Electrical Connection

Once you start generating electricity, it needs to be converted into a format acceptable to the Grid.

For small micro generator turbines, this calls for a ‘rectifier’ and an ‘inverter’ which work to process the electricity to grid-synchronised AC. In accordance with regulations, they contain various safety fuses and isolator switches. Larger scale turbines are connected 3-phase directly to the grid.

The electrical connection for 10kW turbines is usually only ‘3-phase’. However, SIAC Wind Energy uses the world-class Bergey small turbine which allows for either a single or 3-phase connection.

When you connect electricity generating installations to the grid, you will need to inform – or get approval from - your Distribution Network Operator (DNO). This is the company that operates the distribution network in your area, and isn’t necessarily the company you pay you electricity bills to. The Energy Networks Association can provide the relevant Engineering Recommendations along with a map showing which DNO covers each area of the country.

The grid capacity needs to be confirmed for the size of turbine being connected. Then technically, the UK regulation requirements are:

For small systems (less than 16 amps per phase)

These should conform with Engineering Recommendation G83, which just requires the DNO to be notified. This is the case for a 3-phase connection of a Bergey 10kW turbine.

For larger systems

These should conform with G59/2, which requires prior approval from the DNO and also (at their discretion) the witnessing of the connection. This is the case for a single-phase connection of a Bergey 10kW turbine.

For Eire, there are similar EN50438 regulations here.