This paper is concerned with the design of an autonomous hybrid alternating current/direct current (AC/DC) microgrid for a community system, located on island without possibility grid connection. It comprised photovoltaic (PV) arrays and diesel generator, AC loads, battery energy storage devices ensuring uninterruptible power supply during prolonged periods low sunshine. A multi-objective, non-derivative optimisation considered in this residential application; primary objective system cost...

This paper focuses on developing an appropriate combinatorial optimization technique for solving the optimal sizing problem of hybrid ac-dc microgrids. A novel two-stage iterative approach is proposed. In first stage, a meta-heuristic based tailor-made genetic algorithm used to tackle problem, while, in second, non-linear solver deployed solve operational subject obtained design/investment decisions. The proposed approach, being able capture technical characteristics such as voltage and...

Extreme events can cause severe power system damage. Resilience-driven operation of networked microgrids (MGs) has been heavily studied in literature. There is, though, little research considering the influence resilience on decision making for planning. In this paper, a three-level model is suggested to solve optimal sizing problem MGs both and cost. first level, meta-heuristic technique based an adaptive genetic algorithm (AGA) utilized tackle normal problem, while time-coupled AC OPF...

In this paper, the impact of uncertainties in loads, renewable generation, market price signals, and event occurrence time on feasible islanding survivability microgrids is analyzed. A data-driven approach proposed for estimating maximum deviation level uncertain parameters dynamically based historical data. Similarly, fragility curves are utilized determining preparation potential events estimated physical constraints microgrid components. addition, a resilience-oriented demand response...

Power system decentralization has been an emerging topic for the past decade in effort to improve power quality and environment protection via increased integration of renewable energy sources. Toward these objectives, decentralized microgrids have proposed thoroughly investigated terms technical capabilities economic performance. In fact, planning actual operation small-scale, started countries, such as Canada, Japan, USA, U.K., other countries. It is expected that research this area will...

The electrical energy generated from renewable resources connected to transmission and distribution systems the displacement of synchronous generators continues grow. This presages a paradigm-shift away traditional provision ancillary services, essential ensure robust system, transmission-connected towards non-synchronous generation (including distribution-connected resources). Given that available at disposal system operators are continuously increasing, flexibility for operating network...

This study presents a method for discriminative detection of direct current (DC) faults on voltage source converter-powered multi-terminal high-voltage transmission systems using two fundamental guiding principles, namely instantaneous current-differential and travelling waves. The proposed algorithm utilises local measurements from all lines connected to DC busbar, measurement the side converter. scheme operates at sampling frequency 96 kHz, which conforms with IEC 61869-9. No long distance...

High-impact and low-probability extreme events can cause severe damage to power systems, especially for distribution systems. Microgrids (MGs) with distributed generation resources provide a viable solution local load survivability via islanding schemes during events. Recently, much research has focused on resilience-driven modeling operations of MGs. In this paper, operational model incorporating two modes (grid-connected islanded) detailed technical characteristics, such as voltage-related...

Microgrids are considered a viable solution for achieving net-zero targets and increasing renewable energy integration. However, there is lack of conceptual work focusing on practical data analytics deployment schemes case-specific insights. This paper presents scalable flexible physical digital architecture extracting data-driven insights from microgrids, with real-world microgrid utilized as test-bed. The proposed includes edge monitoring intelligence, data-processing mechanisms,...

This paper focuses on the transmission system options for connection of offshore wind farms and investigates advantages disadvantages proposed concepts in order to draw a conclusion regarding their suitability electricity system. Then, most appropriate solution is implemented Matlab/Simulink show its benefits. For this purpose, 5 are connected an station power output transferred onshore via point – DC link. Additionally novel proposal voltage control included model simulate behaviour when...

This paper proposes a DC voltage control strategy for fault management taking into advantage the operation of master controller located in offshore AC substation platform.The issue resolved via proposed relates to overvoltages caused HVDC links when power transfer onshore is disrupted due faults occurring at side grid.The presented this an effective way maintaining overvoltage within safety limits reducing connected wind farm output.The aforementioned requires small computational and no...

This paper demonstrates the effectiveness of distribution level (≤132 kV) resources to tackle voltage problem at 400 kV transmission system in south-east England. Such is a major concern for UK operator, National Grid, and set aggravate once Dungeness, only synchronous power plant region, decommissioned. Aggregate reactive capability grid interface converters distributed generation (DG) region shown mitigate both under- over-voltage problems. Tap-stagger operation 132/33 parallel...

The energy sector faces numerous challenges, including rising electricity costs and inconsistent services due to network overload, often requiring the involvement of a central operator address these issues. However, user-centric approach that prioritizes demand-side management, exemplified by decentralized Community Energy Systems (dCES), presents promising solution distribution supply challenges. dCES can be conceptualized as small-scale, dynamic seamlessly integrated into broader framework...

Power system decentralization has been an emerging topic for the past decade in effort to improve power quality and environment protection via increased integration of renewable energy sources. Towards these objectives, decentralized microgrids have proposed thoroughly investigated terms technical capabilities economic performance. In fact, planning actual operation small-scale, started countries such as Canada, Japan, USA, UK other countries. It is expected that research this area will...

This paper focuses on developing an appropriate optimization technique for solving the optimal operation problem of hybrid AC/DC microgrids. A non-linear mathematical formulation is deployed to solve subject exhaustive set constraints and equations pertaining AC DC networks. The proposed approach, being able capture technical characteristics, such as voltage frequency, through detailed power flow algorithm, provides accurate solutions therefore can address operational challenges MGs....

This paper is concerned with the optimal operation of microgrids, which progressively operate closer to their stability limits due high penetration renewable generation and ever-increasing interconnection main grid. To tackle this problem, proposes an appropriate transient constrained OPF (TSC-OPF) that integrates system dynamic constraints governed by relevant differential equations. A direct transcription method specifically a simultaneous collocation utilized, as it has been found exhibit...

Given that MGs have started becoming common in industrial and commercial facilities close to cities, it would make sense utilize their control capabilities for increased grid services. Within this context, paper investigates the hypothesis relating technical capability of urban microgrids provision voltage management services local distribution network. A detailed AC OPF, capturing classical power flow equations, is utilized assess operation an microgrid connected a The primary objective...