AIS spol. s r.o. Measuring and information technology for power engineering

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.

Download this sheet