|
Keywords
|
Electric vehicle aggregator, Fractional-order PID, Load frequency control, Sine cosine algorithm, Timevarying
delay
|
|
Abstract
|
The EVs battery has the ability to enhance the balance between the load demand and power generation units.
The EV aggregators to manage the random behaviour of EV owners and increasing EVs participation in the ancillary
services market are employed. The presence of aggregators could lead to time-varying delay in load frequency control
(LFC) schemes. The effects of these delays must be considered in the LFC controller design. Due to the dependency of
controller effectiveness on its parameters, these parameters should be designed in such a way that the LFC system has
desired performance in the presence of time-varying delay. Therefore, a Sine Cosine Algorithm (SCA) is utilized to
adjust the fractional-order PID (FOPID) controller coefficients. Also, some evaluations are performed about the
proposed LFC performance by integral absolute error (IAE) indicator. Simulations are carried out in both single and
two area LFC system containing EV aggregators with time-varying delay. According to results, the proposed controller
has fewer frequency variations in contrast to other controllers presented in the case studies. The obtained output could
be considered as a solution to evaluate the proposed controller performance for damping the frequency oscillations in
the delayed LFC system.
|