Open AccessNew method for calculating voltage dip/swell types based on six‐dimensional vectors and Euclidean distance
Author(s) -
Wang Ying,
Yu HuaXi,
Xiao XianYong,
Ma Ming,
Zhou Yuan
Publication year - 2019
Publication title -
iet generation, transmission and distribution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.92
H-Index - 110
eISSN - 1751-8695
pISSN - 1751-8687
DOI - 10.1049/iet-gtd.2019.0532
Subject(s) - swell , euclidean distance , voltage , chart , range (aeronautics) , computer science , euclidean geometry , algorithm , mathematics , engineering , artificial intelligence , electrical engineering , physics , geometry , statistics , thermodynamics , aerospace engineering
The type of voltage dip or swell is an important information for utilities and customers to reduce the negative impact by voltage dip/swell. This study proposes a method to calculate the voltage dip/swell type, by transforming the three‐phase voltage vector to a six‐dimensional vector, generating a whole‐range database and calculating the Euclidean distances between the measured voltage dip/swell and the synthetic voltage vectors in database. The voltage dip/swell type is determined by the minimum Euclidean distance. The accuracy of the proposed method is verified by the tens of thousands of synthetic dips/swells and 203 sets of measured voltage dips/swells. Extensive comparison has been done, including the comparison between the proposed method and the typical algorithms. It is proved that the proposed method can overcome the shortcomings of the typical algorithms and shows good performance in two scenarios. Finally, a practical dip type chart is proposed for evaluating the event type quickly for the engineers who are interested in quick evaluation of the potential dip type.