Power System Operator

THE UNIT FOR TRANSMISSION SYSTEM CONTROL performs the following activities:

• Collection and archiving of data necessary to plan and analyze activities of the power system, preparation of reports for power system operation;
• frequency regulation and capacity exchange (use of secondary regulation, activating the tertiary regulation, activating the reserve power in emergency cases in supplying the consumers with electricity), and regulation of voltage;
• Following-up the power control (frequency, error in regulation area, voltage, flows of active and reactive energy);
• Organization of repairs and maintenance activities for the transmission grid (approval of intervention activities, opening and closing operating licenses, manipulations for change of switching condition with elements from the transmission grid;
• Putting into operation of newly constructed or reconstructed power facilities directly connected to transmission grid operated by MEPSO;
• Operating activities: modification of daily operating plans of power system, modification of plan of activating the generating units, re-dispatching, analysis of safety at operation of power system in compliance with “N-1” criterion;
• undertaking measures in case of disturbance to re-establish normal operating conditions of power system;
• Defining priorities in carrying out activities in the transmission grid;
• Analysis of safety of transmission system with regard to the proposed plan to activate the generating capacities.

THE UNIT FOR OPERATIONAL PLANNING performs the following activities:

• Preparation of final daily diagram of electricity generation and consumption in the Republic of North Macedonia;
• Preparation of daily plans related to cross border exchange;
• Coordination with СММ unit;
• Security analysis of the transmission grid of the proposed plan to activate the production capacities and exchange (acceptance and analysis of the proposed plan and confirmation of the final daily diagram with regard to electricity production and consumption);
• Coordination of repair activities and/or preparation of a plan to disconnect the transmission and generating elements from the transmission grid, on annual, monthly, and daily bases;
• Approval of planning requirement to disconnect the transmission capacities;
• Calculations of congestions in the transmission grid for the next day (DACF calculation), respectively in UCTE and CIM format, drawing up and exchange of DACF models with the neighboring system operators (TSO);
• Development and exchange of D2CF respectively in UCTE and CIM format, models with neighboring System Operators;
• Preparation and development of annual models in G-1, respectively in UCTE and CIM format;
• Calculation of the cross border capacities (NTC) on annual and monthly level;
• Calculation of cross border exchange according to ITC methodology;
• Optimization of power system operation;
• Short-term, medium-term, and long-term planning of the power system;

THE UNIT FOR ORGANIZATION AND MANAGEMENT OF THE BALANCING ENERGY MARKET performs the following activities:

• Concluding Agreements for the transmission of EE;
• Preparation of monthly reports for the operation of the electrical power transmission system in accordance with the Law of Energy;
• Registration of the participants in the electricity market for participation in the auctions for allocation of cross-border transmission capacities;
• Planning and procurement of system services;
• Concluding of Agreements for Balance Service Providers;
• Concluding of Agreements with Balance Responsible Parties (BRP);
• Keeping a BRP and balance groups Registry;
• Calculation of the cost of settlement of deviations and activated balancing energy;
• Planning, procurement and delivery of EE for compensation of unwanted deviations in the control area in accordance with ENTSO-E regulation;
• Concluding Agreements for purchase and sale of EE to cover unwanted deviations in the transmission network;
• Planning and procurement of EE to cover electricity losses in the transmission network;
• Concluding Electricity Supply Agreements to cover losses in the transmission network with the most favorable bidders;

The Unit for SCADA/EMS is in charge of functioning of the computing configuration of the Energy Management System and/or a Technical Power System Control in the Republic of Macedonia. The computing configuration consists of hardware server platform SUN and operating and applicative software SIEMENS SINAUT Spectrum. In the domain of the activities of this unit are also the computing systems for remote monitoring and power facilities control – electricity transmission sub-stations 110/x and 400/110 kV. Within the division also functions the Automatic Meter Reading System installed in the facilities of  MEPSO and in the sub-stations separated between ELEM and EVN Macedonia.

The Unit for AMR/MDM:  The primary role of the AMR / MDM Unit (Automated Meter Reading / Meter Data Management) is to accredit data from measuring devices (Load profiles, Billing data, data Loss…), store data in a database, as well as their processing and distribution. The unit works in accordance with the development of network operations and planning and contributes to obtaining accurate load models, as well as better service to users with daily distribution of metering data. The AMR / MDM Unit also develops specific requirements related to the efficiency and effectiveness of consumption for normal and smooth operation of the EE system’s processes.

The Unit for SACS (System Automation Control Systems) is in charge of the systems for monitoring and management of power facilities - power transmission substations 110 / x and 400 / 110KV. SACS systems enable the acquisition of disassembled equipment statuses, analog measurements, alarms, and real-time disassembly equipment command, locally from the TS itself and remotely from the NDC. In that way, the observability of Macedonia’s power grid, and the efficiency, reliability and confidentiality in the management of Macedonia’s power system is increased.