3.4.4.3 Generic Substation State Event (Function Group GSSE)
For high-speed exchange of information between individual IEDs (intelligent
electronic devices) in a local network, the P631 provides, as an additional
functionality, the GSSE function group (UCA2.0-GOOSE) as defined in the
IEC 61850 standard. GSSE features high-speed and secure transmission of logic
binary state signals such as reverse interlocking, trip commands, blocking,
enabling and other signals.
3.4.4.3.1 Configuration and Enabling
Function Group GSSE can be configured by setting the parameter
GSSE: Function group GSSE. This parameter is only visible if the optional
Ethernet communication module is fitted to the P631. After configuration of
GSSE, all data points associated with this function group (setting parameters,
binary state signals etc.) become visible. The function can then be enabled or
disabled by setting GSSE: General enable USER.
The setting parameters for function groups IEC, GOOSE and GSSE in the P631 are
not automatically activated. The P631 features two memory “banks” one of
which includes the active setting parameters. The other memory bank is used
with the configuration procedure for parameters from the IED Configurator and
the operating system. Specific project-related extensions of the IEC 61850
parameters from the IED Configurator are loaded into the P631 by downloading
a .MCL file. The inactive communication parameters are activated by executing
the command IEC: Switch Config. Bank. This command may also be issued
from the IED Configurator.
3.4.4.3.2 Sending GSSE
With GSSE up to 32 logic binary state signals can be sent. Selection of binary
state signals is made by setting GSSE: Output 1 fct.assig. (or Output 2, …,
Output 32). Each selected state signal is to be assigned to a bit pair in GSSE
(GSSE: Output 1 bit pair (or Output 2, …, Output 32)), which will transmit
this state signal.
GSSE is automatically sent with each state change of a selected state signal.
There will be multiple send repetitions at ascending time periods. The first send
repetition occurs at the given cycle time set with the parameter GSSE: Min.
cycleThe cycles for the following send repetitions result from a conditional
equation with the increment set with the parameter GSSE: Increment. Should
no further state changes occur up to the time when the maximum cycle time has
elapsed (GSSE: Max. cycle), then GSSE will be sent cyclically at intervals as
set for the max. cycle time.
In order to have unambiguous identification of a GSSE sent, the IED name is used
which was set in function group IEC.
3.4.4.3.3 Receiving GSSE
With GSSE up to 32 logic binary state signals can be received. Configuration of
the logic binary state signals received (GOOSE: Input 1 fct.assig., or Input 2,
…, Input 32) is made on the basis of the selection table of the binary inputs (opto
coupler inputs).
For each state signal to be received, the GSSE message, which will include the
required information, must be selected by setting the IED name (e.g.
GSSE: Input 1 IED name). Selection of information wanted from the selected
GSSE will occur by setting the bit pair (e.g. GSSE: Input 1 bit pair).
Each GSSE includes time information on the validity duration of its information.
This corresponds to the double time period to the next GSSE repetition. If the
3 Operation
P631
P631/EN M/R-11-C // P631-310-650 3-31
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