Abstract
In this article, a sliding mode control (SMC) is proposed to deal with the frequency deviation problem in interconnected time-delay power systems (ITDPS) with two source power generations. First, the proportional and integral switching surface is used for each area to guarantee the frequency deviation reach zero in normal operating conditions. Then, the stability of the system is ensured with a new Linear Matrix Inequality (LMI) via Lyapunov stability theory. In addition, the SMC law is designed to guarantee the finite time eachability of the system. Finally, impacts of certain physical constraints affecting dynamic performance of the power network such as time-delay is proposed to consider the signal delay in the controller. Effectiveness of the suggested method is validated by simulation studies on the load frequency control under time-delays in the two-area, the step load disturbance and the mismatched uncertainty.This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium provided the original work is properly cited.
Highlights
Load frequency control (LFC) is one of the vital and challenging problems in a power network
We present a sliding mode control for interconnected time-delay power systems (ITDPS) with two source power generations to solve the LFC problem
The suggested controller is implemented by the sliding mode control (SMC) method
Summary
Load frequency control (LFC) is one of the vital and challenging problems in a power network. To decrease the required control effort and guarantee the settling time, overshoot, an optimal PID control method was designed based on LMI for both single power system and MAPS [7]. The combination of intelligent control and optimization technique has been proposed to choose the optimal parameters for the PID controller to improve the system stability and performance in the LFC of the MAPS.
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