NDLI: Adaptive phasor estimation algorithm to enhance numerical distance protection

Content Provider	IET Digital Library
Author	Mahari, Arash Pasand, Majid Sanaye Hashemi, Sayyed Mohammad
Abstract	This study presents an adaptive phasor estimation approach for fast numerical distance protection. The proposed method is based on signal condition assessment and choosing the proper phasor estimation method. Effects of errors caused by decaying DC component and coupling capacitor voltage transformer transients, as the main problems for distance relay impedance measurement procedure, are alleviated using the proposed adaptive method. Meanwhile, a new short window DC removal method is introduced. Thanks to the fast DC value estimation method, a short window phasor estimation method is utilised for current phasor estimation. Using the proper phasor estimation method based on voltage and current signal conditions results in more accuracy, fast decision making procedure and consequently a more reliable protection scheme. To verify the performance of the proposed method, numerous simulation studies are carried out. The results assert that the proposed adaptive method not only accelerates the relay operation, but also improves the relay accuracy which enhances numerical distance protection from security and dependability viewpoints.
Starting Page	1170
Ending Page	1178
Page Count	9
ISSN	17518687
Volume Number	11
e-ISSN	17518695
Issue Number	Issue 5, Mar (2017)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/11/5
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2016.0911
Journal	IET Generation, Transmission & Distribution
Publisher Date	2016-12-23
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Adaptive Phasor Estimation Algorithm Coupling Capacitor Voltage Transformer Transients Current Phasor Estimation Current Signal Condition DC Component DC Removal Method DC Value Estimation Method Distance Relay Impedance Measurement Electric Impedance Measurement Estimation Theory Impedance And Admittance Measurement Numerical Distance Protection Potential Transformer Power System Measurement Power System Measurement And Metering Power System Protection Power System Reliability Power System Security Relay Operation Relay Protection Reliability Reliable Protection Scheme Signal Condition Assessment Statistics Transients Voltage Signal Condition
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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