ABB REB670 Series - IEC;UCA 61850-9-2 LE communication protocol; Introduction

Function block type Data Type
GOOSEINTRCV Integer
GOOSEMVRCV Analog value
GOOSESPRCV Single point
GOOSEXLNRCV Switch status
Application
GUID-808177B7-02CA-40DF-B41B-8B580E38478B v1
The GOOSE receive function blocks are used to receive subscribed data from the GOOSE
protocol. The validity of the data value is exposed as outputs of the function block as well as
the validity of the communication. It is recommended to use these outputs to ensure that only
valid data is handled on the subscriber IED. An example could be to control the external
reservation before operating on a bay. In the figure below, the GOOSESPRCV is used to receive
the status of the bay reservation. The validity of the received data is used in additional logic to
guarantee that the value has good quality before operation on that bay.
GOOSES PRCV
Block Spout
DataValid
CommValid
Test
AND
AND
Input1 out
Input2 Noput
Input3
Input4
Input1 out
Input2 Noput
Input3
Input4
Ext_Res_OK_To_Operate
IEC16 000082=1=en.vsd
IEC16000082 V1 EN-US
Figure 209: GOOSESPRCV and AND function blocks - checking the validity of the received
data
17.3 IEC/UCA 61850-9-2LE communication protocol
SEMOD172279 v3
17.3.1 Introduction
SEMOD166571-1 v2
SEMOD166590-5 v6
Every IED can be provided with communication interfaces enabling it to connect to the
process buses in order to get data from analog data acquisition units close to the process
(primary apparatus), commonly known as Merging Units (MU). The protocol used in this case is
the IEC/UCA 61850-9-2LE communication protocol.
The IEC/UCA 61850-9-2LE standard does not specify the quality of the sampled values. Thus,
the accuracy of the current and voltage inputs to the merging unit and the inaccuracy added
by the merging unit must be coordinated with the requirement for the actual type of
protection function.
Factors influencing the accuracy of the sampled values from the merging unit are, for example,
anti aliasing filters, frequency range, step response, truncating, A/D conversion inaccuracy,
time tagging accuracy etc.
In principle, the accuracy of the current and voltage transformers, together with the merging
unit, will have the same quality as the direct input of currents and voltages.
The process bus physical layout can be arranged in several ways, described in Annex B of the
standard, depending on what are the needs for sampled data in a substation.
Section 17 1MRK 505 370-UEN D
Station communication
396 Busbar protection REB670
Application manual