ABB REG670 Applications Manual page 112

Section 6
Wide area measurement system
106
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 Off/On 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 toOn 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 On, 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 38, 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]).
The data streams in the IED can be sent as unicast or as multicast. The user-defined IP
address set in the parameter UDPDestAddress[x] for each UDP stream defines if it is
a Unicast or Multicast. The address range 224.0.0.0 to 239.255.255.255 (Class D IP
addresses) is treated as multicast. Any other IP address outside this range is treated as
unicast and the UDP data will be only sent to that specific unicast IP address. In
addition to UDPDestAddress[x] parameter, UDPDestPort[x] parameter is used to
define the UDP destination port number for UDP client group[x].
Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062
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