Moreover, such technologies increase the potential of including wind power in the ancillary services of maintain- ing voltage and frequency in the electricity supply.
The next key point is to include small CHP plants in the regulation as well as adding heat pumps to the system. Such technologies are of particular importance since they provide for the possibility of changing the ratio between electricity and heat demand while still maintaining the high fuel efficiency of CHP.
The third key point is to add electrolysers to the system and at the same time provide for a further inclusion of wind turbines in the voltage and frequency regulation of the electricity supply.
By implementing the three key technological changes the analyses show that the Danish energy system can be converted into a 100% renewable energy system when combining 180 TJ/yr of biomass with 5000 MW photo- voltaics and between 15 and 27 GW of wind power. In the reference, 27 GW wind power is necessary, while in combination with savings and efficiency improvements the needed capacity is reduced to around 15 GW.
15 GW wind power can be reached by installing
500 MW/yr. Today Danish manufactories produce ap- proximately 3000 MW wind power per year