10.29
Date Code 20170927 Instruction Manual SEL-751 Relay
Analyzing Events
High-Impedance Fault (HIF) Event Reporting
The configuration file has the following format:
➤ Relay ID, firmware ID, COMTRADE standard year
➤ Number and type of channels
➤ Channel name units and conversion factors
➤ Digital Relay Word bit names
➤ System frequency
➤ Sample rate and number of samples
➤ Date and time of first data point
➤ Date and time of trigger point
➤ Data file type
➤ Time stamp multiplication factor
.DAT File
The .DAT file follows the COMTRADE binary standard. The format of the
binary data files is sample number, time stamp, data value for each analog
channel, and digital channel status data for each sample in the file. There are
no data separators in the binary file, and the file contains no carriage return/
line feed characters. The sequential position of the data in the binary file
determines the data translation. Refer to the IEEE Standard Common Format
for Transient Data Exchange (COMTRADE) for Power Systems, IEEE
C37.111–1999 for more information. Many software applications can read
binary COMTRADE files, including
ACSELERATOR Analytic Assistant
SEL-5601 Software and
ACSELERATOR QuickSet SEL-5030 Software.
Retrieving COMTRADE Event Files
COMTRADE files are available as read-only files that can be retrieved using
the FILE command and Ymodem file transfer, Ethernet File Transfer Protocol
(FTP), or Manufacturing Messaging Specification (MMS). MMS file transfer
is only available in models that support IEC 61850 and only when IEC 61850
is enabled (E61850 := Y) and MMS file services is enabled (EMMSFS := Y).
See FILE Command on page 7.32, File Transfer Protocol (FTP) and MMS
File Transfer on page 7.13, and MMS on page F.4 for additional information.
High-Impedance Fault (HIF) Event Reporting
High-impedance fault event information is available when the relay supports
HIF detection. The HIF events can be viewed in compressed ASCII or
COMTRADE format. The relay stores event information in nonvolatile
memory. Report setting HIFLER determines the length of the stored event
report. The relay can store approximately 40 minutes of event report data,
corresponding to two stored events at the maximum HIFLER setting of 20
minutes, or approximately 20 stored events at the minimum HIFLER setting
of two minutes. The length of time reserved within the stored event report for
dd/mm/yyyy,hh:mm:ss.ssssss
Trigger Point
BINARY
<time stamp multiplication factor>
Figure 10.10 Sample COMTRADE .CFG Configuration File Data (Sheet 2 of 2)
NOTE: HIF COMTRADE events can
be extracted using the FILE command
(see Section 7: Communications),
Ethernet File Transfer Protocol (FTP),
or the IEC-61850 Manufacturing
Messaging Specification (MMS). To
transfer files using MMS, set EMMSFS
to Y.
To Next Page
Loading...
