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Development of a 10 KW stand-alone small size wind photovoltaic energy generating system


The technical objective of this project is to demonstrate that the wind and solar energy of a site can be exploited for small-scale electric energy generation by means of a "stand-alone" integrated generating system using a wind-turbine driven generator, a PV array and a single dc-to-dc power electronic interface between the generating units and the utility circuit.
Innovative components will be designed and tested :
* a gearless PM axial-flux wind generator
* a 10 kW double-input single output d.c.-to-d.c. power electronic interface.
A 10 kW rated power pilot plant (5 kW wind power and 5 kW PV power) will be designed and built in the south of Italy.

In one sense the wind and solar energy have complementary characteristics. Sunny days are generally characterized by a poor wind activity, whereas wind speeds above the average are observed often during cloudy days and the night. The use of both the solar and wind resources of a site to generate power results thereby is an improvement of the average availability of energy, and in a significant number of cases the needs of electricity users located in rural areas can be met by means of small-size power plants which use wind and photovoltaic energy together with a limited amount of energy storage. Hence, such an approach suggests the development of integrated generating systems, which consist basically of a wind generator and a photovoltaic array operating in the same power circuit. Both these generating units feed a power conditioner, which is devoted to control suitably the power flow and supply the battery system.

This project uses an innovative configuration for such stand-alone power plants : a wind-turbine-driven axial-flux PM generator and a photovoltaic array as power generating units. The wind generator supplies a three-phase diode rectifier, and altogether this system produces a variable d.c. output power which depends on the wind speed and the turbine rotor speed. The photovoltaic array is made of a large number of solar cells connected in series and parallel, and this d.c. generator delivers a variable output power depending on the sunlight intensity and the cell temperature. Both generators supply a double-input single-output power electronics interface, which connects the generating units to the utility circuit and operates in order to achieve the best exploitation of the two renewable sources.

Funding Scheme

CSC - Cost-sharing contracts


Wind Energy System Taranto SpA
Via Archimede
74100 Taranto

Participants (4)

Anit Srl
Via Pacinotti 20
16151 Genova
United Kingdom
Sciences Site
DH1 3LE Durham
United Kingdom
Sackville Street
M60 1QD Manchester
Università degli Studi di Roma La Sapienza
Via Eudossiana 18
00184 Roma