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4 条记录 (耗时 0.006 秒)

    Control system for variable speed water-wheel generator apparatus
    2.
    发明公开
    Control system for variable speed water-wheel generator apparatus 失效
    变速水轮发电机装置控制系统

    公开(公告)号：EP0245777A3

    公开(公告)日：1988-06-15

    申请号：EP87106616

    申请日：1987-05-07

    申请人： HITACHI, LTD.

    发明人： Kuwabara, Takao ,  Bando, Akira Narusawa Apartment 55 ,  Haraguchi, Eiji ,  Nakagawa, Hiroto

    IPC分类号： H02P09/42 ,  H02P09/04

    CPC分类号： H02P9/42 ,  H02P2101/10 ,  Y02E10/226

    摘要： A control system is used for a variable speed water-wheel generator apparatus. The generator apparatus includes a generator (1) having a primary winding (1a) connected to an electric power system (4) and a secondary winding (1b) connected to the electric power system (4) through a frequency converter (3), and a water wheel (2) directly coupled to a shaft of the generator and having variable opening vanes. In the control system, a first function generator (5) is responsive to at least an output command signal (Po) for the generator apparatus to determine a rotation number command signal (Na). A speed adjuster (10, 11) produces an output signal in accordance with a signal indicative of a difference between the output signal of the first function generator and an actual rotation number. An adder (13) adds the output command signal for the generator apparatus to the output signal of the speed adjuster to determine an overall output command signal (Po'). An output adjuster (15, 17) produces an output signal in accordance with a signal indicative of a difference between the output signal of the adder and actual power of the generator whereby firing angles of the frequency converter are controlled by the output signal of the output adjuster. A second function generator (5) is responsive to the output command signal (Po) for the generator apparatus to determine an opening command signal (Ya) for the variable opening vanes of the water wheel. An opening adjuster (8) produces an output signal in accordance with a signal indicative of a difference between the output signal of the second function generator and an actual opening of the variable opening vanes of the water wheel whereby the variable opening vanes of the water wheel are controlled by the output signal of the opening adjuster. The first and second function generators increase command values for the rotation number and the variable opening vanes, respectively, as the output command signal increases. The frequency converter is controlled such that the rotation number tending to go beyond a predetermined operation range is confined within the predetermined operation range.

    Control system for variable speed hydraulic turbine generator apparatus
    3.
    发明公开
    Control system for variable speed hydraulic turbine generator apparatus 失效
    变速液压涡轮发电机装置控制系统

    公开(公告)号：EP0220492A3

    公开(公告)日：1988-06-22

    申请号：EP86113077

    申请日：1986-09-23

    申请人： HITACHI, LTD. ,  THE KANSAI ELECTRIC POWER CO., INC.

    发明人： Haraguchi, Eiji ,  Nakagawa, Hiroto ,  Bando, Akira ,  Kuwahara, Takao ,  Nohara, Haruo ,  Ono, Kenichi

    IPC分类号： H02P09/42 ,  H02P09/04

    CPC分类号： H02P9/007 ,  H02P9/42

    摘要： A control system for variable speed hydraulic turbine generator apparatus comprises an induction gene­rator (l) connected at its primary side (la) to an AC power line system (4), a secondary excitation controller (3) connected to the secondary side (lb) of the induction generator (l) and being responsive to a generator output command signal (Po) supplied externally to supply to the induction generator (l) an excitation current which causes the induction generator (l) to generate AC power at the same frequency as that on the AC power line system (4), a hydraulic turbine (2) for rotating the induction generator (l), a guide valve (ll) for regulating the amount of water supplied to the hydraulic turbine (2), a rotation speed detector (6) for detecting a rotation speed of the induc­tion generator (l), a rotation speed command calculator (l5) for receiving a hydraulic turbine running condition signal (Po, H) inclusive of the external generator output command signal (Po) and calculating an optimum rotation speed command (Na), a rotation speed controller (l6) for comparing the optimum rotation speed command (Na) with a rotation speed signal (N) from the rotation speed detector (6) and producing a guide valve opening control signal (Ya) in accordance with a difference (ΔN) between the optimum rotation speed command (Na) and the rotation speed signal (N), and a guide valve driver (l0) responsive to the guide valve opening control signal (Ya) to deliver to the guide valve (ll) a signal which controls the opening of the guide valve (ll) in accordance with the guide valve opening control signal (Ya).