Iec/Uca 61850-9-2Le Communication Protocol; Introduction - Hitachi Relion 670 Series Applications Manual

Section 19
Station communication
Function block type
GOOSEBINRCV
GOOSEINTLKRCV
GOOSEDPRCV
GOOSEINTRCV
GOOSEMVRCV
GOOSESPRCV
GOOSEXLNRCV
Application
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.
GOOSESPRCV
Block
DataValid
CommValid
IEC16000082 V1 EN-US
Figure 113:
19.3

IEC/UCA 61850-9-2LE communication protocol

19.3.1

Introduction

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.
278
AND
Spout Input1
Input2 Noput
Input3
Test Input4
GOOSESPRCV and AND function blocks - checking the validity of the received data
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Data Type
16 single point
2 single points
16 double points
Double point
Integer
Analog value
Single point
Switch status
AND
out Input1 out
Input2 Noput
Input3
Input4
1MRK511407-UUS Rev. N
GUID-808177B7-02CA-40DF-B41B-8B580E38478B v1
Ext_Res_OK_To_Operate
IEC16000082=1=en.vsd
SEMOD172279 v3
SEMOD166571-1 v2
SEMOD166590-5 v7
Phasor measurement unit RES670
Application manual