Small Decentralized Hydropower Program National ... - Cd3wd.com

100 kW
Las unidades generadoras y aistemas de
distribucih de 50 kW o m&s, son por lo general
sistemas trifhicos. Cuando el centro de carga esti a
mayor distancia que 1 km de1 lugar de generazih, el
voltaje se podr5 aurnentar a un voltaje de
distribucih standard para yeducir las phrdidas de
energia en el conductor y la &da del voltaje en
Greas remotas. Las lheas monofhicas sirven directa-
mente a 10s transformedores secundarios y deben
todos acarrear aproximadamente carga igual para
que las tres fases se mantengan en equilibrio. La pro-
teccih de1 alimentador primordial se coordina con
las tapas de 10s fusibles de mode que las fallas de las
lheas de las tapas no vayan a interrumpir el servicio
en el resto de?, sistema.
f-
fuente alternativa
alternate source
===u
\ ‘\
alimentador primario
A simple nlsthod for integrating a small
hydropower unit with an existing electric system
is to isolate a portion of the load on the existing
system and serve it solely from the hydro station.
To do this, the station must have a synchronous
generator. A normally-open switch could be
closed to serve this isolated load from the ex-
isting source during periods when the hydro unit
is shut down. An interlock ensures that the
switch would not close while the generator is
operating. This arrangement is shown in Figure 3.
Many existing distribution lines are protected
by reclosers which respond to faults by briefly
de-enargizing the line, and then reclosing to
restore service in the likely event that the fault
was temporary. This operation may be repeated
R c- 100 kW; 443 kV; 30
Figura 3
Figure 3
tranformador de la estacih
station transformer
L--
10 hea monof5sica
transformador de distribucih
distribution transfoimer