Page 248 - Decision Making Applications in Modern Power Systems

Effects of electrical infrastructures in grid with high penetration Chapter | 8 213

FIGURE 8.7 Distribution system power supply in a per phase representation.

Nevertheless, if the proposed smart coordinated operation is employed,
the analyzed distribution system becomes an actual microgrid environment
with local control capacity and ability of taking advantage of the opportu-
nities created by the available flexible resources. In this perspective the pre-
viously observed operative reality can be drastically improved in multiples
aspects, such as for deferring investment in the expansion of the transmission
infrastructure or increasing the local generation capacity.
The new operative reality can be assessed through the new demand pro-
file of the distribution system described in Fig. 8.8. The measures required to
perform these actions are observable by the microgrids’ supplying patterns
shown in Fig. 8.9.
First, the previously observed outage during dawn can be entirely elimi-
nated significantly improving the service quality and social welfare. This is
possible since the local generation, with the help of flexible resources, is
capable of supplying the microgrid demand and performs the necessary con-
trols to sustain the microgrid operation within acceptable limits.
This perspective is stressed in Fig. 8.10 presenting the frequency varia-
tion of the microgrid during the complete analyzed period. It is possible to
observe that during islanded operation, the system controls are assumed by