YorkSpace

YorkSpace is York University's Institutional Repository. It supports York University's Senate Policy on Open Access by providing York community members with a place to preserve their research online in an institutional context.

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Recent Submissions

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    Optimized Volt/VAR Control for Inverter-Interfaced Distributed Energy Resources in Compliance with IEEE 1547 Standards
    (Institute of Central Computation and Knowledge, 2025-06-05) Shaterabadi, Mohammad
    The increasing integration of distributed energy resources (DERs), such as photovoltaic(PV) systems and battery storage, into distribution networks necessitates advanced inverter controls to maintain stable grid operations. IEEE Standard 1547 permits smart inverter functionalities, including Volt/VAR control, enabling DERs to autonomously manage voltage fluctuations caused by varying load and generation conditions. However, configuring these Volt/VAR settings optimally is challenging, as default parameters provided by standards may not ensure optimal performance or dynamic stability. This paper proposes a customized, per-node Volt/VAR control optimization framework for single-phase distribution feeders, adapting inverter control parameters based on expected short-term load and solar generation patterns. Leveraging a projected gradient descent optimization approach, proposed methodology guarantees dynamic stability by approximating feasible operational parameters within a convex polytope and ensuring full compliance with IEEE 1547 voltage and reactive power specifications. Comprehensive numerical evaluations conducted on the IEEE 141-bus distribution system using realistic operational data demonstrate the effectiveness and practicality of the proposed method, highlighting improved voltage stability and regulation compared to conventional approaches.
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    Stochastic Optimal Energy Planning of the Multi-connected Grids by the Presence of Bi-facial PV Panels: Interaction of Micro-nano and Main Grid
    (Institute of Central Computation and Knowledge, 2025-12-10) Shaterabadi, Mohammad
    The increasing greenhouse gas (GHG) emissions from fossil fuel-based energy systems have accelerated the global push toward cleaner technologies. Bi-facial photovoltaic (BPV) panels, capable of capturing solar irradiance from both sides, have emerged as a promising solution due to their higher energy yield and comparable costs to traditional PV systems. This paper explores the integration of BPV panels into a multi-connected grid comprising nano-, micro-, and main grid layers. A stochastic optimization framework is developed to address the uncertainties of solar irradiance. The problem is formulated as a Mixed-Integer Linear Programming (MILP) model and solved using the Augmented Epsilon Constraint (AEC) method in the General Algebraic Modeling System (GAMS) environment. Results demonstrate that incorporating BPV panels reduces microgrid operational costs by approximately 20%, boosts nano-grid profits by about 81%, and cuts emissions by about 10%, highlighting their potential to enhance system efficiency, flexibility, and sustainability.
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    Social Media as a Tool for Future-Making: The Cases of Two Entrepreneurs in Kakuma Refugee Camp
    (Berghahn Journals, 2026-03-01) Böhme, Claudia
    In this article I will look at the relationship between offline suffering and online happiness through the example of two young entrepreneurs living in Kakuma refugee camp in Kenya who strongly leverage social media for their business. From a basic communication device, the smartphone has become the door to a world of seemingly glamorous self-representation and a tool for future-making. I trace the young professionals’ motivations and inspirations for their work, and how they make a ‘brand’ in efforts to find a way of being self-reliant. In showcasing what they want and aim to be, these entrepreneurs actively engage in creating a self-image that is ‘beyond suffering’, one that can widen the gap and exemplify the ambiguous relationship between their real-world uncertainties and online images of success.
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    Código de ética : Reflexiones críticas sobre la ética en investigación en situaciones de migración forzada
    (International Association for the Study of Forced Migration (IASFM), 2018-11-05) Clark-Kazak, Christina
    La Asociación Internacional para el Estudio de la Migración Forzada propone un Código de Ética dedicado a la investigación con personas en situaciones de migración forzada. Al igual que las metodologías de investigación indígena incorporan una noción de ética amplia, comprometida y crítica en la cual se reconoce las diferenciaciones de poder y la voluntad de los participantes dado las historias de explotación en contexto de investigación, este documento establece cinco principios que son puntos de partida para una investigación respetuosa. La intención es reflejar la amplia diversidad de nuestros miembros, a la vez quienes están involucrados en la recopilación de información (ya sea en un entorno académico o comunitario) y aquellos a quienes se les solicita participar en la investigación. Dicho esto, reconocemos que este no es un documento completo ni exhaustivo, sino más bien un punto de partida para involucrarse de forma activa y crítica con cuestiones éticas.