Assignor:
El Izgrazhdane-Bulgaria EAD
Location:
Municipaliry of Tundzha, Region of Yambol
Date of assignment: October, 2023 / Completion date: May, 2024
Project includes works for construction of a 33/110kV step-up substation, and a 110kV nodal substation, through which the PV plant is connected to the power grid.
Completed activities:
33/110kV Step-up Substation
- Installation of primary switching equipment, as following: 63/80MVA three-phase power transformer, 110kV three-pole SF6 module, surge arresters, support insulators, single-pole earthing switch, active resistance, 100kVA transformer for auxiliary power supply, 10 pcs. 33kV switchgear modules
- Supply, installation and connection of power and control cables.
- Supply and installation of cable racks.
- Supply of ACO-500 type conductor, making, installation and adjustment of single-phase connections between the facilities, incl. installation of terminal fittings.
- Construction of earthing installation
- Installation of secondary switching equipment, as following: manufacture, supply and installation of control cabinets, relay panels, RTU and communications cabinet, back-up power supply cabinet, inverter, auxiliary control cabinets, central signaling cabinet, electro-metering cabinet
- Programming, testing and commissioning of SCADA system for substation management and control.
- Control measurements and tests, commissioning of all the installed equipment.
110kV nodal substation
- Installation of the following primary switching equipment in 110kV switchyard: three-phase disconnectors, three-phase power switches, current transformers, voltage transformers, surge arresters, support insulators.
- Installation of tubular busbar systems.
- Supply and installation of ACO-500 type conductor and three-phase hanging deviations.
- Supply, installation and connection of power and control cables.
- Supply and installation of cable racks.
- Installation of secondary switching equipment, as following: manufacture, supply and installation of outdoor control panels, backup power supply panel, remote control and remote signaling cabinets, rectifier cabinet, AC and DC auxiliary control cabinets, central signaling cabinet, electro-metering cabinets.
- Control measurements and tests, commissioning of all the installed equipment.
