1. SendDataUDP[x] – Enable / disable UDP data stream
2. ProtocolOnUDP[x] – Send IEEE1344 or C37.118 on UDP
3. PMUReportUDP[x] – Instance number of PMUREPORT function block that must
send data on this UDP stream (UDP client group[x])
4. UDPDestAddres[x] – UDP destination address for UDP client group[x] (unicast /
multicast address range)
5. UDPDestPort[x] – UDP destination port number for UDP client group[x]
6. TCPportUDPdataCtrl[x] – TCP port to control of data sent over UDP client
group[x], i.e. to receive commands and send configuration frames
7. SendCfgOnUDP[x] – Send configuration frame 2 (CFG-2) on UDP for client
group[x]
It is possible to turn off/on the UDP data communication either by setting the parameter
SendDataUDP[x] to Disable/Enable locally in the PMU or by sending a C37.118 or
IEEE1344 command frame (RTDOFF/RTDON) remotely from the client to the PMU as
defined in IEEE 1344/C37.118 standard.
However, such a remote control to stop the streams from the client is only possible when
the parameter SendDataUDP[x] is set to SetByProtocol. The command RTDOFF/
RTDON sent by the client is stored in the IED, i.e. if the IED is rebooted for some reason,
the state of the stream will remain the same.
If the parameter SendDataUDP[x] is set toEnable the RTDOFF/RTDON commands
received from the clients are ignored in the IED.
It is recommended not to set the parameter SendDataUDP[x] to SetByProtocol in case of
a multicast. This is because if one of the clients sends the RTDOFF command, all the
clients will stop receiving the frames.
The UDP implementation in the IED is a UDP_TCP. This means that by default, only the
data frames are sent out on UDP stream and the header frame, configuration frame and
command frame are sent over TCP. This makes the communication more reliable
especially since commands are sent over TCP which performs request/acknowledgment
exchange to ensure that no data (command in this case) is lost.
However, by setting the parameter SendCfgOnUDP[x] to Enable, the configuration frame
2 (CFG-2) of IEEEC37.118 data stream is cyclically sent on the corresponding UDP
stream (UDP client group[x]) once per minute. This is useful in case of multicast UDP data
stream when a lot of PMU clients are receiving the same UDP stream from the same UDP
group (UDP client group[x]).
As shown in Figure
33, there are maximum 2 instances of PMUREPORT function blocks
available in the IED. Each UDP client group[x] can only connect to one of the
PMUREPORT instances at the same time. This is defined in the PMU by the parameter
PMUReportUDP[x] which is used to define the instance number of PMUREPORT
function block that must send data on this UDP stream (UDP client group[x]).
Section 6 1MRK 506 369-UUS -
Wide area measurement system
112 Line distance protection REL670 2.2 ANSI
Application manual
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