NDLI: Algorithm for fault detection and localisation in a mesh-type bipolar DC microgrid network

Content Provider	IET Digital Library
Author	Bhargav, Reddipalli Bhalja, Bhavesh R. Gupta, Chandra Prakash
Abstract	This study proposes a new method to detect and locate the fault in a DC distribution system in the presence of distributed generators. As the mesh-type network provides good continuity of service during faults and the bipolar system transmits high power at low-voltage level to the end user, the proposed scheme has utilised 1200 V mesh-type bipolar DC microgrid network. The proposed scheme detects a fault by comparing the calculated value of fault current and pole-to-pole voltage with the pre-defined threshold values and then distinguishes internal or external fault based on an estimation of line parameters. In case of an internal fault, the estimated parameters yield the exact location of the fault. The modelling of the aforementioned DC microgrid network has been carried out in PSCAD/EMTDC environment and various faults involving pole and ground have been performed with variable fault resistance and location. The simulation results clearly indicate that the proposed technique is not only capable to detect the fault rapidly but also able to disconnect the faulty section speedily (around 1.25 ms). As the proposed method detects fault by utilising local voltages and currents, its reliability is better than the previous algorithms.
Starting Page	3311
Ending Page	3322
Page Count	12
ISSN	17518687
Volume Number	13
e-ISSN	17518695
Issue Number	Issue 15, Aug (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/13/15
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2018.5070
Journal	IET Generation, Transmission & Distribution
Publisher Date	2019-05-20
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Aforementioned DC Microgrid Network Bipolar System Calculated Value Control of Electric Power System Currents DC Distribution System Distributed Generator Distributed Power Generation Estimated Parameter Exact Location External Fault Fault Current Fault Detection Fault Diagnosis Fault Location Ground Internal Fault Local Voltage Localisation Low-voltage Level Mesh-type Network Method Detects Fault Pole-to-pole Voltage Power System Protection Power Transmission Fault Power Transmission Protection Pre-defined Threshold Value Statistics Time 1.25 Ms V Mesh-type Bipolar DC Microgrid Network Variable Fault Resistance Voltage 1200.0 V
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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