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Operating Instructions
SYN 5201/SYN 5202
Document No Art Part
Language Revision
page
abb
ABB Switzerland Ltd
3BHS109762 E01
en D 12
Template: CHIND Techn doc stand, A4 P de, R1.DOT; Filename: 3BHS109762E01 D.doc; Print: 12/6/2011 5:48:00 PM; Save: 12/1/2011 2:37:00 PM; CHIND No. 3BHS109763 ZAB D14 Rev. -; I-Q
Voltage matcher with variable pulse times
The voltage matcher issues a command the length of which is proportional to the current
voltage difference. The proportionality factor dU/dt can be adapted to the voltage
regulator. The voltage matcher aims at a value in the middle of the set tolerance band.
The adjusting command length tp U is:
dt
dU
U
U
U
tpU
/
2
max
max
The adjusting pulse is discontinued as soon as the voltage difference passes through
the target value. The command length does not fall below a settable minimum value.
After an adjusting command, the system waits for the set pulse interval ts U so that the
actual values can stabilise to the new setpoint.
Voltage matching with variable intervals
The function INVERSE U changes the way the voltage matcher functions. The pulses
are now always the same length, but the intervals are inversely proportional to the
voltage difference.
Pulse length: adjustable by means of the parameter tp Umin: tp = tp Umin
Pause interval: adjustable by means of the parameter ts U; dependent on ts U and
Umax:
0
2
max
max
*
325
,
0
1
*
U
U
U
U
ts
ts
Voltage matcher for tap changer
The function TAP CHANGER allows constant pulse durations and pulse intervals to be
generated, which is necessary for matching by means of the tap changer.
Middle of tolerance band
Adjusting pulse
Pulse interval time
Generator voltage
Voltage difference
Time
Set point voltage regulator
S00006
-
Umax
0
+
Umax
tp U
ts U
U
t
dU
dt