Fig.1. Croatian TSO PMU Ring

As a part of the SIPS Project (System Integrity Protection Schemes) conducted by the University of Rijeka
for the Croatian Transmission System Operator, six upgraded STER PMU
devices were installed in Zagreb in
September and November 2011. Devices are configured to monitor a ring of 6 transformer stations and power plants,
and will be used to solve the following problems:

• Near real-time system dynamics monitoring
• Evaluation of model dynamics
• Baselining, tuning and troubleshooting

Since the previous CARWAMS grid project, various new functionalities have been implemented in both STER PMU devices
and the WAMSTER system:

• 32GB SD memory cards sufficient for storing more than 4 months of data
• Higher resolution default reporting (10fps, with 50fps on demand)
• Custom event triggering and reporting
• STER PMU Ethernet functionality for continuous full-resolution reporting scenarios