Fault Detection and Location of Photovoltaic Based DC Microgrid Using Differential Protection Strategy

A new differential current-based fast fault detection and location scheme for multiple Photovoltaic-based dc microgrid is proposed in this paper. A multiterminal dc (MTDC) distribution network is an effective solution for present grid scenario, where local distribution is incorporated primarily by p...

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Bibliographic Details
Published in:IEEE transactions on smart grid 2018-09, Vol.9 (5), p.4303-4312
Main Authors: Dhar, Snehamoy, Patnaik, R. K., Dash, P. K.
Format: Article
Language:English
Subjects:
Auxiliary power units
Circuit faults
Converters
CuSum
DC microgrid
differential current
Distributed generation
Electric power distribution
Fault detection
Fault location
Hazards
Interrupters
Mathematical analysis
microgrid protection
Microgrids
Networks
Photovoltaic cells
Photovoltaic systems
photovoltaicarray
Power cables
Power sources
Resistance
Solar cells
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Summary:A new differential current-based fast fault detection and location scheme for multiple Photovoltaic-based dc microgrid is proposed in this paper. A multiterminal dc (MTDC) distribution network is an effective solution for present grid scenario, where local distribution is incorporated primarily by power electronics based dc loads. PV systems with auxiliary power sources and local loads are used for MTDC connection, especially when ac utility grid is integrated with it by voltage source converters. Pole to pole and pole to ground faults are basically considered as dc distribution network hazards. As PV is connected through dc cable, high resistive dc arc fault is also studied in present literature. The proposed PV system is considered with arc-fault circuit interrupters as backup protection and is used to detect arcing series fault. Fast acting dc switching is considered for proposed differential current-based unit protection. A discrete frame differential current solution is considered to classify the fault type by modified cumulative sum average approach. By calculating unknown dc cable resistance accurately by non-iterative Moore-Penrose pseudo inverse technique, the fault distance is calculated. TMS320C6713 DSP based test-bench is used for verification of the scheme.
ISSN:1949-3053
1949-3061
DOI:10.1109/TSG.2017.2654267