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Electrical Design of Small Hydro Plants

by Tushar Ghosh, Sverdrup & Parcel &, Associates Inc, San Francisco, CA, USA,



Document Type: Proceeding Paper

Part of: Waterpower '85

Abstract:

Major aspects of electrical design criteria for small hydro power plants used in co-generation schemes are: turbine control, generator and excitation equipment selection, protection relaying, remote control, synchronous bypass requirements and short circuit ratings of switchgear and cables. Where isolated operation of generator is not anticipated, the conventional speed governor can be replaced by a gate positioner actuator system; and induction generators may be an economic alternative to synchronous generators, provided starting voltage drop is tolerable. Solid state relays should be used; but utility's relaying requirements must be met for a co-generation project. Instead of conventional relays and timers, standard Programmable Controllers can be used to control both Start/Stop logic sequences and unit loading. In plants having bypass valves, synchronous bypass feature can be controlled electrically.

Subject Headings: Power plants | Hydro power | Electric power | Electrical systems | Cables | Electrical equipment | Turbines

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