Performance Consideration for Selecting a Static Excitation System

by Richard C. Schaefer, Basler Electric, Highland, IL, USA,
W. J. Frierdich, Basler Electric, Highland, IL, USA,

Document Type: Proceeding Paper

Part of: Waterpower '85


Many hydropower plants today are being upgraded with new static exciter/regulator systems to replace the old existing rotary exciters. One type of system is the semi-inverting system where only a positive rectified voltage is applied to the generator field. And the second type is a static exciter/regulator system having the ability to provide both a positive or negative dc voltage to the field. This can decrease the generator voltage recovery time during a full load rejection accompanied by a hydroturbine overspeed condition. Contrary to popular opinion, negative field forcing has little effect on the initial voltage overshoot.

Subject Headings: Statics (mechanics) | Excitation (physics) | Electrical systems | Electric power | Power plants | Electrical equipment | Existing buildings | Load factors

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