GE F650 Instruction Manual page 450

7 IEC 61850 PROTOCOL 7.3 IEC 61850 CONFIGURATOR
c) GENERIC SUBSTATION EVENT SERVICES - GSSE AND GOOSE
OVERVIEW
IEC 61850 specifies two types of peer-to-peer data transfer services: Generic Substation State Events (GSSE) and Generic
Object Oriented Substation Events (GOOSE). GSSE services are compatible with UCA 2.0 GOOSE. IEC 61850 GOOSE
services provide virtual LAN (VLAN) support, Ethernet priority tagging, and Ethertype Application ID configuration. The
support for VLANs and priority tagging allows for the optimization of Ethernet network traffic. GOOSE messages can be
given a higher priority than standard Ethernet traffic, and they can be separated onto specific VLANs. Because of the
additional features of GOOSE services versus GSSE services, it is recommended that GOOSE be used wherever
backwards compatibility with GSSE (or UCA 2.0 GOOSE) is not required.
Devices that transmit GSSE and/or GOOSE messages also function as servers. Each GSSE publisher contains a "GSSE
control block" to configure and control the transmission. Each GOOSE publisher contains a "GOOSE control block" to
configure and control the transmission. The transmission is also controlled via device settings. These settings can be seen
in the ICD and/or SCD files, or in the device configuration software or files.
IEC 61850 recommends a default priority value of 4 for GOOSE. Ethernet traffic that does not contain a priority tag has a
default priority of 1. More details are specified in IEC 61850 part 8-1.
IEC 61850 recommends that the Ethertype Application ID number be configured according to the GOOSE source. In the
F650, the transmitted GOOSE Application ID number must match the configured receive Application ID number in the
receiver. A common number may be used for all GOOSE transmitters in a system. More details are specified in IEC 61850
part 8-1.
In Enervista 650 Setup the selection between GSSE or GOOSE messages is performed in "Setpoint->Inputs/Outputs-
>Remote Comms".
If GSSE has been selected then GSSE settings will appear in "Setpoint->Inputs/Outputs->Remote Comms" menu.
If GOOSE has been selected then the user should go to main menu and open the "IEC 61850 Configurator" tool.
GSSE CONFIGURATION
IEC 61850 Generic Substation Status Event (GSSE) communication is compatible with UCA GOOSE communication.
GSSE messages contain a number of double point status data items. These items are transmitted in two pre-defined data
structures named DNA and UserSt. Each DNA and UserSt item is referred to as a 'bit pair'. GSSE messages are
transmitted in response to state changes in any of the data points contained in the message. GSSE messages always
contain the same number of DNA and UserSt bit pairs. Depending the on the configuration, only some of these bit pairs
7
may have values that are of interest to receiving devices.
GOOSE CONFIGURATION
The F650 supports two types of IEC 61850 Generic Object Oriented Substation Event (GOOSE) communication: fixed
GOOSE and configurable GOOSE. All GOOSE messages contain IEC 61850 data collected into a dataset. It is this dataset
that is transferred using GOOSE message services. The dataset transferred using the F650 fixed GOOSE is the same data
that is transferred using the GSSE feature; that is, the DNA and UserSt bit pairs.
The mapping of internal variables to transmitted DNA and UserSt bit pairs is performed in Enervista 650 Setup in menu
"Setpoint->Relay Configuration->Remote Outputs", and the fixed GOOSE dataset always contains the same DNA/UserSt
data structure.
The mapping of incomming DNA and UserSt bits to Remote Inputs is done in case of GSSE in menu "Setpoint->Inputs/
Outputs->Remote Comms".
GEK-106310AB F650 Digital Bay Controller 7-81