Initial Results with Real-Time Testing of Smart-WAMS for Power Oscillation Monitoring

This article illustrates the laboratory based real-time testing of smart wide-area monitoring systems (smart-W AMS). The smart-WAMS approach has already been published by the authors of this paper and it has been proven very effective in wide-area monitoring of power oscillations. Smart-WAmsconsumes the phasor measurement unit (PMU) signal and gives the accurate real-time information about the various critical modes present in the system. The dominant low frequency modes can be tracked in real-time in terms of its frequency and amplitude deviation. The testing is done using real-time simulator, Opal-RT. The two power system networks are considered for testing. The first one is the offline IEEE 39 bus system which is simulated in real-time environment in Opal-RT and the second one is the online Nordic grid system. The procedure and the relevant details involved in the testing are explained and the obtained results are also discussed.