IEEE Electrification - December 2022 - 46

electricity (WBE) for the baseline day (green), RTP control
day (blue), target (red), and RTP (right y-axis).
Because the building is occupied between 6 a.m. and
6 p.m., the target for ILC is estimated only during that
period. For this use case, the consumption is not optimized
over the day. In general, the target value is higher
when the price is low and is relatively lower when the
price is high.
Coordination of DERs in a Medium Office Using TCC
To illustrate the TCC process, we use results from one
simulated and one real building. The simulated (referred
to as medium office) and the real (referred to as medium
office 2) buildings are approximately 23,000 ft2, and each
is served by two multizone VAV and two single-zone
constant-volume systems. The two VAV AHUs serve
22 zones, and the two single-zone constant-volume systems
each serve one zone. Note that, with these buildings,
markets are created at the zone, system, and
building levels as described previously. Markets are also
created at the distribution and utility levels, but those
are not discussed in this article. The price-capacity
curves for the various commodities are automatically
created and aggregated, and they are eventually aggregated
to a single price-electricity capacity curve at the
building level.
The electricity curve at the building level not only
incorporates flexibility from VAV boxes, AHUs, and chillers,
it also includes inflexible electricity loads. Although there
could be multiple suppliers of electricity, in the tests we
conducted, there is only one supplier of electricity that
uses a two-tiered wholesale electricity price under which
10
20
30
40
50
60
70
0.042
0.041
0.04
0.039
0.038
0.037
0.036
Time
VAV119 Air Flow Target
VAV119 Air Flow Actual
Price
(a)
1,000
1,200
1,400
1,600
200
400
600
800
Time
VAV142 Air Flow Target
VAV142 Air Flow Actual
Price
(c)
0.042
0.041
0.04
0.039
0.038
0.037
0.036
100
150
200
250
300
50
Time
VAV143 Air Flow Target
VAV143 Air Flow Actual
Price
(d)
Figure 7. The actual (green) and target (red) zone airflow rates for zones (a) 119, (b) 120, (c) 142, and (d) 143 and the clearing price (black,
right y-axis) in the simulated medium office building for one summer day.
46
IEEE Electrification Magazine / DECEMBER 2022
10
20
30
40
50
60
70
Time
VAV120 Air Flow Target
VAV120 Air Flow Actual
Price
(b)
0.042
0.041
0.04
0.039
0.038
0.037
0.036
0.042
0.041
0.04
0.039
0.038
0.037
0.036
Air Flow (ft3/min)
Air Flow (ft3/min)
Price (US$/kWh)
Air Flow (ft3/min)
Price (US$/kWh)
Air Flow (ft3/min)
Price (US$/kWh)
Price (US$/kWh)
12 a.m.
4 a.m.
8 a.m.
12 p.m.
4 p.m.
8 p.m.
12 a.m.
12 a.m.
4 a.m.
8 a.m.
12 p.m.
4 p.m.
8 p.m.
12 a.m.
12 a.m.
4 a.m.
8 a.m.
12 p.m.
4 p.m.
8 p.m.
12 a.m.
12 a.m.
4 a.m.
8 a.m.
12 p.m.
4 p.m.
8 p.m.
12 a.m.

IEEE Electrification - December 2022

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