16. Station communication
IEC 61850-8-1 communication protocol
The IED supports the communication protocols IEC 61850-8-1
and DNP3 over TCP/IP. All operational information and controls
are available through these protocols. However, some
communication functions, for example, horizontal
communication (GOOSE) between the IEDs, is only enabled by
the IEC 61850-8-1 communication protocol.
The IED is equipped with optical Ethernet rear port(s) for the
substation communication standard IEC 61850-8-1. IEC
61850-8-1 protocol allows intelligent electrical devices (IEDs)
from different vendors to exchange information and simplifies
system engineering. Peer-to-peer communication according to
GOOSE is part of the standard. Disturbance files uploading is
provided.
Disturbance files are accessed using the IEC 61850-8-1
protocol. Disturbance files are also available to any Ethernet
based application via FTP in the standard Comtrade format.
Further, the IED can send and receive binary values, double
point values and measured values (for example from MMXU
functions), together with their quality bit, using the IEC
61850-8-1 GOOSE profile. The IED meets the GOOSE
performance requirements for tripping applications in
substations, as defined by the IEC 61850 standard. The IED
interoperates with other IEC 61850-compliant IEDs, and
systems and simultaneously reports events to five different
clients on the IEC 61850 station bus.
The Denial of Service functions DOSLAN1 and DOSFRNT are
included to limit the inbound network traffic. The
communication can thus never compromise the primary
functionality of the IED.
The event system has a rate limiter to reduce CPU load. The
event channel has a quota of 10 events/second after the initial
30 events/second. If the quota is exceeded the event channel
transmission is blocked until the event changes is below the
quota, no event is lost.
All communication connectors, except for the front port
connector, are placed on integrated communication modules.
The IED is connected to Ethernet-based communication
systems via the fibre-optic multimode LC connector(s)
(100BASE-FX).
The IED supports SNTP and IRIG-B time synchronization
methods with a time-stamping accuracy of ±1 ms.
• Ethernet based: SNTP and DNP3
• With time synchronization wiring: IRIG-B
The IED supports IEC 60870-5-103 time synchronization
methods with a time stamping accuracy of ±5 ms.
Table 1. Supported station communication interfaces and protocols
Protocol Ethernet Serial
100BASE-FX LC Glass fibre (ST connector) EIA-485
IEC 61850–8–1 ● - -
DNP3 ● ● ●
IEC 60870-5-103 - ● ●
● = Supported
Horizontal communication via GOOSE for interlocking
GOOSE communication can be used for exchanging
information between IEDs via the IEC 61850-8-1 station
communication bus. This is typically used for sending
apparatus position indications for interlocking or reservation
signals for 1-of-n control. GOOSE can also be used to
exchange any boolean, integer, double point and analog
measured values between IEDs.
DNP3 protocol
DNP3 (Distributed Network Protocol) is a set of
communications protocols used to communicate data between
components in process automation systems. For a detailed
description of the DNP3 protocol, see the DNP3
Communication protocol manual.
IEC 60870-5-103 communication protocol
IEC 60870-5-103 is an unbalanced (master-slave) protocol for
coded-bit serial communication exchanging information with a
control system, and with a data transfer rate up to 19200 bit/s.
In IEC terminology, a primary station is a master and a
secondary station is a slave. The communication is based on a
point-to-point principle. The master must have software that
can interpret IEC 60870-5-103 communication messages.
IEC 60870-5-103 protocol can be configured to use either the
optical serial or RS485 serial communication interface on the
COM03 or the COM05 communication module. The functions
Operation selection for optical serial OPTICALPROT and
Operation selection for RS485 RS485PROT are used to select
the communication interface.
Generator protection REG650
1MRK 502 050-BEN B
Product version: 1.3
ABB 27
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