A New Method to Detect Line-to-Ground Faults in DC Microgrids Using Instantaneous Power Changes
Subject Areas : electrical and computer engineering
Said Abbasi
1
,
N. Ghaffarzadeh
2
*
1 -
2 - Imam Khomeini International University
Keywords: DC microgridnon-unit protectionline to ground faultinstantaneous power changesfault detection,
Abstract :
With the increasing of sensitive loads such as data centers, the use of DC microgrids has increased. Line to ground fault is the most common type of fault in this type of microgrid, which causes various damages to the DC microgrid. One of the most important challenges in operating a DC microgrid is the lack of effective protection against this faults type. In this paper, by using local measurements such as voltage and current at the beginning of each line, the instantaneous power changes in them are computed and a new protection scheme that is not based on any communication line is presented. The proposed protection scheme has good accuracy and speed of operation and is able to detect line-to-ground faults in DC microgrids with high-speed. The accuracy and precision of the protection scheme has been tested under different conditions.
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