NanoDomi, one of the leading companies in the photovoltaic systems and renewable energy (RES) sector, in partnership with ANAX TECHNIKI, presents its proposal for outdoor medium-voltage photovoltaic substations.
Outdoor photovoltaic medium-voltage substations are used in cases where a consumer’s power requirements exceed 100 kVA. The same need is also observed in photovoltaic systems, where in recent years the most common PV installations are 400 kW or 500 kW systems, for which information is provided below.
In such a scenario, the investor must build their own substation for connection to the HEDNO (Hellenic Electricity Distribution Network Operator) at medium voltage level.
NanoDomi can supply prefabricated substations for any capacity (e.g. 1 MW), as well as the LV (low-voltage) switchgear according to your specific requirements.
OUR PROPOSAL
General description of an outdoor medium-voltage substation
- The enclosure is specifically designed to house electrical equipment, including a transformer, a medium-voltage switchgear, and low-voltage switchgear panels.
- The roof structure must ensure complete waterproofing of the kiosk. It is installed on an existing concrete base, to which it is anchored using bolts.
- The kiosk features a steel frame that is properly dimensioned to safely withstand all loads during transportation.
- It is externally clad with polyurethane sandwich panels, and the roof is made of trapezoidal polyurethane sandwich panels, ensuring maximum thermal insulation.
- Transport is carried out by lifting from fixed points designed to bear all loads.
- The substation is suitable for outdoor installation on a reinforced concrete base with appropriate infrastructure for cable entry and exit.
- The structure will be delivered complete and ready to receive incoming and outgoing cables, and it will be coated with oven-baked epoxy powder electrostatic paint.
Why choose our proposal?
At NanoDomi, thanks to our extensive experience and deep understanding of the specific requirements in the construction of photovoltaic parks, we include the following in our standard substation solutions:
- A complete standalone Click2Save 3 kVA inverter with an integrated PV regulator and external AC generator input (24/3000/25–50), instead of a 1 kVA UPS (as used by competitors).
- Sunlight 115Ah batteries (Accuforce 115-S) for greater load autonomy in case of power outage, supporting the monitoring and security system of the photovoltaic park.
- In addition, at a low cost, we include and pre-install photovoltaic panels on the industrial roof of the substation so that, from the very first day and before connection to the HEDNO grid, the PV plant can operate security cameras and alarm systems.
Electrical equipment of an outdoor medium-voltage substation
- Medium-voltage switchgear.
- Low-voltage switchgear panel.
- 500 kVA oil-immersed transformer.