  Peer-to-peer interactions between small-scale energy resources exploit
distribution network infrastructure as an electricity carrier, but remain
financially unaccountable to electric power utilities. This status-quo raises
multiple challenges. First, peer-to-peer energy trading reduces the portion of
electricity supplied to end-customers by utilities and their revenue streams.
Second, utilities must ensure that peer-to-peer transactions comply with
distribution network limits. This paper proposes a peer-to-peer energy trading
architecture, in two configurations, that couples peer-to-peer interactions and
distribution network operations. The first configuration assumes that these
interactions are settled by the utility in a centralized manner, while the
second one is peer-centric and does not involve the utility. Both
configurations use distribution locational marginal prices to compute network
usage charges that peers must pay to the utility for using the distribution
network.
