Fault Analysis and Protection of Low-Voltage DC Microgrid Equipped by Renewable Energy Resources

2022 ◽  
pp. 978-1012
Author(s):  
Navid Bayati ◽  
Amin Hajizadeh ◽  
Mohsen Soltani
Keyword(s):  
Renewable Energy ◽  
Low Voltage ◽  
Fault Analysis ◽  
Energy Resources ◽  
Renewable Energy Resources ◽  
Dc Microgrid ◽  
Dc Microgrids ◽  
Ring Configuration ◽  
Protection Method ◽  
And Mathematics

This chapter consists of two sections, ‘Modelling of DC Microgrids' and ‘Protection of DC Microgrids'. In the first section, the new developments in DC Microgrids are discussed. Then, the Modelling of renewable energy resources-based DC Microgrid using characteristics and mathematics equations of each component are presented and then they are simulated by MATLAB. Afterward, the fault analysis and fault current behavior of the studied DC Microgrid are investigated. In the second section, a method of protecting the DC Microgrid and locating the fault in different parts of the system is proposed. The proposed method protects DC Microgrid using localized protection devices. And, the effectiveness of the proposed protection method is validated in a DC Microgrid with ring configuration.

Fault Analysis and Protection of Low-Voltage DC Microgrid Equipped by Renewable Energy Resources

2020 ◽  
pp. 341-375 ◽  
Author(s):  
Navid Bayati ◽  
Amin Hajizadeh ◽  
Mohsen Soltani
Keyword(s):  
Renewable Energy ◽  
Low Voltage ◽  
Fault Analysis ◽  
Energy Resources ◽  
Renewable Energy Resources ◽  
Dc Microgrid ◽  
Dc Microgrids ◽  
Ring Configuration ◽  
Protection Method ◽  
And Mathematics

This chapter consists of two sections, ‘Modelling of DC Microgrids' and ‘Protection of DC Microgrids'. In the first section, the new developments in DC Microgrids are discussed. Then, the Modelling of renewable energy resources-based DC Microgrid using characteristics and mathematics equations of each component are presented and then they are simulated by MATLAB. Afterward, the fault analysis and fault current behavior of the studied DC Microgrid are investigated. In the second section, a method of protecting the DC Microgrid and locating the fault in different parts of the system is proposed. The proposed method protects DC Microgrid using localized protection devices. And, the effectiveness of the proposed protection method is validated in a DC Microgrid with ring configuration.

scholarly journals Optimal operation of hybrid AC/DC microgrids under uncertainty of renewable energy resources: A comprehensive review

2019 ◽  
Vol 109 ◽  
pp. 139-159 ◽  
Author(s):  
Motahareh Pourbehzadi ◽  
Taher Niknam ◽  
Jamshid Aghaei ◽  
Geev Mokryani ◽  
Miadreza Shafie-khah ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Optimal Operation ◽  
Energy Resources ◽  
Renewable Energy Resources ◽  
Comprehensive Review ◽  
Dc Microgrids

scholarly journals A Fuse Saving Scheme for DC Microgrids With High Penetration of Renewable Energy Resources

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 137407-137417 ◽  
Author(s):  
Navid Bayati ◽  
Hamid Reza Baghaee ◽  
Amin Hajizadeh ◽  
Mohsen Soltani
Keyword(s):  
Renewable Energy ◽  
Energy Resources ◽  
Renewable Energy Resources ◽  
Dc Microgrids ◽  
High Penetration

scholarly journals Microgrid: Innovation, Challenges and Prospects

2021 ◽  
Vol 9 (10) ◽  
pp. 484-489
Author(s):  
Zaineb Nisar Jan
Keyword(s):  
Renewable Energy ◽  
Fossil Fuels ◽  
Energy Resources ◽  
Renewable Energy Resources ◽  
Distributed Energy ◽  
Energy Storage Devices ◽  
Dc Microgrid ◽  
Storage Devices ◽  
Microgrid Energy Management ◽  
Present World

Abstract: In the present world where environmental issues are posing a great threat to the survival of mankind a better yet effective way of reducing carbon emissions and improving the environment by less usage of fossil fuels was suggested. This approach was called microgrid (MG). Renewable energy resources could be used effectively to produce electricity and can be easily integrated with the conventional grid. This paper elaborates on the basic concept of microgrid, and then describes the challenges and future prospects of the microgrid. Distribution generators along with energy storage devices and proper interfacing power electronic devices are used. Working on the basis of the type of microgrid is also discussed in this paper. Keywords: Renewable energy resources, distributed energy, AC microgrid, DC microgrid, energy management.

scholarly journals A Photovoltaic-Based DC Microgrid System: Analysis, Design and Experimental Results

Electronics ◽  
2020 ◽  
Vol 9 (6) ◽  
pp. 941 ◽  
Author(s):  
Xiaoling Xiong ◽  
Yuchen Yang
Keyword(s):  
Renewable Energy ◽  
Stability Analysis ◽  
Nonlinear Analysis ◽  
Control Strategy ◽  
Closed Loop ◽  
Boost Converter ◽  
Energy Resources ◽  
Analysis Method ◽  
Renewable Energy Resources ◽  
Dc Microgrid

