Title :
Small-scale hydropower
Author :
Kato, Shinji ; Hoshi, Nobukazu ; Oguchi, Kuniomi
Author_Institution :
Ibaraki Univ., Japan
Abstract :
A novel harmonics-reducing system of cascaded-induction generators has been proposed, and its effectiveness has been confirmed by the simulation results. Comparing the characteristics of the cascaded generators with those of the single generator, we see that the power efficiency decreases by 1-3%, and the input power factor decreases by around 20%, but the power factor can be improved by controlling the reactive power of the power-recovery inverter. Since the proposed system has the advantages of a low-cost system, a brushless structure, and adjustable-speed characteristics, we anticipate that its use will be practical for small hydroelectric power plants.
Keywords :
asynchronous generators; harmonics suppression; hydroelectric generators; hydroelectric power stations; invertors; power factor correction; reactive power control; variable speed gear; adjustable-speed characteristics; brushless structure; cascaded-induction generators; harmonics-reducing system; input power factor; power efficiency; power-recovery inverter; reactive power control; small hydroelectric power plants; small-scale hydropower; Choppers; Hydroelectric power generation; Induction generators; Load flow; Power generation; Pulse width modulation; Pulse width modulation inverters; Rectifiers; Stator windings; Voltage control;
Journal_Title :
Industry Applications Magazine, IEEE
DOI :
10.1109/MIA.2003.1206914
