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Method of controlling a pump turbine

  • US 6,336,322 B1
  • Filed: 11/08/2000
  • Issued: 01/08/2002
  • Est. Priority Date: 11/09/1999
  • Status: Expired due to Term
First Claim
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1. A method of controlling a pump turbine, comprising steps of controlling the quantity of water passing through a runner connected to a generator motor, changing the rotational direction of said runner so that said runner can work in a Pump-up mode or in the Power Generation mode, and controlling the quantity of water so that, when a load of said generator motor is rejected in the Power Generation mode, the rotational speed of the runner may turn to increase at a speed which is higher than the rated rotational speed or the initial speed at least one third of the difference between the first peak and the rated rotational speed or the initial speed after the first speed increase upon a load rejection turns to a speed decrease.

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