Terna UPDM - Peripheral Defense and Monitoring Unit

To ensure the safety of the National Electric System and prevent the spread of disturbances in the Transmission system with severe repercussions on the entire national network, Terna has defined a Defense Plan. The Defense Plan includes all the control actions arranged by Terna itself and carried out through individual systems or devices, aimed at maintaining or returning the electrical system to a normal condition.

Within the production plants served by Terna's defense system, the Peripheral Defense and Monitoring Unit (UPDM) is a system designed to acquire real-time measurements and other information from controlled processes coming from local protection, command, control, and supervision systems and to implement disconnection and production modulation commands, following the reception of a message from other peripheral telecontrol devices or from Terna's central defense system.

To ensure suitable response times, data exchange between the central defense system and other devices in the field occurs via a dedicated telecommunication network, distributed to cover the entire national territory. The protocol used is based on the IEC 60807-5-104 standard.

Thytronic's proposal is an UPDM device certified in class A+ according to the most recent technical specification of Terna, ensuring a time of less than 10ms for the issuance of the message and for the simultaneous execution of all prepared commands.

This class allows the use of Thytronic's UPDM device in all production facilities, such as generation plants, wind, photovoltaic, and hydroelectric plants for which Terna's defined defense system can be applied.