Modeling and Analysis of Three-Phase Distribution Transformer Connections by Phase-Coordinates Based on Matrix Operation Method

2020 ◽  
Author(s):  
Zhigang Zhang ◽  
Mingrui Mo ◽  
Caizhu Wu
Keyword(s):  
Phase Distribution ◽  
Distribution Transformer ◽  
Matrix Operation ◽  
Modeling And Analysis ◽  
Operation Method ◽  
Phase Coordinates ◽  
Three Phase

scholarly journals Three-phase distribution transformer connections modeling based on matrix operation method by phase-coordinates

2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
Zhigang Zhang ◽  
Mingrui Mo ◽  
Caizhu Wu
Keyword(s):  
Phase Distribution ◽  
Positive Sequence ◽  
Matrix Operation ◽  
Admittance Matrix ◽  
Magnetic Circuits ◽  
Operation Method ◽  
Phase Coordinates ◽  
Three Phase ◽  
The Matrix ◽  
Sequence Parameters

AbstractThis paper proposes a matrix operation method for modeling the three-phase transformer by phase-coordinates. Based on decoupling theory, the 12 × 12 dimension primitive admittance matrix is obtained at first employing the coupling configuration of the windings. Under the condition of asymmetric magnetic circuits, according to the boundary conditions for transformer connections, the transformers in different connections enable to be modeling by the matrix operation method from the primitive admittance matrix. Another purpose of this paper is to explain the differences of the phase-coordinates and the positive sequence parameters in the impedances of the transformers. The numerical testing results in IEEE-4 system show that the proposed method is valid and efficient.

scholarly journals Three-Phase Distribution Transformer Connections Modeling Based on Matrix Operation Method by Phase-coordinates

2020 ◽  
Author(s):  
Zhigang Zhang ◽  
Mingrui Mo ◽  
Caizhu Wu
Keyword(s):  
Phase Distribution ◽  
Positive Sequence ◽  
Matrix Operation ◽  
Admittance Matrix ◽  
Magnetic Circuits ◽  
Operation Method ◽  
Phase Coordinates ◽  
Three Phase ◽  
The Matrix ◽  
Sequence Parameters

Abstract This paper proposes a matrix operation method for modeling the three-phase transformer by phase-coordinates. Based on decoupling theory, the 12x12 dimension primitive admittance matrix is obtained at first employing the coupling configuration of the windings. Under the condition of asymmetric magnetic circuits, according to the boundary conditions for transformer connections, the transformers in different connections enable to be modeling by the matrix operation method from the primitive admittance matrix. Another purpose of this paper is to explain the differences of the phase-coordinates and the positive sequence parameters in the impedances of the transformers. The numerical testing results in IEEE-4 system show that the proposed method is valid and efficient.

scholarly journals Prediction of Core Losses of Three-Phase Distribution Transformer

2013 ◽  
Vol 7 (12) ◽  
Author(s):  
Mihail Digalovski ◽  
Krste Najdenkoski ◽  
Goran Rafajlovski
Keyword(s):  
Phase Distribution ◽  
Distribution Transformer ◽  
Three Phase ◽  
Core Losses

Building Factor of Grain-Oriented Silicon Iron (3% SiFe) with Different Thickness on 100kVA Three Phase Distribution Transformer Core

2012 ◽  
Vol 488-489 ◽  
pp. 537-541
Author(s):  
N. Ashbahani ◽  
I. Daut ◽  
Mohd Irwan Yusoff
Keyword(s):  
Power Loss ◽  
Phase Distribution ◽  
Operation Mode ◽  
Load Test ◽  
Core Material ◽  
Distribution Transformer ◽  
Silicon Iron ◽  
Three Phase ◽  
Transformer Model ◽  
Transformer Core

The power loss in laminated transformer cores is always greater than the nominal loss of the electrical steel laminations, by a factor known as the building factor. This paper discussed result of an investigation towards the effect of using two different Grain-Oriented Silicon Iron (3%SiFe) materials to the 100kVA three phase distribution transformer. The thicknesses of the material that have been used in this research are 0.23mm and 0.27mm. The transformer core will be assembled with 60o T-joint with 5mm mitred corner overlap length. Power loss has been measured using no-load test with 29 layer of lamination while nominal loss measured using Epstein test frame. At the operation mode flux density, 1.5T, the building factor of the transformer model core material with 0.23mm thickness is 1.219 while with the building factor for 0.27mm thickness is 1.250. This shows that thinner transformer core lamination is better than the other one by 2.5% during operation mode.

scholarly journals Impact of quasi-dc currents on three-phase distribution transformer installations

1992 ◽  
Author(s):  
B.W. McConnell ◽  
P.R. Barnes ◽  
F.M. Tesche ◽  
D.A. Schafer
Keyword(s):  
Phase Distribution ◽  
Distribution Transformer ◽  
Three Phase
Sign in / Sign up

Export Citation Format

Share Document