A method and an aggregated system for forming a demand-response resource to an electricity market zone

A method (1000) for forming a demand-response resource (200) to an electricity market zone (10) and/or combined market zones (20), wherein the method (1000) comprises steps of - providing (1100) electric units (EM-1, …, EM-N) within an electricity market zone (10) operated by one or more third parties, wherein the electric units (EM-1, …, EM-N) are the same type of electric unit (EM-1, …, EM-N) and each electric unit (EM-1, …, EM-N) have an operational power consumption (110); - providing (1100) a reference response curve (120) of a reference electric unit (REM) of the electric units (EM-1, …, EM-N) having a reference operational power consumption (130); - calculating (1200) a scaling factor (140) of each electric unit (EM-1, …, EM-N) by dividing the operational power consumption (110) of each electric unit (EM-1, …, EM-N) with the reference operational power consumption (130); - transforming (1300) the reference response curve (120) as a function of scaling factor (140) associated with each electric unit (EM-1, …, EM-N), thereby providing a plurality of response curves (150); - forming (1400) a demand-response resource (200) by combining several of the electric units (EM-1, …, EM-N) into a virtual electric machine (30) as a function of a balancing demand and the response curves (150) of the plurality of electric units (EM-1, …, EM-N); and - operating (1500) the virtual electric machine (30) as a function of market demand.