electricity markets the polish experience challanges of unification tomasz siewierski phd w?adys?aw mielczaski prof market research group technical university ?od? poland contents presentation overview power sector eu accession consequences liberalization regulatory framework historical and current situation structure operation in privatization ownership model competition enhancement energy environment renewable sources regulation finance protection issues financial outcome cross border trade central europe enabling pan european stranded emerging problems ppa reserve capacity identity problem looking for proper position tso dso regulator evolution design freedom toward real time efficient with parallel local purchase 2007 tpa household customers security supply strategy until 2025 relationship to policy business opportunities what we offer can do together pros & cons production cost ver price volume allocation break wall