Performance analysis of WOA optimised PID controllers for LFC of interconnected thermal power systems
by Rajesh Bhatt; Girish Parmar; Rajeev Gupta
International Journal of Computational Systems Engineering (IJCSYSE), Vol. 5, No. 3, 2019

Abstract: Nature inspired whale optimisation algorithm (WOA) has been implemented for load frequency control (LFC) of two-area interconnected non-reheat thermal power systems in order to maintain the system frequency at a prescheduled value in the presence of disturbances. Two similar PID controllers have been used in each area and control optimisation problem for proper tuning of controllers' parameters is defined by considering the integral of time multiplied absolute error (ITAE) as an objective function. The superiority of WOA optimised PID controllers has been established by comparing the results with other existing approaches such as; BFOA/PI, DE/PI, NSGA-II/PI, GSA/PI and GWO/PI for the same system in the presence of load changes of different magnitude and location. For performance analysis, the percentage reduction in ITAE, settling times of frequency & tie line power deviations and minimum damping ratio (MDR), etc. have also been calculated. The simulation results show that the WOA/PID approach gives far better results in terms of system dynamic responses, ITAE, MDR, settling times and overshoots of Δf₁, Δf₂ and ΔP_Tie for the same system under study when compared with some existing approaches.

Online publication date: Wed, 17-Jul-2019

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

 
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Computational Systems Engineering (IJCSYSE):
Login with your Inderscience username and password:

Username:        Password:          Forgotten your password?

Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email subs@inderscience.com