Open AccessThird harmonic current minimization using third harmonic blocking transformer
Author(s) -
Vishnuprasada Vittal Bhat,
Pinto Pius
Publication year - 2022
Publication title -
indonesian journal of electrical engineering and computer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.241
H-Index - 17
eISSN - 2502-4760
pISSN - 2502-4752
DOI - 10.11591/ijeecs.v25.i2.pp697-709
Subject(s) - transformer , electrical impedance , minification , symmetrical components , electromagnetic coil , voltage , three phase , electrical engineering , single phase , harmonic , harmonic analysis , engineering , blocking (statistics) , electronic engineering , control theory (sociology) , computer science , physics , acoustics , computer network , control (management) , artificial intelligence , programming language
Zero sequence blocking transformers (ZSBTs) are used to suppress third harmonic currents in 3-phase systems. Three-phase systems where single-phase loading is present, there is every chance that the load is not balanced. If there is zero-sequence current due to unequal load current, then the ZSBT will impose high impedance and the supply voltage at the load end will be varied which is not desired. This paper presents Third harmonic blocking transformer (THBT) which suppresses only higher harmonic zero sequences. The constructional features using all windings in single-core and construction using three single-phase transformers explained. The paper discusses the constructional features, full details of circuit usage, design considerations, and simulation results for different supply and load conditions. A comparison of THBT with ZSBT is made with simulation results by considering four different cases.