A 46 MWp (62 MWp in the 2nd phase) single-axis tracking system centralised photovoltaic (PV) plant in the Portuguese region of Alentejo (Moura municipality, Amareleja parish), promoted by the local municipality and Acciona Energia (Spain), is expected to be completed by the end of 2008.
The plant will have the highest power so far installed in the world with this technology. The installation of 46 MWp power represents an investment of approximately 250 million euros.
- Area occupied by power station: 130 ha (total area = 250 ha)
- Installed rated power: 62 MWp (46 MW- 1st phase / 62 MW - 2st phase)
- Annual electricity generation: 90 GWh (equivalent to the consumption of 30, 000 Portuguese homes)
- Power transformers: 22
- Inverters: 214
- CO2 avoided: it will prevent the emission of 86,500 tons per year of CO2 from coal-fired power stations
- Investment - ~ 250 million euros
- Conclusion -1st phase: 2008; Conclusion -2st phase: 2010
A new land use - the sun as a resource
Aerial view of Amareleja, Google Earth
The total area in the parish of Amareleja, near the border with Spain, comprehends more than 250 hectares of land, the vast majority without any agricultural or forestry aptitude. The occupation of this space for the installation of a power plant represents the allocation of an economic function to a territory that was excluded from the local economy.
Sum of global annual irradiation, focusing on a photovoltaic module with optimal orientation for midday.
1,650 kWh / KWp
Sum of annual photovoltaic energy generated by 1 KWp with a performance of 0.75
Orography: adequate throughout the mainland and particularly in Alentejo region
Sun exposure: optimal angles - 33 to 34 degrees
Some engineering features
The first phase of work will include Acciona’s single-axis Buskil trackers fitted with modules and also modules on fixed steel structures. The produced electricity will be transformed to 60 kV for evacuation to the grid at Alqueva. The project includes a control centre of the power plant, which will have an area for educational visits related to renewable energies.
807 / 1713 = 2520 units (total 1st phase)
2520 solar trackers Buskil ( Acciona Solar technology) on 141 m2 (13 m length and 10.8 m high)
Reserved area of 848 m2 per structure
Oriented at the 45 ° fixed inclination and capable of 240 º East-West rotation movement following the sun across the sky.
Movements determined by coordinates previously entered
104 polycrystalline silicon modules in each solar tracker (total = 262,080 PV modules)
48 cells (in serie) / each module;
Voltage: 23V at the point of maximum power / 29 V open circuit;
Electric current I: 7.4 A in the point of max. power / 8.1 A in short-circuit;
170 and 180 Wp capacity
Polycrystalline silicon modules, which consist of multicristaline silicon cells covered by an antireflective layer
Lifetime: more than 25 years
In September 2006, the Spanish company Acciona, leader in the renewable energies sector, has acquired all the stocks of the owner of the installation rights (Amper-Central Solar SA) after a long process of consultation and negotiation with several companies and entities. Earlier, the Municipality of Moura had 88% of the capital, Renatura 10% and Comoiprel the remaining 2%. According to the President of the Municipal Chamber of Moura, it was essential to find a partner with the financial capacity to develop the project.
At the time, the municipality stated that the aim of the contract was the acquisition of the entire social capital of Amper, allowing the construction of the Central Solar of Moura with the initial installation (up to 2008) of 40 to 45 MWp and with the possibility of installation (until 2010) for more than 20 MWp. It also enabled the installation of a PV module assembly factory in Moura, as well a Fund of three million euros for the development of research projects related to renewable energies.
Indeed, single municipalities usually don't have sufficient financial capacity to realize big local projects like this one. To achieve this investment, the municipality had to sell its capital shares. As intermunicipal cooperation hasn’t worked in these cases, we may wonder whether the implementation of the administrative region of Alentejo might be a strong factor for maintaining environmental investments, partially or totally, in the hands of the region. The challenge will be to maximize the benefits (social-economical-environmental) of local populations, not the profits of global corporations .
In the next article we will describe the Moura Project on other main “tracks”: Moura Solar Factory (MFS), Moura Technological Park and the Micro-generation program - in the context of the Regional Development strategy.