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1.发明授权Control system and method for a steam turbine having a steam bypass arrangement 失效具有蒸汽旁路装置的蒸汽轮机的控制系统和方法
公开(公告)号：US4471446A
公开(公告)日：1984-09-11
申请号：US397260
申请日：1982-07-12
摘要： A DEH (digital electrohydraulic) control system for a steam turbine generator having a steam bypass system. The turbine system includes a high pressure turbine having throttle and governor steam admission valves as well as an intermediate pressure turbine having stop and interceptor steam admission valves. The turbine is brought on line by initially controlling steam admission into the intermediate pressure turbine by modulating the interceptor valve in response to a speed error signal generated as a result of the difference between actual and a predetermined reference speed. During this initial control the throttle valve remains in a closed position. When the turbine speed has attained a preset value such as half of synchronous speed, the interceptor valve is held at the same position it was in when the preset speed was attained and the throttle valve is controllably open in response to the same speed error signal. After a preset transfer speed has been attained, control of steam admission to the high pressure turbine is transferred to the governor valve and after synchronous speed has been reached the DEH system switches to a load control mode wherein the signal which controls the positioning of the governor valve is also utilized to control the interceptor valve position. The interceptor valve thereafter will reach a wide open position at a predetermined load.During the speed control mode of operation the control signal which controls the positioning of the interceptor valve is modified by certain pressure conditions at the input of the interceptor valve after the preset speed is attained.
摘要翻译： 一种用于具有蒸汽旁通系统的蒸汽轮机发电机的DEH（数字电动液压）控制系统。 涡轮机系统包括具有节流阀和调速器蒸气入口阀的高压涡轮机以及具有停止和拦截器蒸汽进入阀的中间压力涡轮机。 通过根据由实际和预定参考速度之间的差异产生的速度误差信号调制拦截阀，通过初始地控制蒸汽进入中压涡轮机，使涡轮机上线。 在该初始控制期间，节流阀保持在关闭位置。 当涡轮机转速达到同步速度的一半的预设值时，拦截阀保持在达到预设速度的同一位置，并且节流阀响应于相同的速度误差信号而可控地打开。 在达到预设的传送速度之后，控制进入高压涡轮机的蒸汽进入调速阀，并且在达到同步速度之后，DEH系统切换到负载控制模式，其中控制调速器定位的信号 阀门也用于控制拦截阀的位置。 此后的拦截器阀将以预定的负载达到大的打开位置。 在速度控制运行模式下，控制拦截阀定位的控制信号在达到预设速度后，通过拦截阀输入端的某些压力条件进行修改。
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公开(公告)号：US4455836A
公开(公告)日：1984-06-26
申请号：US305814
申请日：1981-09-25
CPC分类号： F01K7/24 , F01D17/105 , F01K7/165
摘要： A bypass system for a steam turbine wherein the temperature of the steam bypassed around the high pressure turbine is accurately controlled by measuring the inlet and outlet temperatures of the boiler reheater and generating an adaptive set point. The set point value is used to govern operation of a spray valve which admits cooling water to the bypass steam path.
摘要翻译： 一种用于蒸汽涡轮机的旁路系统，其中通过测量锅炉再热器的入口和出口温度并产生自适应设定点来精确地控制绕高压涡轮机旁路的蒸汽的温度。 设定值用于控制允许冷却水到旁路蒸汽路径的喷雾阀的操作。
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公开(公告)号：US4471620A
公开(公告)日：1984-09-18
申请号：US321160
申请日：1981-11-13
摘要： A bypass system for a steam turbine wherein the energy level of the steam bypassed around the intermediate pressure and low pressure turbines is modified by introduction of cooling water. The amount of water introduced is adaptively varied as a function of the enthalpy of the bypassed steam as measured by a sensor in the steam path.
摘要翻译： 一种用于蒸汽轮机的旁路系统，其中通过引入冷却水来改变围绕中压和低压涡轮机旁路的蒸汽的能级。 随着蒸汽路径中的传感器测量，引入的水量随着旁路蒸汽的焓的变化而自适应地变化。
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公开(公告)号：US4448026A
公开(公告)日：1984-05-15
申请号：US305813
申请日：1981-09-25
CPC分类号： F01K7/24 , F01D17/105 , F01K7/16
摘要： A steam turbine system which includes a steam generator and a steam bypass path for bypassing steam around the turbine. The outlet throttle pressure of the steam generator is controlled by controlling admission of steam into the bypass path by means of a bypass valve. A desired throttle pressure set point is generated which is independent of steam flow and this set point is compared with the actual throttle pressure for governing the bypass valve during turbine start-up. When the turbine is fully operational the bypass valve control is effected by a comparison of the actual throttle pressure with the desired throttle pressure set point plus some bias.
