First, there are a few concepts that it is important to understand:

1. Source Energy: this is energy which is converted into another form of energy, for use by consumers. For instance, natural gas can be used to generate electrical energy. It does so by using it as a propellant to drive a gas turbine, or by using the heat from combustion to make steam to drive turbines.
2. Generated energy: this is the energy which is supplied to consumers, and to which source energy has been converted.
3. Certificate: A generic term for the evidence of the source of an instance of energy generation (e.g. 1MWh), such as Guarantees of Origin (GoO) - see PRO Section B, "Definitions and Interpretation".
4. Scheme:an international system for the transfer of certificates.

If you don't find the answer to your questions, please feel free to email us at info@aib-net.org.