IEEE Power & Energy Magazine - May/June 2016 - 39

figure 2. The Olympic Peninsula dashboard summary.

to wholesale price fluctuations, the transactive system also
managed congestion on a distribution circuit, by managing
all of the devices as if they were on one circuit and seasonally adjusting the capacity setting of that circuit to exercise
constrained operating conditions. the project controlled the
imported capacity of the circuit below the constraint for all
but one 5-min interval over the entire project year.

AEP Ohio gridSMART Real-Time Pricing
Demonstration, 2010-2014
Building upon the olympic Peninsula project, the aeP
ohio gridSMart (gridSMart is a registered trademark
of aeP ohio) demonstration project had a real-time pricing
(rtP) component, called SMart choice (SMart choice
is a registered trademark of aeP ohio), that used a 5-min
double-auction market to dispatch participating responsive
loads on each of four distribution circuits. the preferences of
household occupants were reflected in software agents that
developed an overall price flexibility curve for the household
and coordinated device control actions [in this case heating,
may/june 2016

ventilation, and air conditioning (HVac) units] with the
market system. a market clearing engine at the operations
center aggregated the bids from all households to form a
price-sensitive demand curve for the distribution circuit and
calculated a clearing price and a supply bid, which incorporated the regional market operator's (PJM) 5-min wholesale
locational marginal price for electricity. the clearing price
was broadcast back to the households and captured in the
billing system according to a tariff approved by the regulator,
the Public utility commission of ohio. an overview of the
rtP system design is presented in figure 3.
the rtP experiments ran over the late spring and summer
of 2013 and involved four feeders with approximately 200
households actively participating. figure 4 shows this transactive system in action on a hot summer day. as expected,
the short-term energy use was negatively correlated with the
electricity price. in addition, many experiments were held to
determine the HVac resources' response to peak-shaving
conditions by temporarily lowering the circuit capacity limits on the circuits. under this situation, the billing system
ieee power & energy magazine

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Table of Contents for the Digital Edition of IEEE Power & Energy Magazine - May/June 2016

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