Standalone hybrid generation system for the remote area of Thar, Pakistan
2.7.3. AC-coupled Hybrid Power Systems
With
this type of configuration, the different HPSs are connected at the AC-bus with the load. The
AC coupled HPSs are further divided into two sub-topologies.
i. Centralized AC-coupled HPSs
ii.
Distributed AC-coupled HPSs
These two sub-topologies are explained below in detailed with schematic
block diagrams that help
help to give us the insight of the overall system.
2.7.4. Centralized AC-coupled Hybrid Power Systems.
An AC-coupled HPS is centralized when all the energy conversion
systems constituting it are
connected to a main AC-bus before being connected to the load. This configuration can be depicted
by the following figure, Figure 2.36.
Fig. 2.36: Centralized AC-coupled HPSs.
The wind turbine and diesel generator produce AC powers, thus they can be directly coupled onto the
main AC-bus or with AC/AC converters. The PV-array produces DC power and an inverter must be
used before it is coupled onto the main AC-bus. The charging or discharging of the battery bank with
a DC current seeks for a bidirectional inverter must be used (Figure 3-1).
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