A New Protection Scheme for Low Voltage DC Microgrids

2021 ◽  
Author(s):  
Muhannad Alshareef
Keyword(s):  
Low Voltage ◽  
Dc Microgrids ◽  
Protection Scheme

Protection Scheme for DC Microgrid Distribution System

2012 ◽  
Vol 614-615 ◽  
pp. 1661-1665
Author(s):  
Ling Hui Deng ◽  
Zhi Xin Wang ◽  
Jian Min Duan
Keyword(s):  
Distribution System ◽  
Cost Efficiency ◽  
Power Flow ◽  
Low Voltage ◽  
Dc Microgrid ◽  
Protection Scheme ◽  
High Level ◽  
Bidirectional Power Flow ◽  
Efficiency And Reliability ◽  
Laboratory Prototype

The low voltage DC (LVDC) distribution system is a new concept and a promising technology to be used in the future smart distribution system having high level cost-efficiency and reliability. In this paper, a low-voltage (LV) DC microgrid protection system design is proposed. Usually, an LVDC microgrid must be connected to an ac grid through converters with bidirectional power flow and, therefore, a different protection scheme is needed. This paper describes practical protection solutions for the LVDC network and an LVDC system laboratory prototype is being experimentally tested by MATLAB/SIMULINK. The results show that it is possible to use available devices to protect such a system. But other problems may arise which needs further study.

Study on Protection Scheme for Low-voltage Distribution Network with Distributed Generation

2013 ◽  
Vol 12 (16) ◽  
pp. 3655-3659 ◽  
Author(s):  
Zhu Xueling ◽  
Zhou Ning ◽  
Han Fei ◽  
Li Qiang ◽  
Li Daokuan
Keyword(s):  
Distributed Generation ◽  
Low Voltage ◽  
Distribution Network ◽  
Voltage Distribution ◽  
Protection Scheme

A frequency-based economical-sharing strategy for low-voltage DC microgrids

2020 ◽  
Vol 118 ◽  
pp. 105822
Author(s):  
Ramin Babazadeh-Dizaji ◽  
Mohsen Hamzeh ◽  
Arsalan Hekmati
Keyword(s):  
Low Voltage ◽  
Dc Microgrids ◽  
Sharing Strategy

Research on D-PMSG Wind Power System with SDBR for LVRT

2013 ◽  
Vol 448-453 ◽  
pp. 1767-1772
Author(s):  
Xiong Feng He ◽  
Xian Yun Li ◽  
Tong Zhou Ji ◽  
Hao Peng ◽  
Kun Liu
Keyword(s):  
Power System ◽  
Wind Power ◽  
Low Voltage ◽  
Simulation Analysis ◽  
High Reliability ◽  
Low Cost ◽  
Synchronous Generator ◽  
Protection Scheme ◽  
Wind Power System ◽  
Grid Side

For enhancing low voltage ride though (LVRT) capability, this paper proposes a new protection scheme of series dynamic breaking resistor (SDBR) connected to the grid-side inverter (GSI) of directly driven permanent magnet synchronous generator (D-PMSG) wind power system, which has a lot of advantages such as possessing low cost, simple structure and high reliability. The structure, switching control strategy and matched resistance of SDBR are researched. The proposed scheme was then applied to uplift GSI voltage during a fault, maintain active power delivered to grid, inhibit DC-link overvoltage and GSI overcurrent. The simulation analysis shows that the SDBR can substantially improve the LVRT capacity of D-PMSG wind power system in PSCAD/EMTDC.

scholarly journals Stability and reliability of low voltage hybrid AC-DC microgrids power flow model in islanding operation

2020 ◽  
Vol 19 (1) ◽  
pp. 32
Author(s):  
Hasti Afianti ◽  
Ontoseno Penangsang ◽  
Adi Soeprijanto
Keyword(s):  
Power Flow ◽  
Low Voltage ◽  
Flow Analysis ◽  
Steady State Condition ◽  
Dc Microgrids ◽  
Load Power ◽  
Bidirectional Converter ◽  
Islanding Operation ◽  
Stable Frequency ◽  
The Stability

The problem of decreasing and increasing power flow in hybrid AC-DC microgrids in island operations is the concern of this research. This condition arises if one sub-microgrid cannot supply load power requirements, either due to a decrease in power at the source or an increase in load on the sub-microgrid network. As a result, in this research used the bidirectional converter as an interlinking converter, the converter can change the power flow from the ac sub microgrid to the dc sub microgrid and vice versa. With this bidirectional converter, load power requirements can be met even though there is a power change in one of the sub microgrid. The simulation in this research support by Simulink/Matlab software. The model is built in a low voltage system, and the power flow analysis is in steady-state condition with two different cases. The simulation results show the stability and reliability of the power flow in both sub microgrid with stable frequency and voltage when power and load change occur.

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