value defined by another combustor shell pressure characteristic curve which is higher than the first curve.

摘要翻译： 联合循环发电厂包括燃气和蒸汽涡轮机和蒸汽发生器以及数字/模拟控制系统。 控制系统的自动数字部分与温度和其他检测器一起工作，通过为此提供的燃料阀位置控制器为燃气轮机提供温度限制控制。 在启动和负载运行模式期间，产生刀片路径温度参考作为燃烧器壳体压力的函数，并且在负载运行模式期间，根据实际的涡轮排气温度进一步产生叶片路径温度参考。 特别地，允许涡轮机叶片路径温度在加载操作下升高直到其达到由预定的燃烧器壳体压力特性曲线限定的极限值。 此后，允许叶片路径温度基准上升到当实际排气温度等于由高于第一曲线的另一燃烧器壳体压力特性曲线限定的极限温度值时存在的较高和最终极限值。