Woodward High PROTEC MRU4, Руководство пользователя

Страница: 458 / 655

Protective Elements
PCC in HV systems
According to
VDE-AR-N 4120 a reconnection of a Distributed Energy Resource to the grid is not allowed before the
following conditions are fulfilled: The frequency of the mains/grid has to be between 47.5 and 51.5 Hz and the
voltage between 93.5 and 127 kV (100 kV level). Voltage and frequency have to be within their limits for minimum 5
minutes.
Reconnection
Conditions:
Before
reconnection
a power generation unit, it has to be secured, that mains voltage has been stabilized
sufficiently. For this a corresponding remote signal has to be available.
Set the parameter
»Reclosure Release Cond«
in the menu
[Protection Para\Set[x]\Intercon-
Prot\ReCon\Release Para] to
»
V Ext Release PCC«
.
The required parameter settings are described in the
chapter »General Settings«.
Set the blocking signals in the menu
[Protection Para\Set[x]\Intercon-Prot\ReCon] the trigger (decoupling) signals which start the mains recovery
time
(OR logic).
Select a sufficiently long recovery time »t1-Release Blo
« in the menu
[Protection Para\Set[x]\Intercon-Prot\Reconnection\Release Para]. Reconnection
is only possible after this
timer has been elapsed. This time will be started by the trigger that have to be set in:
[Global Para\Intercon-
Prot\Reconnection\Decoupling]
In the menu
[Protection Para\Set[x]\Intercon-Prot\Reconnection\Release Para]
the frequency and voltage
range to be met for reconnection can be set.
Set the paramters for the release of the voltage for the reconnection as described in section ”Voltage release
via remote control connection from the PCC”.
458 MRU4 DOK-HB-MRU4-2E