Hitachi Relion 670 Series Applications Manual page 372

Section 18
Station communication
Function block type
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 184:
18.3 IEC/UCA 61850-9-2LE communication protocol
18.3.1 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.
366
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
Analog value
Single point
Switch status
AND
out Input1
Input2 Noput
Input3
Input4
1MRK506375-UEN Rev. N
GUID-808177B7-02CA-40DF-B41B-8B580E38478B v1
out
Ext_Res_OK_To_Operate
IEC16000082=1=en.vsd
Railway application RER670
Application manual
SEMOD172279 v3
SEMOD166571-1 v2
SEMOD166590-5 v7