First South East European Regional CIGRÉ Conference - Portoroz, Slovenia, 7—8 June 2016 SEERC

Overhead transmission line monitoring system in Croatian power grid

KLOBAS, Z., LOVRENČIČ, V., RUBEŠA, R., VALENTIĆ, V., JARC, M.

P11

THE 110 kV OVERHEAD POWER LINE CRIKVENICA – VRATARUŠA

THE OVERHEAD TRANSMISSION LINE MONITORING SYSTEM (OTLM)

OTLM is a system solution for monitoring andrating your existing and new OHLs based on real-time monitoring of conductor temperature, sag,load, and weather conditions.

The line was created after interpolation of a windfarm (WF) Vrataruša of 42MW in the existing OHLCrikvenica – Senj at the beginning of 2010. Theoperation of WF Vrataruša at full power, in somecases, may require a change in network topology.The problem of safe energy transfer was attemptedto be solved by using the Overhead TransmissionLine Monitoring (OTLM) system.

OTLM System benefits: ampacity, directmeasurement of temperature, current and sag,lightweight, easy installation, installation of theOTLM on any diameter of OHL, user friendlysoftware, connection to SCADA or other systemwith standardized IEC protocol, GPS position, two-stage alarm sending interval, triggered bytemperature of the conductor (T> and T >>),multiple communication protocol and data logging.

Putting the transmission network in the service ofthe electricity market causes a large energy flow incertain transmission directions. The key technicalquestion is how much time will transmissionnetwork tolerate this situation without damage. Inthis case, for the system operator, very helpfulinformation is the actual thermal loading of theconductor in normal and emergency state for re-dispatching energy. This can be achieved withOTLM system.