三绕组变压器阻抗折算

为薇薇

Conversion of equivalent Delta to Y circuit impedance of 3-winding transformers

晨曦里的啊不

The impedances required in ETAP Transformer Editor are test data (or short-circuit
2 _% l$ h) b. ^9 i- vimpedances) given by manufacturer. They are NOT THE EQUIVALENT Delta-circuit
7 @! R8 y: ~/ u1 S' h, L5 Qimpedances of transformer. These values can be converted to the individual winding
impedances or the equivalent Y-circuit impedances using the following formulas:
/ i; }7 x7 {4 _# OZp = 0.5 (Zps + Zpt – Zst)
Zs = 0.5 (Zps + Zst – Zpt)
8 r0 ?  d" L- FZt = 0.5 (Zpt + Zst – Zps)
To obtain the equivalent Delta-circuit impedances the Y to D-circuit transformation
formula is as follows:
" X3 l" n: x; m7 {5 s# i) SZPS = (ZpZs + ZpZt + ZsZt)/Zt
7 T# s- \; v$ a# I" hZPT = (ZpZs + ZpZt + ZsZt)/Zs
ZST = (ZpZs + ZpZt + ZsZt)/Zp

lowlcity

谢谢分享