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Running Multiple PMUSimulators on same Computer
I tried running two PMUSimulators at the same time on the same Computer. With respect to processing power, there is no trouble. I have run 20 simultaneous instances of PMUSimulator with no processing trouble. However, when i used Wireshark (free network
packet sniffer software) to determine when each packet actually left the computer, I have some problems. Ideally, two packets with the same timestamp should leave the computer at nearly the same time. However, the PMUSimulators seem to be operating independently
of each other. For example one PMU will send time FSOC=0 at one time, and the other PMU will send FSOC=0, 5 milliseconds later. The delay between each packet changes throughout time. When I try to autocorrect the frame rate the problem becomes even worse.
Real PMU's typically only have 1 or 2 outputs. The PMUSimulator is certainly capable of having multiple outputs but data frames need to leave the computer at the same time. I have attached the Wireshark file that I captured. I had two identical PMUSimulator
config files running. One was using UDP port 4567, and the other was using UDP port 4568. The port numbers are needed to distinguish between the two PMUSimulators. Note: Wireshark is extremely useful because you can decode the packets as Synchrophasors.
I'm not sure exactly how the packets are compiled, but it is necessary to send similar packets at the same time in order to simulate the interoperability of real PMU's. There should be a way to generate the data frame with a particular timestamp and send it
at the same time as another instance of PMUSimulator. Any suggestions?