Ground Fault Protection of Microgrid Interconnection Lines Using Distance Relay with Residual Voltage Compensation

Yin, Yuexin; Zamani, Amin; Zhang, Z.; Yong, Fu

doi:10.1109/cpre48231.2021.9429847

Cited by 2 publications

(1 citation statement)

References 7 publications

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“…Some other researchers recommended distance protection [11][12][13]. The main advantage of this plan is the lack of influence of source impedance.…”

Section: Literature Reviewmentioning

confidence: 99%

A New Approach to AC Microgrids Protection Using a Bi-Level Multi-Agent System

Ghaffarzadeh

Bamshad

2022

IJRTEI

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Nowadays, microgrids are expanding due to their numerous benefits. However, the control and protection of microgrids is a serious challenge. All the implemented plans for the protection of microgrids have drawbacks. This study presents a bi-level multi-agent system (MAS) approach to microgrids protection. The first level is responsible for microgrid lines protection. Firstly, it calculates the pilot impedance of each line. The pilot impedance is a limited number for internal faults of the line, but it is infinite for external faults of the line. so, the line's internal fault is detected by evaluation of pilot impedance with a predetermined value. The second level is responsible for Distributed Generation (DGs) protection. Firstly, it decomposes the DGs output signals by Discrete Wavelet Transform (DWT). Then, it multiplies the summations of the first and second level's details of each signal together as CC index. CC is zero in normal grid conditions and has a negative peak with a sharp negative rate in external faults, and will experience a positive peak with a sharp positive rate for internal faults and changes with a very slow rate in case of grid's natural transitions. So, the agent detects the fault by evaluating the CC. The simulation results in a 5-bus microgrid indicate the proposed scheme protects the microgrid with a reliability of 100% with considering all microgrid's uncertainties.

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“…Some other researchers recommended distance protection [11][12][13]. The main advantage of this plan is the lack of influence of source impedance.…”

Section: Literature Reviewmentioning

confidence: 99%

A New Approach to AC Microgrids Protection Using a Bi-Level Multi-Agent System

Ghaffarzadeh

Bamshad

2022

IJRTEI

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A Qualitative Comparison of Distance-Based Protection Approaches for Active Distribution Networks

Gómez

Londoño

Flórez

2021

Tecnura

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Objective: This paper presents a qualitative comparison of different recently proposed network protection schemes that are based on the distance function. From this comparison, possible opportunities are identified to develop strategies oriented towards protecting active distribution systems. Methodology: This research is carried out in two parts: the first is to identify the fundamental theoretical aspects of distance protection, its main problems, and a description of the most important aspects of the relevant strategies proposed in recent years. The second part consists of selecting aspects and elaborating a qualitative comparison of the different protection schemes analyzed. This comparison makes it possible to establish the advantages and disadvantages of each of the relevant proposals used in conventional electrical networks or active distribution networks. Results: As a result of this research, the most important aspects to consider in the protection design are identified, which therefore strongly affect its performance. These are summarized in a comparative table, which supports future research related to distance protection in active distribution networks. Conclusions: From this research, it can be stated that the solutions analyzed, despite being relevant within the scope of distance protection applied to active distribution networks, have problems to solve. None of these strategies protects the network for all types of failures in a selective, sensitive, reliable, and cost-effective way while guaranteeing minimum supply interruption to consumers. Funding: This paper is a result from projects 6-20-6 funded by Universidad Tecnológica de Pereira and contract 774-2020 (Integra2023) funded by Minciencias, Colombia.

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Ground Fault Protection of Microgrid Interconnection Lines Using Distance Relay with Residual Voltage Compensation

Cited by 2 publications

References 7 publications

A New Approach to AC Microgrids Protection Using a Bi-Level Multi-Agent System

A New Approach to AC Microgrids Protection Using a Bi-Level Multi-Agent System

A Qualitative Comparison of Distance-Based Protection Approaches for Active Distribution Networks

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