NDLI: Multi-criteria protection scheme for online element failure detection in shunt capacitor banks

Content Provider	IET Digital Library
Author	Goodarzi, Ali Allahbakhshi, Mehdi Tajdinian, Mohsen Popov, Marjan
Abstract	This paper deals with a fault detection investigation of SCBs, and it is focused on the faulty phase detection and the number of faulty capacitor units. Unlike previous methods, the proposed method provides a relay decision making criterion which determine the faulty capacitors, and the number of capacitor failures in case of multiple faulty phase conditions. The proposed algorithm is applied on different wye configurations of SCBs considering different protection designs (i.e., fuseless, internally and externally fused units). Since the detection of capacitor failures in SCBs are based on the fundamental phasor component, there may occur a significant delay in decision making in the case of an external short circuit fault in the power system. The aforementioned condition, which will be mathematically proven, happens due to a capacitor discharge after fault clearance. To deal with this condition, a method is proposed by applying an algorithm, in which the fundamental component of the voltage signal is extracted in one cycle. Performance evaluations associated with the proposed method are provided for different fault conditions, fault locations, and different levels of harmonics and, they are further discussed through the implementation of the proposed method in MATLAB environment.
Starting Page	4152
Ending Page	4163
Page Count	12
ISSN	17518687
Volume Number	14
e-ISSN	17518695
Issue Number	Issue 19, Oct (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/14/19
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2020.0347
Journal	IET Generation, Transmission & Distribution
Publisher Date	2020-06-22
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Capacitor Capacitor Discharge Capacitor Failure Decision Making Different Protection Designs Different Wye Configurations External Short Circuit Fault Externally Fused Units Fault Clearance Fault Detection Investigation Fault Diagnosis Fault Location Faulty Capacitor Faulty Capacitor Units Faulty Phase Detection Multicriteria Protection Scheme Multiple Faulty Phase Condition Online Element Failure Detection Other Power Apparatus And Electric Machine Power Capacitor Power System Power System Protection Power Transmission Fault Relay Decision-making Criterion Reliability SCBs Shunt Capacitor Banks Undesirable Performance
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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