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Optimal Design and Real Time Implementation of Autonomous Microgrid Including Active Load

1
Research Institute, Center of Engineering, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia
2
Electrical Engineering Department, Faculty of Engineering, Mansoura University, Mansoura 35516, Egypt
3
Electrical Engineering Department, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia
*
Author to whom correspondence should be addressed.
Energies 2018, 11(5), 1109; https://doi.org/10.3390/en11051109
Received: 25 March 2018 / Revised: 17 April 2018 / Accepted: 19 April 2018 / Published: 1 May 2018
(This article belongs to the Special Issue Electric Power Systems Research 2018)
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Abstract

Controller gains and power-sharing parameters are the main parameters affect the dynamic performance of the microgrid. Considering an active load to the autonomous microgrid, the stability problem will be more involved. In this paper, the active load effect on microgrid dynamic stability is explored. An autonomous microgrid including three inverter-based distributed generations (DGs) with an active load is modeled and the associated controllers are designed. Controller gains of the inverters and active load as well as Phase Locked Loop (PLL) parameters are optimally tuned to guarantee overall system stability. A weighted objective function is proposed to minimize the error in both measured active power and DC voltage based on time-domain simulations. Different AC and DC disturbances are applied to verify and assess the effectiveness of the proposed control strategy. The results demonstrate the potential of the proposed controller to enhance the microgrid stability and to provide efficient damping characteristics. Additionally, the proposed controller is compared with the literature to demonstrate its superiority. Finally, the microgrid considered has been established and implemented on real time digital simulator (RTDS). The experimental results validate the simulation results and approve the effectiveness of the proposed controllers to enrich the stability of the considered microgrid. View Full-Text
Keywords: active loads; control; distributed generation; dynamic stability; microgrid; PLL and optimization active loads; control; distributed generation; dynamic stability; microgrid; PLL and optimization
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Hassan, M.A.; Worku, M.Y.; Abido, M.A. Optimal Design and Real Time Implementation of Autonomous Microgrid Including Active Load. Energies 2018, 11, 1109.

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