NDLI: Faulty feeder selection and segment location method for SPTG fault in radial MMC-MVDC distribution grid

Content Provider	IET Digital Library
Author	Zeng, Yu Zou, Guibin Zhang, Xin Wei, Xiuyan Jiang, Lingtong Sun, Chenjun
Abstract	As a modular multilevel converter-based medium-voltage direct current (MMC-MVDC) distribution grid mostly utilises small current grounding modes, the weak fault current for single-pole-to-ground (SPTG) fault is very difficult to detect especially in the case of noises and fault resistance. Therefore, this study proposes a fast and accurate faulty feeder selection and segment location method. For SPTG fault, the transient current fault component is the charge–discharge current of distributed capacitance on the DC feeder. Analysis indicates that the waveforms of current fault component of positive and negative poles are negatively correlated for a faulty feeder; while they are positively correlated for a non-faulty feeder. According to these characteristics, a faulty feeder selection criterion using Pearson correlation coefficient (PCC) is constructed. Then, utilising the energies difference between the current fault components of two poles, the faulty pole can be verified. In addition, the faulty segment is located by the PCC of the current fault component on both sides of each segment. Finally, simulation results confirm the validity of the proposed faulty feeder selection and segment location method.
Starting Page	223
Ending Page	233
Page Count	11
ISSN	17518687
Volume Number	14
e-ISSN	17518695
Issue Number	Issue 2, Jan (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/14/2
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2018.6934
Journal	IET Generation, Transmission & Distribution
Publisher Date	2019-11-15
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Current Grounding Modes DC Distribution System DC Feeder Distribution Network Earthing Fast Faulty Feeder Selection Criterion Fault Location Fault Resistance Modular Multilevel Converter-based Medium-voltage Direct Current Distribution Grid Negative Poles Nonfaulty Feeder PCC Pearson Correlation Coefficient Positive Poles Power Converter Power Distribution Fault Power Distribution Protection Power Grid Power Supplies to Apparatus Power System Protection Power System Transients Radial MMC-MVDC Distribution Grid Single-pole-to-ground Fault SPTG Fault Transient Current Fault Component Weak Fault Current
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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