Method and system for effecting control governing of a steam turbine
    2.
    发明授权
    Method and system for effecting control governing of a steam turbine 失效
    实现蒸汽轮机控制控制的方法和系统

    公开(公告)号:US4187685A

    公开(公告)日:1980-02-12

    申请号:US876944

    申请日:1978-02-10

    IPC分类号: F01D17/24 F01K13/02

    CPC分类号: F01K13/02

    摘要: A method and system for effecting control governing of a steam turbine wherein the steam chamber of a first stage nozzle is divided into a plurality of steam compartments, control valves each connected to one of the steam compartments are individually operated for controlling the flow rate of steam introduced into the turbine, and the governing of the nozzle is effected by adjusting the flow rate of steam in accordance with a load. At low load, the degree of opening of the control valves is kept constant and the turbine is driven by steam of a reduced pressure by reducing the pressure of the steam at the inlet of the turbine so as to maintain, in a low load region, the volume flow rate of steam for a high load region. To cope with a change in the value of the load, the degree of opening corresponding to a predetermined change in the value of the load is set beforehand for each control valve. When the change in the value of the load is smaller than the predetermined change in the value of the load, the degree of opening of the control valve involved is adjusted. Conversely, when the change in the value of the load is greater than the predetermined change in the value of the load, the pressure of the steam at the inlet of the turbine is controlled.

    摘要翻译: 一种用于实现蒸汽轮机的控制控制的方法和系统,其中第一级喷嘴的蒸汽室被分成多个蒸汽隔间,各自连接到一个蒸汽隔间的控制阀被单独操作以控制蒸汽的流量 引入涡轮机,并且通过根据负载调节蒸汽的流量来实现喷嘴的调节。 在低负载下,控制阀的开度保持恒定,并且通过减小涡轮入口处的蒸汽的压力使涡轮由减压蒸汽驱动,以便在低负荷区域中保持, 高负荷区域的蒸汽体积流量。 为了应对负载值的变化,对于每个控制阀,预先设定对应于负载值的预定变化的开度。 当负载值的变化小于负载值的预定变化时,调节所涉及的控制阀的开度。 相反,当负载值的变化大于负载值的预定变化时,控制涡轮入口处的蒸汽的压力。