2WTr model When COD1=-1 in PSS/E?

asked 2025-06-18 03:46:56 -0500

1 ●4 ●5 ●5

updated 2025-06-18 03:59:50 -0500

When COD1=-1?

1 - stand for regulated voltage -1 - non adjustable (but regulated voltage?)

[A]When to use it and base on [B]what input column in two winding transformer PSS/E form this property is set? [B] Answer . It seems this The property is updated Base on Auto Adjust flag = "true". [A] Answer . When tap changer is not regulating (it is FIXED ULTC or it is FIXED DETC)

Can any one confirm [A] and [B]

Extract from documentation: if the control mode is entered as positive number, automatic adjustment of this transformer winding is enabled when corresponding adjustment is activated during power flow solutions a negative control mode suppresses automatic adjustment of this transformer winding?

answered 2025-06-19 08:29:50 -0500

perolofl

3642 ●1 ●9 ●21

The code becomes negative when "Auto Adjust" is disabled for the transformer:

image description

The code change is confirmed in progress window:

 Power flow data changed for two-winding transformer circuit "1" from 204 [SUB500      500.00] to 205 [SUB230      230.00]:
 X----------------ORIGINAL----------------X  X---------------NEW VALUE----------------X  DATA ITEM
                        1                                          -1                    COD1

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Thank you for confirming that when AutoAdjust = false and additionaly Control Mode = 1 (Voltage) gives as result COD1=-1. This confirms also that when AutoAdjust = true and and Control Mode =1 then COD1=1. When setting control mode = None I assume that I will get COD1=0. Is it this right conclusion?

_____ja ( 2025-06-20 06:44:49 -0500 )edit

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2WTr model When COD1=-1 in PSS/E?

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