PHOTOVOLTAIC SYSTEM IN JORDAN

CLIENT: NUBIAN FOR RENEWABLE ENERGY PSC – Group company ENERRAY S.r.l.
PERFORMANCE CARRIED OUT: feasibility, preliminary draft, final, executive, structural, plant design.
START/END OF WORK: 2015-2016

PROJECT DESCRIPTION

The project involved a 23.1 Mwp photovoltaic plant in the Ma’an area of Jordan.
The photovoltaic system is connected to the national electricity company (NEPCO) through an existing substation, located in the project area. The entire area has been developed for the construction of different photovoltaic systems with different powers, all connected to the same substation. The PV system has been designed to allow full power in all temperature and solar radiation conditions. It is composed of 73,320 polycrystalline modules (315 Wp of nominal power), placed on fixed structures facing south at an angle of 18° from the horizontal. The distribution of the panels on the area has been designed to minimize the losses caused by shading considering the minimum inclination of the sun. The photovoltaic system is essentially composed of:

• 73320 modules, divided into 12 subfields, mounted on a galvanized steel structure. The configuration has provided 2 strings for each structure which is therefore composed of 2 20 modules with vertical positioning. This solution minimizes shading losses and ensures a rational coverage of the area. To ensure sufficient power for each inverter, 150-154 strings were provided for each subfield. The photovoltaic generators are grouped in 168 string frames, placed on the back of the structures, under the modules
• 12 medium voltage stations, each equipped with a transformer
• main control room, equipped with medium voltage switchboards for input/output lines and transformers
• auxiliary unit, equipped with auxiliary transformer, low voltage and UPS (UPS)
• security room with anti-theft alarm and surveillance system, 2 warehouses for spare parts and 1 office module
• medium voltage transformer – Statcom, with the function of providing the reactive power needed to keep the reference voltage as close as possible to the pre-set value
• 4 weather stations, which measure: global radiation, radiation on the module plane, the temperature of the photovoltaic cell, the atmospheric pressure, the temperature and humidity of the air, the direction and speed of the wind
• a SCADA (Supervisory Control and Data Acquisition) system, that is a complete data monitoring system and devices present on the plant such as inverters, string panels, energy meters, weather stations, etc.