Woodward LS-5 v2 Series - 4.3.1.12 QV Monitoring

4.3.1.12 QV Monitoring
General notes
In case of mains undervoltage some grid codes require a special monitoring function to
avoid the import of inductive reactive power at the mains interchange point. The
monitoring function measures close to system A. For this reason the QV monitoring is a
function of system A voltage and system A reactive power.
QV monitoring is triggered if the following conditions are ful󰈡lled.
•
QV monitoring is con󰈡gured to "On" (parameter 3292)
• Measured reactive power is higher than the con󰈡gured “Reactive power threshold”
(parameter 3291)
• Measured voltages are below the con󰈡gured “Limit undervoltage” (parameter 3285)
As a result Timer 1 and Timer 2 are starting. If the delay time "Delay step 1" (parameter
3283) has exceeded, LogicsManager 07.29 becomes TRUE and the corresponding alarm
message "SyA. QV monitoring 1" is indicated. If the delay time "Delay step 2" (parameter
3284) has exceeded, LogicsManager 07.30 becomes TRUE and the corresponding alarm
message "SyA. QV monitoring 2" is indicated.
If parameter "SyA. decoupling" (parameter 3295) is con󰈡gured to "On" the decoupling
function is assigned to “Delay step 1” (parameter 3283) or "Delay step 2" (parameter
3284).
The LogicsManager command
󰈢ags 07.29 and 07.30 can be additionally used to cause
other actions according to the corresponding regulations of the grid.
119LS-5 v2 Series37650
4 Con󰈡guration
4.3 Con󰈡gure Monitoring
Released