THESIS
2018
xiii, 44, that is, xvi, 44 pages : illustrations ; 30 cm
Abstract
With the increasing load from the integration of electric vehicles (EVs) and the
increasing uncertain supply from renewable energy sources (RES), it becomes increasingly
challenging to maintain the reliability and stability of the power system,
especially for its most vulnerable part, namely, the distribution network. Therefore,
a larger amount of ancillary services are needed. Ancillary services are those
services to balance the demand and supply so as to maintain the reliable operations
of the power system. Leveraging the deferrable property and charging flexibilities
of EVs, we propose to coordinate the charging power of EVs in the demand side
to provide ancillary services. In doing so, the distribution system operator (DSO)
can not only reduce energy costs and avoid overloa...[
Read more ]
With the increasing load from the integration of electric vehicles (EVs) and the
increasing uncertain supply from renewable energy sources (RES), it becomes increasingly
challenging to maintain the reliability and stability of the power system,
especially for its most vulnerable part, namely, the distribution network. Therefore,
a larger amount of ancillary services are needed. Ancillary services are those
services to balance the demand and supply so as to maintain the reliable operations
of the power system. Leveraging the deferrable property and charging flexibilities
of EVs, we propose to coordinate the charging power of EVs in the demand side
to provide ancillary services. In doing so, the distribution system operator (DSO)
can not only reduce energy costs and avoid overload of gird components, but also
gain profits for providing ancillary services.
In this thesis, we aim to minimize the net cost of the DSO by coordinating the
charging of EVs to provide multiple ancillary services simultaneously in an optimal
way. Specifically, in the first part of the thesis, we design a two-step strategy to
provide frequency regulation and valley filling services jointly by coordinating the
active charging power of EVs in distribution networks. Simulation results prove
the feasibility and performance of the proposed strategy. In addition to controlling
the active charging power of EVs, we can also utilize EVs to provide reactive power
for voltage regulation, thanks to the recent advance of the EV charger technology.
Thus in the second part of the thesis, we propose a joint voltage and frequency
regulation strategy by coordinating both the active and reactive powers of EVs in
distribution networks. The effectiveness and performance of the proposed strategy
are demonstrated by numerical simulations as well.
Post a Comment