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Functions grouped in
61850
Monitor
Control
Measurement
Time
Synchronization
Figure 11.3-2 shows Physical Model, which is equivalent to the IEC 61850 Model. The Physical
Model illustrates that both the IED and its functions are communicating with the SAS using
the Ethernet. The equivalent IEC 61850 Model represents communication at LNs in both the
PD using different Communication services, which we shall discuss in Chapter 11.3.2.
Monitoring
x
Control
×
Measuring
Physical Model
IEC 61850 Model
CB
CT
VT
Binary
Input
Figure 11.3-2 Example of Physical model and its equivalent IEC 61850 model
Table 11.3-2 Function groups in 61850
Examples of IED applications
to provide protection/control
functions for the power
system
Overvoltage relay (OV)
Overcurrent relay (OC)
Trip circuit (TRC)
Generic functions
DPOS etc.
Measurement
Harmonics
Simple Network Time
Protocol
Over current
CB Open/Close
CB Status
Under voltage
Monitoring
Control / Monitoring
Protection function
"Logical Node"
Physical Device
LN
LPHD
LN
XCBR
LN
CSWI
LN
PTOC
LN
PTUV
LN
MHAI
LN
SIMG
Logical
node
defined in
61850
PTOV
PTOC
XCBR
SIMG
CSWI
MMXU
MHAI
NA
IED
relay
Ethernet
relay
"Communication Service"
GOOSE
Enhanced-security Control
Buffered Report
LN
GOOSE
PTRC
Buffered Report
Unbuffered Report
GOOSE
- 878 -
6F2T0207 (0.01)
Communication methods
serviced in 61850
Buffered Report
Buffered Report
GOOSE
GOOSE
Enhanced-security Control
Unbuffered Report
Unbuffered Report
SNTP
SAS
Server / Work
station
Physical Device
LN
CALH
LN
IHMI
LN
IARC
GRE200 (5,6)
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