摘要翻译： 一种蒸汽轮机系统，其包括蒸汽发生器和用于绕过涡轮机绕过蒸汽的蒸汽旁路路径。 通过控制通过旁通阀将蒸汽引入旁通路径来控制蒸汽发生器的出口节流压力。 产生与蒸汽流无关的所需的节流压力设定点，并将该设定点与在涡轮启动期间控制旁通阀的实际节气门压力进行比较。 当涡轮机完全可操作时，通过将实际节气门压力与期望的节气门压力设定值加上一些偏差进行比较来实现旁通阀控制。
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5.发明授权System and method for transferring the operation of a turbine-power plant between single and sequential modes of turbine valve operation 失效在涡轮机运行的单模式和顺序模式之间转移涡轮发电机组的运行的系统和方法
公开(公告)号：US4270055A
公开(公告)日：1981-05-26
申请号：US866155
申请日：1977-12-30
CPC分类号： F01D17/20
摘要： A system and method of operating a turbine power plant utilizing a digital computer to transfer automatically between a single valve mode and sequential valve mode of operation and vice versa without disturbing the load or steam flow demand to the turbine, is disclosed. Selecting the other mode of valve operation when operating automatically in one valve mode results in the generation of physical representations corresponding to the desired flow through each of the valve means in such other mode at the operating load or flow level. The flow in the one mode and the desired flow in the other mode is used to generate a representation based on flow change for each valve means. A number of increments of valve flow change for each valve means is determined in accordance with the largest valve flow change and a predetermined limit. The size of each incremental change is determined in accordance with the respective valve flow change. The position of the appropriate valves are changed simultaneously at periodic time intervals to change the flow at each interval corresponding to its respective incremental flow change until the turbine is operated in the selected mode.A change in total steam flow demand of the turbine during such transfer suspends the transfer and changes the steam flow of the valves equally in accordance with such change. If the position of the valves does not permit an equal allocation of the total change, such change is allocated to the extent of such valves capability and the remaining change is allocated equally among the remaining valves. The transfer is resumed subsequent to effecting the total flow change.
摘要翻译： 公开了一种使用数字计算机在单个阀模式和顺序阀操作模式之间自动传送并且反之亦然而不影响对涡轮机的负载或蒸汽流量需求的涡轮发电厂的系统和方法。 在一个阀模式下自动运行时选择其他阀门操作模式导致在操作负载或流量水平下以这种其他模式产生对应于通过每个阀装置的期望流量的物理表示。 使用一种模式中的流量和另一模式中的期望流量来产生基于每个阀装置的流量变化的表示。 根据最大的阀流量变化和预定的限制来确定每个阀装置的阀流量变化的增量的数量。 每个增量变化的大小根据相应的阀流量变化来确定。 适当的阀的位置以周期性的时间间隔同时改变，以改变与其相应的增量流量变化相对应的每个间隔处的流量，直到涡轮机以选定的模式操作。 在这种传送期间，涡轮机的总蒸汽流量需求的变化暂停了转移，并根据这种变化平均地改变了阀的蒸汽流量。 如果阀的位置不允许总变化的相等分配，则这种变化被分配到这种阀的能力的程度，并且剩余的变化在剩余的阀中被平均分配。 在实现总流量变化之后恢复传输。
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6.发明授权System for operating a boiling water reactor steam turbine power plant utilizing dual analog throttle pressure controllers 失效利用双模拟节流压力控制器操作沸水反应堆蒸汽轮机发电厂的系统
公开(公告)号：US3931503A
公开(公告)日：1976-01-06
申请号：US415868
申请日：1973-11-13
CPC分类号： G21D3/04 , F01D17/24 , G21D3/08 , F05D2200/11 , Y02E30/40
摘要： A combined digital computer/analog control system for operating a boiling water reactor-steam turbine-power plant wherein one of two analog throttle pressure controllers is used for controlling the inlet and bypass valves. One of the pressure controllers is biased to provide a higher signal than the other; and such nonbiased controller is the one selected to control the valves. Each controller includes a pressure transducer, a summing device and amplifier, and a lead/lag circuit together with the appropriate power supply.A failure detection system is used to switch the controllers from automatic to manual when a predetermined combination of controller components becomes defective. Also, such system is so organized that a transducer failure for one controller causes the other controller to assume control regardless of whether such failure results in a higher or lower than proper signal.
