i) Electricity supply must be greater than or equal to electricity demand.
ii) Electricity supply is mainly provided by renewables and nuclear based on the user’s choices. When the supply from renewables and nuclear is less than the demand, the gap in supply will be automatically filled up by electricity generated from fossil fuels.
iii) When the supply from renewables and nuclear is greater than the demand (the case of over supply), electricity provided by thermal power from fossil fuels will automatically be zero.