发明名称 SPEED GOVERNING CONTROLLER FOR TANDEM STEAM TURBINE
摘要 PURPOSE:To improve the reliability of a control system by providing a tandem steam turbine with plural speed detectors and using signals from the speed detector for recording and indicating speed when an exclusive detector for controlling speed and load gets out of order. CONSTITUTION:A control system for a tandem steam turbine is provided with plural speed detector DP1-3 and ones for recording and indicating speed DP4, 5. Signals sent from the above detectors are inputted into a majority logic circuit ML, and the most reliable of signals sent from exclusive speed detectors for controlling speed and load is selected to be used. When one or more of the above signals are judged to be abnormal, the signals sent from the speed detectors for recording and indicating speed DP4, 5 are added to the above signals, and then the most reliable of these signals is selected. Consequently, the reliability of the control system can be improved.
申请公布号 JPS6165002(A) 申请公布日期 1986.04.03
申请号 JP19840186378 申请日期 1984.09.07
申请人 HITACHI LTD 发明人 AZUMA TOSHIHIKO
分类号 F01D17/20;F01D13/00;F01D21/14 主分类号 F01D17/20
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