Iec 60870-5-104 Actual Values; Iec 61850 Communications; Gsse/Goose Configuration - GE D90 Plus Instruction Manual

CHAPTER 6: COMMUNICATIONS

IEC 60870-5-104 actual values

IEC 61850 communications

GSSE/GOOSE configuration

PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
Select the Actual Values > Communications > Communication menu item to open the
communications actual values window.
Figure 76: IEC 60870-5-104 actual values
There is one actual value related to the IEC 60870-5-104 communications feature.
IEC 60570-5-104 Available
Range: Yes, No
This actual value indicates whether the IEC 60870-5-104 communications feature is
available.
Plus
The D90 supports the Manufacturing Message Specification (MMS) protocol as specified
by IEC 61850. MMS is supported over the TCP/IP over Ethernet protocol stack. Polling,
unbuffered reporting, and buffered reporting are supported. Direct operate and select-
before-operate are also supported.
IEC 61850 provides two fast mechanisms to exchange information between peers in a
substation. One is used for transferring status information only, and is called Generic
Substation Status Event (GSSE). The other includes support for a variety of in-formation
types including measured values. It is called the Generic Object Oriented Substation Event
(GOOSE) mechanism.
GOOSE or GSSE messages are multicast repeatedly across a substation LAN. All devices on
the LAN can receive these messages, but only those devices that require the data are
configured to act on them. Because there is no handshaking between devices, GOOSE and
GSSE messages can transfer changes very rapidly, making them suitable for performing
interlocking and other time-critical substation functions. The IEC 61850 server supports
both GOOSE and GSSE protocols in publisher and subscriber roles. In dual-IP redundant
configurations, the IED transmits and listens on both ports simultaneously. At the receiving
end, the message is processed only if the state change timestamp is newer than that of
the last received message. However, since the timestamp changes only when the StNum
changes, timestamps must be of sufficient resolution to delineate the state change.
IEC 61850 COMMUNICATIONS
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