The Parnaíba Photovoltaic Plant, which is awaiting connection to the distribution system and is classified as a GDI (Generation Differential), brings innovation that connects clean energy generation with the modernization of local infrastructure.
This is a project built next to the Mayor Dr. João Silva Filho Airport in Parnaíba-PI, and it is in line with the local development process and the state's PLAC (Climate Action Plan), which aims to achieve 100% renewable energy by 2050.
In line with this evolutionary process, the Parnaíba Photovoltaic Plant has begun operations, bringing innovation that connects clean energy generation with the modernization of local infrastructure.
The power plant is already part of the region's new energy infrastructure, with an installed capacity of 3.700 kW in AC (alternating current) and a nominal capacity of 5.160 kWp in DC (direct current).
The project is connected to the 13,8 kV power grid and occupies an area with a perimeter of 1.042 meters.
The system consists of 8.820 bifacial photovoltaic modules of 585 Wp, model OSDA ODA585-36V-MHD, distributed across 83 structural panels.
Each string is made up of 28 modules, totaling 315 strings in the arrangement. The tables have a variable configuration of 4, 2, or 1 string, with a 10° tilt angle and a spacing between axes of 7,5 meters.
Energy conversion is performed by 15 GoodWe inverters, comprising 13 units of the GW250K-HT model and 2 units of the GW225K-HT model, totaling 3.700 kW of installed inverter power.
The equipment is distributed across two power centers, with 7 and 8 inverters per unit, and operates with 19, 21, or 22 strings per inverter, depending on the plant's electrical configuration.
The plant is located with easy access via the road corridor of the Mayor Dr. João Silva Filho Airport, which optimizes O&M (Operation and Maintenance) logistics.
Electrical structure, connection and operational safety
The generated energy is stepped up from 800 V to 13,8 kV using 2.000 kVA three-phase dry-type transformers, ensuring safe integration with the utility grid.
DC cables comply with ABNT NBR 16612 standards and are installed in HDPE conduits at a depth of 0,70 meters, with a maximum occupancy of four strings per conduit.
Low-voltage AC cables use 240 mm² aluminum conductors with XLPE insulation, while medium-voltage cables were designed with 50 mm² and 95 mm² cables, according to the utility company's standards.
The grounding system was designed based on SEV (soil resistivity test), according to ABNT NBR 7117, using 50 mm² copper-clad steel and bare copper cables, in accordance with NBR 16254.
The grounding system included modules, electrical substations, fences, cabins, and metal structures, ensuring equipotential bonding and protection against lightning strikes.
The project also incorporates a complete solarimetric station, equipped with pyranometers for measuring GHI, POA and albedo, as well as an anemometer, anemoscope, thermohygrometer, rain gauge and temperature sensor for the modules, used in monitoring plant performance.
For property and operational security, a CCTV system was implemented with 35 bullet-type cameras and two speed dome-type cameras, with remote monitoring and intelligent image analysis.
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