Due to the exhaustion of fossil energy, the utilization of renewable energy resources is developing quickly. Due to the intermittent nature of the renewable energy resources, the energy storage devices are usually adopted in renewable power generation system to enhance the system reliability. In this paper, the photovoltaic-based DC microgrid (PVDCM) system is designed, which is composed of a solar power system and a battery connected to the common bus via a boost converter and a bidirectional buck/boost converter, respectively. As the photovoltaic (PV) panels might operate in a maximum power point tracking (MPPT) mode or constant voltage mode, meanwhile, the power can flow between the battery and the load bidirectionally. Therefore, for the sake of optimizing power utilization in the PVDCM system, a control strategy making the system able to switch from one operating mode to another smoothly and automatically is proposed in this paper. Moreover, the small-signal modeling method based on averaged state-space is no more applicable in this study, thus the nonlinear analysis method with discrete-time mapping model is adopted for stability analysis. Based on the stability analysis, the closed-loop parameters are designed to make sure the whole system can operate properly in all operating modes. The control strategy and stability analysis based on the nonlinear analysis method in the closed-loop design are verified by experiment results.

scholarly journals Control Strategy of Hybrid AC/DC Microgrid in Standalone Mode

2020 ◽  
Vol 9 (2) ◽  
pp. 295-301
Author(s):  
Nabil Qachchachi ◽  
Hassane Mahmoudi ◽  
Abdennebi El Hassnaoui
Keyword(s):  
Renewable Energy ◽  
Power System ◽  
Residential Buildings ◽  
Storage System ◽  
Energy Resources ◽  
Mixed Integer ◽  
Renewable Energy Resources ◽  
Dc Microgrid ◽  
Power System Control ◽  
Time Operation

The fluctuation of production of renewable energy resources (RESs) is a big problem for its installation and integration in isolated residential buildings. A hybrid AC/DC microgrid facilitates the good operation of RESs with a storage system in standalone mode and the possibilities of smart energy management. In this paper optimization research of the hybrid ac/dc microgrid in isolated mode of operation is presented. The power system is supplied by various Renewable Energy Resources (RESs), Photovoltaic arrays (PVA), a Wind Turbine Generator (WTG), Diesel Generator (DG) and supported by Batteries Storage System (BSS) for short term storage. The main objective of this study is to optimize power flow within a hybrid ac/dc microgrid with regards to reliability in islanded mode. First a mathematical model optimized by mixed integer linear programming and solved by CPLEX solver with JAVA language is developed for an islanded RES system and then, based on the developed model, the power system control is simulated for different cases of off-grid mode. Simulation results have shown that the management strategy can maintain power balancing while performing optimized control and give a controllable loads and batteries charging/discharging powers, even with unpredictability of RESs powers outputs and arbitrary energy tariffs. Finally, the proposed algorithm respects the optimization in real-time operation under various constraints.%.©2020. CBIORE-IJRED. All rights reserved

Simulation of a Low Voltage Grid with Power Generation from Renewable Energy Resources

2014 ◽  
Vol 918 ◽  
pp. 195-199
Author(s):  
Florin Dragomir ◽  
Otilia Elena Dragomir
Keyword(s):  
Power Generation ◽  
Renewable Energy ◽  
Energy Supply ◽  
Low Voltage ◽  
Renewable Energy Sources ◽  
Energy Resources ◽  
Energy Sources ◽  
Renewable Energy Resources ◽  
Security Of Supply ◽  
Three Phase

Renewable energy source (RES) enables us to diversify our energy supply. Renewable energy sources are getting more and more widespread, mainly due to the fact that they generate energy by keeping the environment clean. This increases our security of supply and improves European competitiveness creating new industries, jobs, economic growth and export opportunities, whilst also reducing our greenhouse gas emissions. This article proposes a simulation of a three-phase low voltage grid with power generation from photovoltaic sources. The proposed system consists of 192 photovoltaic (PV) panels distributed in 32 rows with each 12 PV panels.

scholarly journals Implementation and Optimal Control of DC Microgrid

2021 ◽  
Vol 7 (05) ◽  
pp. 89-95
Author(s):  
Ohm Vignesh V & Dr. Latha Mercy E
Keyword(s):  
Critical Load ◽  
Research Work ◽  
Buck Converter ◽  
Energy Resources ◽  
Solar Array ◽  
Renewable Energy Resources ◽  
Power Conditioning ◽  
Dc Microgrid ◽  
Power Sources ◽  
Dc Microgrids

The degradation of non-renewable energy resources has been increasing widely. The objective of this research is to effectively utilize solar power using DC microgrid technology. Compared with AC microgrids, DC microgrids obtain some advantages and more suitable to access distributed power sources. A methodology “Plug and Play” approach based on the “System of Systems” philosophy controls interconnecting several elements to a DC microgrid. The main aim of this research work is to supply the power to the critical load at any condition. When power availability is less, the non-critical load will be cut down to manage the critical load. In this system, solar array, AC grid (EB), and battery are used as sources and are connected to the buck converter for power conditioning.

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