A New Adaptive Load-Shedding and Restoration Strategy for Autonomous Operation of Microgrids: A Real-Time Study
عنوان مقاله: A New Adaptive Load-Shedding and Restoration Strategy for Autonomous Operation of Microgrids: A Real-Time Study
شناسه ملی مقاله: JR_IJE-33-1_010
منتشر شده در شماره 1 دوره 33 فصل در سال 1399
شناسه ملی مقاله: JR_IJE-33-1_010
منتشر شده در شماره 1 دوره 33 فصل در سال 1399
مشخصات نویسندگان مقاله:
Mehdi Farzinfar - School of Engineering, Damghan University, Damghan, Iran
Nirmal-Kumar C Nair - Power Systems Group of Department of Electrical and Computer Engineering at University of Auckland, Auckland, New Zealand
Momen Bahadornejad - Unitec Institute of Technology, Auckland, New Zealand
خلاصه مقاله:
Mehdi Farzinfar - School of Engineering, Damghan University, Damghan, Iran
Nirmal-Kumar C Nair - Power Systems Group of Department of Electrical and Computer Engineering at University of Auckland, Auckland, New Zealand
Momen Bahadornejad - Unitec Institute of Technology, Auckland, New Zealand
Islanding operation is one of the main features of a MicroGrid (MG), which is realized regarding the presence of distributed energy resources (DERs). However, in order to deal with the control challenges, which an MG faces during island operation, particularly when the transition is associated with certain excessive load, an efficient control strategy is required. This paper introduces a Central Management Agent (CMA) which maintains the stability of the MG, once it is islanded, by controlling an Energy Storage System (ESS) and a Central Synchronous Generator (CSG). Further, this paper proposes a new adaptive load-shedding/restoration schemes that calculates the amount of power imbalance based on frequency measurements combined with the mean value of the frequency gradient. The primacy of the proposed scheme over existing schemes, like instantaneous frequency gradient-based load shedding scheme, is its robustness against frequency oscillations. Moreover, the proposed method acts compatible with the control routine of DERs and the intermittent nature of the PV plant. As another salient feature of this paper, a Hardware In the Loop (HIL) testbed for real-time simulation is developed under which the proposed scheme and related communication with CMA along with other components are evaluated. The obtained results show that the control strategy can confidently conserve the stability of the MG in islanded mode and meet smooth reconnection to the grid-connected mode.
کلمات کلیدی: microgrid, Load Shedding, Frequency Gradient, Energy storage system, Real-Time Simulation
صفحه اختصاصی مقاله و دریافت فایل کامل: https://civilica.com/doc/1021652/