Figure 865: Voltage matching pulse generation with variable command pulse length
Voltage matching with variable command pulse off intervals
When the setting
Voltage match mode
is set to "Variable Interval", the voltage
matching is done with variable command pulse off intervals.
The voltage match command pulses are now the same length, but the intervals are
inversely proportional to the voltage difference.
Pulse length (tpU): adjustable with the setting
Volt pulse Min Dur
(tpUmin)
Pulse off interval (tsU): adjustable with the setting
Volt pulse off Intv
, and also
dependent on settings
Voltage Diff Ov Ex
and
Voltage Diff Un Ex
as per
Equation
361
.
tsU U
U U
= ⋅ − ⋅ −
+ + −
( )
Volt pulse off Intv 1 0 325
2
.
max max
∆
∆ ∆
≥ 0
(Equation 361)
ΔU Measured voltage difference across the CB to be synchronized
+ΔUmax Setting
Voltage Diff Ov Ex
-ΔUmax Setting
Voltage Diff Un Ex
Reset of voltage raise and lower command pulses
The generated voltage raise and lower command pulses RAISE_U and LOWER_U are
immediately reset if any of the following conditions is met.
• During matching of its own CB synchronization
- If AVR lower limit alarm AVR_ALM_LO is TRUE, it resets the voltage lower
command LOWER_U. If AVR high limit alarm AVR_ALM_HI is TRUE, it resets the
voltage raise command RAISE_U.
- If the output MATCH_OK is TRUE, the raise and lower commands are reset.
1MRS759142 F
Control functions
REX640
Technical Manual
1573
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