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公开(公告)号：US4619224A
公开(公告)日：1986-10-28
申请号：US765437
申请日：1985-08-14
申请人： Atsushi Takita , Akira Sugano , Naganobu Honda
发明人： Atsushi Takita , Akira Sugano , Naganobu Honda
摘要： An apparatus for controlling the drum water level of a drum boiler prevents the boiler system from being tripped off which would otherwise be caused by an excessive fall in the drum water level immediately after the start of load runback, by increasing the real feed water flow rate in such a manner that a feed water flow rate demand signal obtained from the drum water level deviation is corrected by a feed water flow rate increment signal obtained from the amount of load reduction (load demand--load reference after load runback) at the time of load runback. In addition, the fact that the drum water level stops falling and starts to rise is detected, and the feed water flow rate demand signal is adjusted so as to take a medium value between the real feed water flow rate and the real main steam flow rate, thereby preventing the boiler system from being tripped off which would otherwise be caused by an excessive rise in the drum water level.
摘要翻译： 用于控制滚筒锅炉的滚筒水位的装置防止锅炉系统脱扣，否则将由负载回流开始后立即滚筒水位的过度下降引起，通过增加实际给水流量 使得从滚筒水位偏差获得的给水流量需求信号通过从负载减少量（负载回流之后的负载需求 - 负载基准）获得的进给水流量增量信号来校正， 负载回流。 另外，检测出滚筒水位停止下降并开始上升的事实，并且调节给水流量需求信号，使得在实际给水流量与实际主蒸汽流量之间取中间值 ，从而防止锅炉系统跳闸，否则这将由鼓水位的过度上升引起。
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公开(公告)号：US4153198A
公开(公告)日：1979-05-08
申请号：US764647
申请日：1977-02-01
申请人： Yurio Eki , Yasuhiro Tennichi , Naganobu Honda
发明人： Yurio Eki , Yasuhiro Tennichi , Naganobu Honda
CPC分类号： F01D17/24
摘要： An electro-hydraulic governer employing a duplex digital controller system for the optimum speed control of a steam turbine running with increasing speed in the starting stage or under load. Each of the digital controllers is operable with both a control mode and a stand-by mode, and when one of the digital controllers is placed in the control mode for controlling the rotating speed of the turbine, the other is placed in the stand-by mode to prepare for possible failure of the controller operating with the control mode. A failure detecting unit detects failure of the digital controller operating with the control mode. An output switching unit disconnects the faulty digital controller from the control system and switches over the operating mode of the stand-by digital controller from the stand-by mode to the control mode for the continuous control of the rotating speed of the turbine. A display is provided on an operator's console to display the outputs of these two digital controllers, and the faulty digital controller is detected by non-coincidence of the displayed information. The faulty digital controller having been disconnected from the control system by the output switching unit is repaired as quickly as possible, and after necessary repair, it stands by to prepare for possible failure of the other controller operating with the control mode.
摘要翻译： 一种采用双工数字控制器系统的电动液压操纵器，用于在起动阶段或负载下以增加的速度运行的汽轮机的最佳速度控制。 每个数字控制器可以同时操作控制模式和待机模式，并且当其中一个数字控制器处于用于控制涡轮转速的控制模式时，另一个被置于待机状态 模式以准备控制器操作的控制模式可能的故障。 故障检测单元检测以控制模式操作的数字控制器的故障。 输出切换单元将故障的数字控制器与控制系统断开，并将待机数字控制器的操作模式从待机模式切换到用于连续控制涡轮机转速的控制模式。 在操作员控制台上提供一个显示器来显示这两个数字控制器的输出，并且通过显示的信息的不一致来检测故障的数字控制器。 已经通过输出切换单元与控制系统断开连接的故障数字控制器被尽可能快地修复，并且在必要的修理之后，为了准备其他控制器以控制模式操作的可能的故障。
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公开(公告)号：US4558227A
公开(公告)日：1985-12-10
申请号：US618676
申请日：1984-06-08
摘要： A method of controlling the operation of a thermoelectric power generating plant, in which the operation of the steam generating equipment and the turbine is controlled in accordance with the plant operation parameters obtained from given patterns of start up and operation of the plant. The method comprises: temporarily setting, in accordance with the above-mentioned patterns, the plant operation parameters concerning the rates of change of state of the plant such as the rates of turbine acceleration and turbine load and rates of increase of the main steam temperature and pressure; estimating the change of the quantity of state of main steam at a designated future moment; estimating the thermal stresses in respective stress-evaluation portions of the boiler and turbine; comparing the estimated thermal stresses with respective allowable thermal stresses determined so as to correspond to the consumption of the life allowed for each start up and operation cycle of the plant; selecting one of the estimated thermal stresses which has smaller margin to the allowable thermal stress and obtaining the operation parameter which provided the maximum rate of change of the state of the plant; repeating these steps until the command state is attained; and controlling the boiler and the turbine in accordance with the thus obtained plant operation parameter.
摘要翻译： 一种控制热电发电厂的运行的方法，其中根据从给定的工厂启动和运行模式获得的设备运行参数来控制蒸汽发生设备和涡轮机的运行。 该方法包括：根据上述模式临时设定关于工厂状态变化率的设备运行参数，例如涡轮加速度和涡轮机负载率以及主蒸汽温度的增加率，以及 压力; 估计未来时刻主蒸汽状态的变化情况; 估计锅炉和涡轮机的各应力评估部分中的热应力; 将估计的热应力与相应的允许热应力进行比较，所述热应力被确定为对应于每个启动和运行周期允许的寿命的消耗; 选择具有较小余量的估计热应力与允许的热应力之一，并获得提供植物状态的最大变化率的操作参数; 重复这些步骤直到达到命令状态; 并根据由此得到的设备运行参数控制锅炉和涡轮机。
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公开(公告)号：US4461152A
公开(公告)日：1984-07-24
申请号：US367674
申请日：1982-04-12
申请人： Yasuhiro Tennichi , Naganobu Honda
发明人： Yasuhiro Tennichi , Naganobu Honda
摘要： In a steam turbine used with a power plant operated under variable pressure of the steam which is fed to the turbine through control valves, the control apparatus is arranged to control the control valves according to a signal obtained by adding an opening set signal with a compensation signal which is determined in dependence on a difference between a turbine stage steam pressure signal and a signal derived by multiplying the opening set signal with a ratio of the actual value of the control valve inlet steam pressure to a rated value thereof.
摘要翻译： 在与通过控制阀供给到涡轮的蒸汽的不同压力下运行的动力装置一起使用的蒸汽轮机中，控制装置被布置成根据通过将打开设定信号与补偿相加而获得的信号来控制控制阀 信号，其根据涡轮级蒸汽压力信号和通过将打开设定信号乘以控制阀入口蒸汽压力的实际值与其额定值的比率而导出的信号之间的差确定。
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