IEEE Power & Energy Magazine - September/October 2017 - 90

Water-Level
Controller

Modem

7 km

MGCC
Serial/
Ethernet

Modem

Ethernet
Radio

analysis and tuning should be
carried out to ensure the stable
operation of remote microgrids,
especially those housing different
DER types.

Field, British Columbia

Field is a remote community of ap----
proximately 159 electricity custo-
mers in the province of British
Columbia, Canada, located 300 km
northwest of Calgary within the
confines of Canada's Yoho National
Ethernet Switch
Electrolyzer
Ethernet
Park. The community is accesPLC
Radio
Compressor
sible by road via the Trans-Canada
Local
Local
Local
Highway. The community's elecHydrogen
Controller
Controller
Controller
tricity requirement is supplied by
Tank
a 57-km, radial 25-kV distribution
feeder from the Golden substaEthernet
Fuel Cell
PLC
Radio
tion. Because the area surrounding the feeder route experiences
severe environmental conditions
figure 8. The Bella Coola microgrid control and communication scheme.
and is covered with natural forest,
this feeder experiences frequent
An MGCC and monitoring system was developed, com- power outages of long duration, resulting in negative social
prising a central optimization control, local controllers and and economic impacts on the community. In addition, most
programmable logic controllers (PLCs), and other typical of the feeder runs adjacent to the Canadian Pacific Rail line,
communication and automation equipment (see Figure 8). The restricting access for unscheduled repairs. Hence, the feeder
microgrid control and monitoring system is aimed at finding experiences an average time of 8 h/outage-with some parthe optimal charging/discharging schedule of the HFCESS to ticularly long outages, as was the case on 29 June 2013 when
maximize the hydro generation utilization factor and mini- the community experienced a 50-h power outage until technimize diesel fuel consumption. In addition, the system coordi- cians could access the location and make repairs. The load
nates various assets of the microgrid to guarantee stable and forecast for the Golden area predicted that the substation
capacity would be exceeded by 1-2 MW at peak hours during
reliable operation.
Various lessons have been learn---ed from the HARP project. the 2013-2014 winter.
To address the challenges pertaining to feeder outage and
First, HFCESSs were demonstrated to be a reliable and practical technology for displacing diesel generator production, thus capacity constraints, two solutions were initially proposed: 1)
decreasing fuel costs and emissions. Second, the im--plementation installing diesel generators and 2) installing BESSs. Although
of automatic control and communication -technologies was the former solution was less expensive than the latter, BC
proven to be a viable solution to address energy challenges Hydro decided to install the BESS because using diesel fuel
in re--mote communities. Finally, it was learned that careful to supply energy to the community is not an environmentally
friendly approach, considering that Field is located within
the Yoho National Park. The BESS installation was required
table 3. The Field BESS project battery specifications.
to have peak shaving and islanding capabilities, as well as to
withstand extremely harsh temperatures (as low as −50 °C).
Power
1 MW
After evaluating the proposals, a sodium-sulphur (NaS) batExpected service life
15 years
tery was selected that met all technical and economic requireRated dc voltage
640 V
ments; the BESS specifications are provided in Table 3. In
addition, the PCS included a 1.25-MVA inverter and chopPower density
99 kW/m3
per accompanied by the necessary local and master controls.
Capacity
6.5 MWh
Due to the remoteness and terrain of the Field BESS site, satEfficiency
85%
ellite communication was not reliable, and there was no cellular infrastructure. Hence, the communication between the
Fast charging time
9-10 h
BESS installation and BC Hydro's supervisory control and
Energy density
59.6 kWh/m3
data acquisition (SCADA) was established through a C-band
90	

ieee power & energy magazine	

september/october 2017



Table of Contents for the Digital Edition of IEEE Power & Energy Magazine - September/October 2017

IEEE Power & Energy Magazine - September/October 2017 - Cover1
IEEE Power & Energy Magazine - September/October 2017 - Cover2
IEEE Power & Energy Magazine - September/October 2017 - 1
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IEEE Power & Energy Magazine - September/October 2017 - Cover3
IEEE Power & Energy Magazine - September/October 2017 - Cover4
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