Single Electricity Market Commission for Regulation of Utilities

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since 1 november 2007 commission regulation of utilities, (known commission energy regulation (cer)) , utility regulator, referred regulatory authorities or ras, have jointly regulated all-island wholesale electricity market known single electricity market (sem). sem covers both northern ireland , republic of ireland.


the decision-making body governs market sem committee, consisting of cru, utility regulator independent member (who has deputy), each entity having 1 vote.


the detailed rules of sem set out in trading , settlement code, overseen sem committee.


at high level, sem includes centralised gross pool (or spot) market which, given mandatory nature key generators , suppliers, liquid. in pool electricity bought , sold through market clearing mechanism, whereby generators bid in short run marginal cost (srmc) , receive system marginal price (smp) each trading period scheduled market quantities. generators receive separate payments provision of available generation capacity through capacity payment mechanism, , constraint payments differences between market schedule , system dispatch. suppliers purchasing energy pool pay smp each trading period along capacity costs , system charges.


for further information on sem please see www.semcommittee.com.







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