摘要翻译： 用于操作沸水反应堆 - 蒸汽轮机 - 发电厂的组合数字计算机/模拟控制系统，其中两个模拟节气门压力控制器之一用于控制入口和旁通阀。 一个压力控制器被偏置以提供比另一个更高的信号; 并且这种非偏置控制器是用于控制阀门的控制器。 每个控制器包括压力传感器，求和装置和放大器以及与适当电源一起的引导/滞后电路。
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7.发明授权System for operating a boiling water reactor steam turbine plant with a combined digital computer and analog control 失效用于操作具有组合数字计算机和模拟控制的沸水反应堆蒸汽轮机设备的系统
公开(公告)号：US3931500A
公开(公告)日：1976-01-06
申请号：US415869
申请日：1973-11-13
摘要： A combined digital computer/analog control system for operating a boiling water reactor steam turbine power plant, wherein the digital computer provides a throttle pressure setpoint, speed error and load demand for controlling the plant depending upon the operational states of the system, is disclosed. The analog portion of the system also controls the plant in cooperation with the digital computer for certain operational states and conditions when the digital computer is in operation; and the analog system alone controls the plant when the digital computer is out of service. The transfer between such control is effected depending upon the operational states of the system and certain of the components therein. The system also includes in the digital computer portion, the provision for preventing a load demand which is outside the limits of the reactor circulation system when the reactor is in a state of automatic operation.
摘要翻译： 公开了一种用于操作沸水反应堆蒸汽轮机发电厂的组合数字计算机/模拟控制系统，其中数字计算机根据系统的操作状态提供节流压力设定点，速度误差和用于控制设备的负载需求。 当数字计算机运行时，系统的模拟部分还与数字计算机合作控制某些操作状态和状况; 当数字计算机停止工作时，模拟系统单独控制工厂。 这种控制之间的转移取决于系统的操作状态和其中的某些组件。 该系统还包括在数字计算机部分中，当反应器处于自动操作状态时，防止负载需求超出反应堆循环系统极限的规定。
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8.发明授权
公开(公告)号：US4088875A
公开(公告)日：1978-05-09
申请号：US628629
申请日：1975-11-04
CPC分类号： F01D17/18
摘要： A system for indicating optimum positioning of steam inlet valves to minimize steam throttling losses during operation of a turbine power plant in the sequential valve mode is disclosed.
摘要翻译： 公开了一种用于指示蒸汽入口阀的最佳定位的系统，以使在顺序阀模式下的涡轮发电厂的运行期间的蒸汽节流损失最小化。
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公开(公告)号：US4053745A
公开(公告)日：1977-10-11
申请号：US631299
申请日：1975-11-12
摘要： A system for detecting the failure of steam inlet valves to respond properly to their respective control signals, is disclosed. The detection of such a contingency provides an appropriate indication, and also initiates a transfer to single valve operation when operating in the sequential valve mode. The system provides for indicating and/or transferring to single valve operations only after the contingency has been detected for a predetermined interval to compensate for the velocity limiting characteristics of the valve actuators.
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10.发明授权System and method for controlling a turbine power plant in the single and sequential valve modes with valve dynamic function generation 失效用阀门动力学函数产生控制单一和顺序阀模式的涡轮发电厂的系统和方法
公开(公告)号：US4418285A
公开(公告)日：1983-11-29
申请号：US866150
申请日：1977-12-30
摘要： A system and method for operating a turbine power plant, wherein a demand signal based upon load or total turbine steam flow required for a predetermined level of operation controls the value of individual signals representative of valve position for respective steam inlet valves in the single and sequential mode of operation, is disclosed. Each individual valve position signal, which is representative of a selected portion of the total demand signal, is dynamically calculated to reflect the effect of the pressure drop across the nozzles, and to correct for the number of inlet nozzles, associated with each valve. The total demand signal is modified in accordance with actual throttle pressure over a period of time that is dependent on the amount of throttle pressure change.
摘要翻译： 一种用于操作涡轮发电厂的系统和方法，其中基于预定操作所需的负载或总涡轮机蒸汽流量的需求信号控制代表相应蒸汽入口阀的单个和顺序的阀位置的各个信号的值 披露了运营模式。 动态地计算代表总要求信号的选定部分的每个单独的阀位置信号，以反映喷嘴两端的压降的影响，并且校正与每个阀相关联的入口喷嘴的数量。 总需求信号根据节气门压力变化量的一段时间内的实际节气门压力进行修改。
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