Transmission Grid Operator

Division of Transmission Lines consists of:

Unit for OHTL maintenance service includes:

• OHTL crew Skopje
• OHTL crew Bitola
• OHTL crew Stip
• OHTL crew Ohrid

Unit for OHTL coridors maintenance
        
This division is responsible for the operating of the power transmission system of Macedonia. This office is in charge of maintaining more than 2.000 km transmission grid operated by AD MEPSO. To accomplish this operation the office has four transmission line crews.  The crews are staffed by experts trained well to maintain the total power grid. Their duties include from regular grid inspections based on the results from the inspections, then follow revisions to the transmission lines on which repair is made and are put in function anything identified as a shortcoming and defect identified during the irregular inspection.

The transmission line crews also intervene during breakdowns and they members are trained to react very shortly and repair the defects that might occur for the reasons of atmospheric influences, overloading of grid or other adverse impacts. Inspections are made twice a year, in spring and autumn. After inspections spring and autumn revisions follow.

The measuring and development service is responsible to check the resistance of grounding of the transmission line towers. This office has a mobile crew measuring the grounding resistance on each tower location, on all transmission lines that MEPSO operates with. After the measuring made it analyzes the measured results and if needed provides for additional performance of grounding to tower locations where the results do not satisfy the prescribed technical standards.

The Division in its composition unites two units:

• Unit for testing the relay protection and secondary connections;
• Unit for analyses and calculations of electricity relay protection;
• Unit for maintenance of equipment for relay protection;

The Division of Relay Protection is in charge of the soundness and operation of relay protection in the power transmission system. Any element in the transmission system: transmission line, power transformer, busbars, energy cable and other equipment must be protected with suitable protection.

 

A sound and selective operation of the relay protection is the top priority for ensuring safety of people and equipment connected with the power system in the Republic of Macedonia, and at the same time for the quality and constant supply to consumers in the system. As the result of this, the division tests the relay protection every year and, if needed, reacts or replaces it with a new one. Tests are made by experts employed in AD MEPSO who have all the necessary certificates and has been trained in training centers at all well-known manufacturers of relay protection and testing equipment worldwide. They operate the most sophisticate equipment and one of the main priorities of the division is to follow-up and applies the latest achievements in the world of this area. For all this it can be concluded that the division actively follows all the latest activities in the field of relay protection, and actively participate in international workshops and trainings.

 

The division is also responsible for selective functioning of the relay protection in the electricity transmission system having the most sophisticated software necessary to make all the accounts and check up of selectivity of the relay protection. In the event of outage in the power system the division actively participate in the analysis of the outage and proposes measures to enable more quality electricity supply to all consumers in the power system as much as possible.

 

The Division of Relay Protection actively participate in the development of the power system of the Republic of North Macedonia including in the construction of all new facilities in the electricity transmission system. It actively participates also in the construction of all international connections with the neighbouring countries and maintains permanent relations and holds meetings with the appropriate authorities working within the framework of TSO in the neighbouring countries.

The Division of rehabilitation is an organizational unit within the division called transmission grid operator (TGO), and its principal function Is to renew the power facilities of TGO.

The Division of rehabilitation unites an electric unit, unit for projects documentations and civil unit.

The transmission grid which is under MEPSO’s management and maintenance integrates more than 50 substations across the country. Out of which 14 are in MEPSO’s ownership, while the rest of them are in joint ownership with the DSO companies.

Department for technical control, maintenance and testing of substations
The activity of the Department for technical control, maintenance and testing of substations is performed by the following Units:

The transmission grid which is under MEPSO’s management and maintenance integrates more than 50 substations across the country. Out of which 14 are in MEPSO’s ownership, while the rest of them are in joint ownership with the DSO companies.

Department for  substations
The activity of the Department for transformer substations is organized to operate via the following Units: