9.7
Date Code 20120126
Instruction Manual
SEL-2032 Communications Processor
Protocols
SEL Fast Message Protocol
The SEL-2032 will automatically send the “Enable Unsolicited Data
Transfer” message (function code 0x20) to the attached SEL IED along with
the rate value. This message instructs the SEL IED to begin sending UW
Messages (synchrophasor data) to the SEL-2032 at the specified rate. If the
attached IED does not support UW message transmission or the specified
message rate, the setting will fail to enable synchrophasor data transmission.
Note that the SEL-421, SEL-451, and SEL-734 devices only support an
SP_RATE of 60 when transmitting synchrophasor data to the SEL-2032. The
SEL-311 series relays and most SEL-351 series relays support all valid
message rates. It is the responsibility of the user to choose a valid UW
message rate (selected by SP_RATE) supported by the attached SEL IED.
Refer to the appropriate SEL IED instruction manual for supported data rates.
Fast Message Synchrophasor Processing
When UW message collection is enabled and the IED supports UW message
transmission, the SEL-2032 will periodically attempt to enable UW message
transmission every five minutes. This ensures that if the connected SEL IED
ever stops sending UW messages (for example, in the event of a power
failure), the SEL-2032 will re-enable them after a maximum interval of five
minutes.
In order to disable UW Message collection, the user must set SP_RATE to
“N” (None). The SEL-2032 will automatically send a “Disable Unsolicited
Data Transfer” message to the attached SEL IED.
When necessary, the SEL-2032 will send a “Disable Unsolicited Data
Transfer” message to the attached SEL IED, disabling UW messages. This
includes during port settings changes, initiation of transparent
communications, reconfiguration, etc. Once the SEL-2032 is able to receive
UW messages, the SEL-2032 will automatically send an “Enable Unsolicited
Data Transfer” message (along with the rate value) to reenable data collection.
The IED must respond to every Enable or Disable message the SEL-2032
sends within 1/2 second. If it does not receive a response, the SEL-2032 will
send the message up to three times more (for a total of four attempts). After
making the fourth attempt, the SEL-2032 will return to processing normal
communications traffic.
Note that the SEL-2032 will process all UW messages from a lower-tier
device whether or not UW messages are enabled or disabled via this new
automatic setting.
Multitiered
SEL-2032
Applications
If you have more than 16 IEDs in your substation, you can collect data with a
multitiered SEL-2032 architecture similar to that shown in
. With
this architecture, the connection between the SEL-2032 and the relays uses the
Fast Message protocol to convey measurements, control messages, and collect
SER information. As with connections to other SEL IEDs, the message and
communication configuration is mostly automated by the auto-configuration
process. You can pass data between the SEL-2032 and the relays (in either
direction) using the “\W” automatic message described in
.
Содержание SEL-2032
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