Is a massive deployment of renewable-based low voltage direct current microgrids feasible? Converters, protections, controllers, and social approach

Castillo-Calzadilla, Tony; Cuesta, M.A.; Quesada, Carlos; Olivares-Rodríguez, Cristian; Macarulla, Ana M.; Legarda, Jon; Borges, Cruz E.

doi:10.1016/j.egyr.2022.09.067

Cited by 12 publications

(2 citation statements)

References 165 publications

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“…Mode A is the DC microgrid powered by the commercial network. A standalone DC microgrid with energy storage as power supply to the load is considered model B, while a standalone DC microgrid with energy storage for energy support is considered model C. Some of the technical issues associated with low-voltage DC microgrids such as Instability issues at LVDC-MGs, harmonics, virtual resistors, over-voltage, under-voltages, low inertia, and bidirectional power flow are discussed in [13]. Authors in [14] provide an overview of the comparison of existing DC microgrid and AC microgrid systems.…”

Section: Introductionmentioning

confidence: 99%

Microgrids Overview and Performance Evaluation on Low-voltage Distribution Network

Johnson Aladesanmi,

A. Ogudo

2023

Clean Energy and Sustainability

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Besides the increase in global energy demand, access to clean energy, reduction in greenhouse gas emissions caused by conventional power generation techniques, energy security, and availability of electricity in remote villages in emerging nations are some of the factors that foster the use of renewable energy sources (RESs) in generating electricity. One of the aims of initiating microgrids (MGs) is to maximize the benefits of RES while alleviating grid-connect issues. Microgrids are interconnected RESs and electrical loads within clearly delineated electrical limits that operate as individual controllable units on the electrical network. It can operate independently and be gridconnected. The paper presents a review and performance assessment of renewable energy-based microgrids under various operating scenarios in stand-alone, grid-connected, and transitioning modes of operation. Fault occurrences, an increase in micro-source generation, a load increase, and the sudden disconnection of a micro-source are some of the simulated scenarios. Microgrid network components' performance, such as the bidirectional DC-DC converter and energy storage system (ESS), was evaluated. The simulated microgrid architecture includes a small hydroelectric plant, wind farm, and ESS. The work provides valuable information to energy stakeholders on the performance of microgrids in low-voltage distribution networks. The microgrid is coupled to a low-voltage distribution network (0.415 kV) via a PCC. The system under investigation is modeled and simulated using MATLAB/Simulink. From the simulation analysis, the fault effect was felt on the utility and did not escalate to the microgrid side during stand-alone operation. Power quality issues, such as voltage rise, are some of the challenges identified during the transition from one mode of operation to another. However, the energy storage system responds to disturbances and maintains system stability. The originality of this paper is based on evaluating different modes of operation of microgrids and comparing system performances under various operating conditions.

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Section: Introductionmentioning

confidence: 99%

Microgrids Overview and Performance Evaluation on Low-voltage Distribution Network

Johnson Aladesanmi,

A. Ogudo

2023

Clean Energy and Sustainability

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“…Early research on DC distribution grids focused on low-voltage DC distribution grids. In 2007, researchers at Virginia Tech categorized DC distribution systems into two voltage levels, 380 V and 40 V, to provide power primarily to homes and buildings [3]. RWTH Aachen University in Germany realized a DC distribution system with a medium-voltage DC ring network as the backbone network.…”

Section: Introductionmentioning

confidence: 99%

Protection Scheme for Transient Impedance Dynamic-Time-Warping Distance of a Flexible DC Distribution System

Ni,

He,

et al. 2023

Sustainability

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Flexible DC power distribution systems have characteristics such as rapid fault occurrence and fragile power electronics. DC faults usually result in rapid converter blocking (2–5 ms). However, existing protection schemes are susceptible to distributed capacitance, cannot tolerate long communication delays, and require artificial boundaries, among other features that make it impossible to combine speediness, selectivity, and reliability. A technique based on normalized transient impedance dynamic-time-warping (DTW) distance is proposed to improve the performance of the protection scheme. First, the fault equivalent circuit of the flexible DC distribution system (±10 kV) is established, and its transient impedance expression is derived accordingly. Subsequently, the expression components are split and their fault characteristics are resolved separately. Finally, the protection scheme for normalized DTW distance is proposed based on the transient impedance fault characteristics. A flexible DC distribution system (±10 kV) is established to verify the performance of the scheme.

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Optimal Control Solution for Bidirectional AC-DC Interlinking Converter

Reddy,

Saikia

2024

Lecture Notes in Electrical Engineering

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Is a massive deployment of renewable-based low voltage direct current microgrids feasible? Converters, protections, controllers, and social approach

Cited by 12 publications

References 165 publications

Microgrids Overview and Performance Evaluation on Low-voltage Distribution Network

Microgrids Overview and Performance Evaluation on Low-voltage Distribution Network

Protection Scheme for Transient Impedance Dynamic-Time-Warping Distance of a Flexible DC Distribution System

Optimal Control Solution for Bidirectional AC-DC Interlinking Converter

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