EDR-5000 IM02602007E
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.
It is required that the PCC and also the DER are equipped with a decoupling
devices.
It is required that the decoupling device of the PCC controls the PCC's circuit
breaker.
It is required that the decoupling device of the power generation unit controls the
generator circuit breaker.
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]\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]\ReCon] the 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]\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]\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”.
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