Model for estimation of the potential of flexibility of objects

Sodobni trendi v elektroenergetiki kažejo na rast deleža razpršenih proizvodnih virov z možnostjo hranjenja električne energije in pametnih bremen v gospodinjskem sektorju odjemalcev oz. proizvajalcev. Cilj je, da se v prihodnosti miselnost, ki je temeljila na zagotavljanju in upravljanju prožnosti elektroenergetskega sistema samo strani proizvajalca, preusmeri na izkoriščanje prožnosti, ki jo lahko ponudijo odjemalci oz. zasebni proizvajalci. Za dobro oceno potencialne prožnosti objekta je treba poznati dinamiko odjema in morebitne proizvodnje. V prvem delu model glede na vhodne električne parametre izračuna dinamiko odjema manjših električnih naprav. V drugem delu na podlagi toplotne energetske učinkovitosti objekta, ki je odvisna od vnesenih izolacijskih parametrov, izračuna celotne toplotne izgube stavbe. Iz izračunanih toplotnih izgub, izbora tipa toplotne črpalke in temperature njenega toplotnega vira pa izračuna, kakšna je njena električna moč. Vsota električne energije, ki jo za svoje delovanje potrebujejo toplotna črpalka in preostale električne naprave, predstavlja energijo, ki jo objekt potrebuje za optimalno delovanje. V tretjem delu model glede na priključno moč in normiran profil proizvodnje izračuna količine proizvedene električne energije. Iz razlike proizvodnje in odjema izračuna količino shranjene električne energije v hranilnik predpostavljene kapacitete. V zadnji fazi model prilagaja odjem dvotarifnim cenam in cenam na trgovanja za dan vnaprej, shranjene presežke električne energije pa prilagaja izravnalnemu trgu. Prilagojen odjem električne energije nato model ekonomsko ovrednoti glede na dvotarifne cene in cene na trgovanju za dan vnaprej, shranjene presežke pa glede na izravnalni trg. Ocenjeno prožnost model ekonomsko ovrednoti tudi glede na cene za terciarno regulacijo. Prožnost objekta model izračuna iz razlike prilagojenega in osnovnega odjema. Končni cilj delovanja modela pa ni nižanje odjema električne energije, ampak prilagoditev odjema nižjim končnim cenam in ohranitvi toplotnega in energetskega udobja.Modern trends in power industry show growth of the diffuse sources within the field of renewable energy sources with the ability to save electrical energy and smart loads. The goal is to redirect the flexibility management from supply-side flexibility, to demand-side flexibility. The goal is to create a future that gives opportunities for private household consumers or producers of energy who can offer utilization of their flexibility. To get a good value out of the object’s potential flexibility, we need to know the dynamics between consumption and plausible production of energy. In the first part, the model makes calculations of small electric appliances consumption based on the input of the electric parameters. In the second part it calculates the building’s heat losses based on the object’s energetic efficiency which depends on the isolation parameters. The sum of the energy, which the object needs for its optimal operation, represents the energy that is needed for the heat pump and other electrical appliances. In the third part, it calculates the amount of the energy production based on the connection load and the predefined normalized profile of energy production. It calculates the amount of stored energy in a battery with a predefined capacity based on the difference between production and consumption. In the last phase, the model adjusts the consumption due to dual-tariff prices and the prices from the day-ahead market, while the surplus of electric energy is sold on the balancing market. The adjusted energy consumption is then economically evaluated by model based on the dual-tariff consumption prices and the prices from the day-ahead market, while the stored energy is evaluated based on the prices form the balancing market. The estimated flexibility of the object is also economically evaluated based on the prices for tertiary regulation. The model calculates the flexibility and its value from the differences between adjustable and basic consumption. The models end goal functioning is not about the lowering of consumption, but its adaptability towards lower final prices and the maintenance of warmth and energetic comfort