Abstract
Energy transition from traditional generation sources into new renewable energy generation has become essential for facing climate changes. However, increased penetration levels of renewable energy sources (RESs) make power systems subjected to low inertia problems. Moreover, the continuously growing numbers of electric vehicles (EVs) have made the substantial need for their contribution in power systems. Therefore, this paper proposes a combined fractional-order controller using the parallel combination of tilt-integral-derivative with filter (TIDF) and hybrid fractional-order (HybFO) controllers for robust frequency regulation in interconnected power systems. The proposed controller is advantageous in combining the merits of two fractional-order controllers that result in more robust and effective load frequency control (LFC) at wide range and different types of disturbances. Furthermore, a new application of marine predator optimization algorithm (MPA) is proposed for simultaneously determining the optimum controller parameters in the different power system areas. The existing EVs contribute in performing additional functionality in power systems. EVs help in damping out the frequency and tie-line power oscillations in the proposed work. The two-area interconnected power system is selected as a case study with the installed photovoltaic (PV), and wind generations in addition to distributed EVs among areas. The obtained results show the superiority and suitability of the proposed controller over the traditional controllers in the literature. Additionally, the effectiveness of the MPA is validated and compared with recent meta-heuristic optimization algorithms.
Highlights
The simulation results of the proposed controller are compared with the tiltintegral-derivative with filter (TIDF) and hybrid fractional-order (HybFO) controllers to investigate its superiority in terms of the percentage overshoot/undershoot in addition to settling times of frequency deviations following different cases of disturbances in the different scenarios
A two-degree of freedom (2-DOF) controller has been proposed by combining the merits of both controllers (HybrFO and TIDF)
The second feedback signal uses the frequency deviation, which is being responsible for mitigating the high-frequency signal
Summary
In large power systems consisting of many interconnected areas, there are many control parameters, which need to be optimally designed. FLC systems have been presented for controlling EVs in interconnected power system using ICA, genetic algorithm and tribe DE optimizer in [38], [39]. This paper proposes a combined FO controller using the parallel combination of TIDF and HybFO controllers for robust frequency regulations in interconnected power systems. A new robust fractional order controller is proposed based on the combination of TIDF and HybFO controllers for frequency stability improvement of power system. This paper proposes a new controller and optimized design algorithm for LFC in the studied two-area power system. The proposed controller manages the connected EVs in each area for preserving robust control of the system frequency and tie-line power. The mathematical modeling of the various elements is introduced
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