Arootin Matavoosian

SELTA has designed electrical panels for digitalizing the controlling and protecting units of high-voltage substations of TERNA. So, they digitalized the control of breakers and sectionalizers by the PLCs designed by them and MOXA SCADA. I worked in both SAS2021 and ASAT3 projects and participated in the following tasks:

• Configuration of PLCs designed by SELTA: Creating ICD and SCD files according to the IEC 61850 protocol to facilitate the control, monitoring and protection of lines, transformers, and busbars of high voltage substations of TERNA.
• Configuration of Siemens SIPROTEC 7SA87 and 7SL87 units: Configuring the distance and differential protections by DIGSI 4 software.
• Configuration of MOXA switches used for communication of the IEDs and the SCADA by fiber optics and ethernet cables.
• Troubleshooting in automation, configuration and wiring of the electrical panels by testing all the functions of the automation installed in the CPU like opening and closing of breakers and sectionalizers and checking if the interlocks between them are working properly, testing rapid and slow re-closure of the breaker, giving artificial fault values to the panel to check if the protection unit opens the breaker according to its automation, checking if all the alarms and signals are arriving to the panel responsible for that organ and also SCADA.
• Testing the functionality of the SCADA system used for the substations of TERNA: Testing if all the digital inputs, outputs and the reports are arriving to and are sent by SCADA.

I conducted a project aimed at enhancing quality of service parameters (DIL and NILB parameters) in power distribution networks. The project centered on evaluating the effects of 'Always On' communication technology (4G routers) and logic-based SHA automation in improving service quality.
Throughout this experience, I gained familiarity with:

• Electronic devices used in MV/LV substations for telecontrolling breakers and measuring grid parameters, feeder sectionalizers, medium voltage breakers, and protection relays like 67NS1 residual directional overcurrent relays and 51 overcurrent relays and earthing systems in HV/MV substations.
• Medium voltage line automations such as FRG and FNC time-based automations and SHA logic-based automation.