A Г-Source Circuit Breaker for DC Microgrid Protection

Zhou, Zhongzheng; Jiang, Jianguo; Liu, Cong; Zhang, Dan

doi:10.1109/tie.2020.2972431

Cited by 46 publications

(6 citation statements)

References 37 publications

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“…Other studies have employed unidirectional and bidirectional Z-source DCCB (Z-s DCCB) designs, whose strategy is focused on a capacitor-based design [61][62][63][64][65][66]. Z-s DCCBs All three capacitor-based DCCB designs mentioned in Table 4 redirect surges to a subcircuit to reduce the impact of energy released during DC system faults or surges.…”

Section: Capacitor-based Dccbsmentioning

confidence: 99%

DC Circuit Breaker Evolution, Design, and Analysis

Moradian,

Lie,

Gunawardane

2023

Energies

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While traditional AC mechanical circuit breakers can protect AC circuits, many other DC power distribution technologies, such as DC microgrids (MGs), yield superior disruption performance, e.g., faster and more reliable switching speeds. However, novel DC circuit breaker (DCCB) designs are challenging due to the need to quickly break high currents within milliseconds, caused by the high fault current rise in DC grids compared to AC grids. In DC grids, the circuit breaker must not provide any current crossing and must absorb surges, since the arc is not naturally extinguished by the system. Additionally, the DC breaker must mitigate the magnetic energy stored in the system inductance and withstand residual overvoltages after current interruption. These challenges require a fundamentally different topology for DCCBs, which are typically made using solid-state semiconductor technology, metal oxide varistors (MOVs), and ultra-fast switches. This study aims to provide a comprehensive review of the development, design, and performance of DCCBs and an analysis of internal topology, the energy absorption path, and subcircuits in solid-state (SS)-based DCCBs. The research explores various novel designs that introduce different structures for an energy dissipation solution. The classification of these designs is based on the fundamental principles of surge mitigation and a detailed analysis of the techniques employed in DCCBs. In addition, our framework offers an advantageous reference point for the future evolution of SS circuit breakers in numerous developing power delivery systems.

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Section: Capacitor-based Dccbsmentioning

confidence: 99%

DC Circuit Breaker Evolution, Design, and Analysis

Moradian,

Lie,

Gunawardane

2023

Energies

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“…In the Refs. [92,93], a solid-state breaker circuit for DCMG is proposed, which replaces ZSCB LC elements by a transformer, decreasing the amount of elements in the circuit and decreasing the weight. The switch was called T-Z-source Circuit Breakers (T-ZSCBs).…”

Section: Z-source: the New Generation Of Sscbsmentioning

confidence: 99%

Circuit Breakers in Low- and Medium-Voltage DC Microgrids for Protection against Short-Circuit Electrical Faults: Evolution and Future Challenges

et al. 2021

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This paper deals with circuit breakers (CBs) used in direct current microgrids (DCMGs) for protection against electrical faults, focusing on their evolution and future challenges in low voltage (<1.5 kV) and medium voltage (between 1.5 kV and 20 kV). In recent years, proposals for new circuit-breaker features have grown. Therefore, a review on the evolution of circuit breakers for DCMGs is of utmost importance. In general terms, this paper presents a review concerning the evolution of circuit breakers used in DCMGs, focusing on fuses, mechanical circuit breakers (MCBs), solid-state circuit breakers (SSCBs), and hybrid circuit breakers (HCBs). Their evolution is presented highlighting the advantages and disadvantages of each device. It was found that although modern circuit breakers have begun to be commercially available, many of them are still under development; consequently, some traditional fuses and MCBs are still common in DCMGs, but under certain restrictions or limitations. Future challenges that would allow a successful and adequate implementation of circuit breakers in DCMGs are also presented.

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“…Bidirectional IGBT–based breakers show more prominent action against fault 147 . Researchers are keen to develop a self‐isolation‐based breaker, and the ideas are reflected in Reference 148. A soft starting–based Г ‐source breaker is proposed which performs well in a different fault condition.…”

Section: Protection Devicesmentioning

confidence: 99%

A comprehensive review of distribution generation integratedDCmicrogrid protection: issues, strategies, and future direction

Sarangi

Sahu

Rout

2020

Intl J of Energy Research

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The evolution of small-scaled distributed generators and emerging power electronic devices opens up a new arena of power generation, distribution, and consumption. Operationally, the DC microgrid has attracted significant attention as it offers considerable safety benefits, cost-effectiveness, energy efficiency, and reliability as compared to traditional AC microgrid systems. Looking at the protection aspects, the DC microgrid has some serious issues both for low-voltage and mid-voltage DC system. It needs to be focused on bidirectional power flow, non-zero crossing point, detection and mitigation of grounding faults, high value of fault current, etc., for an adequate solution. In recent times, these issues are considered by various researchers to arrive at a robust and reliable approach toward protecting the DC microgrid. But certain important areas are still out of sight for researchers. In a blend of conventional and modern approaches, there are many hindrances in developing a flexible universal protective scheme. This work focuses on the protection aspects parallel with the challenges and tried to unearth the loopholes which open up a wider area of research to develop a more robust protective architecture. An extensive review has been done systematically and chronologically keeping in mind the DC microgrid architecture, standards, protection hurdles, traditional as well as latest protective measures, and suggested some reliable improvements. In addition, the futuristic possibility to invent a novel comprehensive approach based on the best technology and techniques is presented in a more secure, reliable, and efficient protection system to combat the power system faults, keeping in view the different modes of operation and configuration of the microgrid.

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A Г-Source Circuit Breaker for DC Microgrid Protection

Cited by 46 publications

References 37 publications

DC Circuit Breaker Evolution, Design, and Analysis

DC Circuit Breaker Evolution, Design, and Analysis

Circuit Breakers in Low- and Medium-Voltage DC Microgrids for Protection against Short-Circuit Electrical Faults: Evolution and Future Challenges

A comprehensive review of distribution generation integratedDCmicrogrid protection: issues, strategies, and future direction

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