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DETECTION OF THE ISLAND OPERATION
Features:
- On-line detection of separation of network part.
- On-line monitorig of behavior of the separated network parts (islands).
- Support of the reconnection of separated part back to the network.
- On-line monitoring of frequencies and angle differences.
- Support of the synchronization process.
- Continuous measurement of voltage and current synchrophasors in mupltiple network nodes.
Example - island creation and reconnection:

Application benefits:
- Supervision of network integrity.
- Generation of event in aproaching the stability limits.
- Monitoring of behavior of separated network parts.
- Solution support in problem situations.
WAMS system support for detection of island operation:

Island creation and reconnection:

Terminal – Phasor Measurement Unit (PMU) specification:
- Stand alone unit with in-place compute functions, storage option and remote parameterization.
- Fast parallel measurements — typically 10 kHz.
- Various measurement inputs for range of instrument transformers.
- 8 inputs per terminal.
- GPS time synchronization - phase precision < 0.1°, voltage and currents precisions < 1%.
- Wide range of communication options on physical layer (Ethernet, RS-232, GSM/GPRS) and standard protocols (e.g. IEC-68570-5-101/103/104, IEEEC37.118) implemented.
- Conforms to EMC standards for industrial environment.
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