发明名称 |
Method of controlling a pump turbine |
摘要 |
An object of the present invention is to provide a pump turbine capable of improving the stability of the governor by fully lessening the influences by the S-characteristics even when the running point of the pump turbine is in the S-characteristics region. For this purpose, in a pump turbine comprising a runner which is coupled with a generator motor, discharge control apparatus for controlling the quantity of water passing through the runner, and a governor for controlling said discharge control apparatus to keep the runner speed at a predetermined speed, the arithmetic apparatus of said governor is controlled to temporarily open said closing discharge control apparatus in the leading half of the speed decrease or earlier after the first speed increase upon a load rejection turns to a speed decrease upon a load rejection which abruptly shuts off power from the generator motor, so that the rotational speed of the runner goes down at much slower rate than the rate of increasing immediately after a load rejection.
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申请公布号 |
US6336322(B1) |
申请公布日期 |
2002.01.08 |
申请号 |
US20000707843 |
申请日期 |
2000.11.08 |
申请人 |
HITACHI, LTD.;THE KANSAI ELECTRIC POWER CO., INC. |
发明人 |
KUWABARA TAKAO;KATAYAMA KEI;NAKAGAWA HIROTO;HAGIWARA HARUKI |
分类号 |
F16D33/08;(IPC1-7):F16D31/00;F01B25/00 |
主分类号 |
F16D33/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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