Wind & Sun design and install a 'Windy Boy' grid connected wind and PV system at a horticultural college.
The system is installed at Park Lane Horticultural College near Leeds.
- Module type: BP Solar BP275 (10 x 75Wp)
- Inverter 1 x GCI-1000 (0.7kW)
- Wind turbine: Proven WT2500 (2.5kW)
- Inverter: 1 x SMA WWR-2500 (2.5kW)
The 750Wp Photovoltaic Array consists of an array of 10 BP Solar 275F monocrystalline PV modules connected in series. The PV modules are each mounted on a Console plastic bin specially designed for flat roof mounting. Concrete ballast is placed in the bin for stability. The 2.5kW Wind Turbine has a rotor diameter of 3.5m and is mounted on an 6.5m self-supporting tower.
The output of the PV array feeds a SMA Sunny Boy SWR-700 inverter. The wind turbine produces power at a voltage of ~ 250VDC which is fed to a WWR-2500 Windy Boy inverter. This inverter was developed by Wind & Sun with SMA to suit the operating characteristics of the wind turbine. The inverters convert the generated DC power directly into 230 Vac.
The AC outputs are then paralleled together, synchronise with the grid supply and supply power to the college's load circuits or export power to the grid as appropriate.
Each inverter contains protection circuitry to shut down the system in the event of grid failure or variation of grid power quality outside statutory limits.
A Sunny Control unit is included for displaying output and recording performance data. Developing witness tests for commissioning with Yorkshire Electricity.
Windy Boy & Sunny Boy Inverters
First developed in Germany for use with PV systems, Wind & Sun introduced the first of these inverters to the UK several years ago, see West Wales Eco Centre. Since then ‘G77’ type approval and testing has been developed with and adopted by the UK regional electricity companies to simplify connection procedures for grid connection of photovoltaic systems.
The ‘Windy Boy’ inverter used here with the wind turbine is a new development by Wind and Sun (based on experiences at the York Eco-Centre) adapting this technology for use with wind power. A commissioning procedure was developed by Wind & Sun with Yorkshire Electricity to address the concerns of their engineers and allow them to accept the wind turbine connection following the G77 grid connection guidelines. The new ‘Windy Boy’ system means that small-scale wind power is now a viable option for many more properties.