IEEE Power & Energy Magazine - July/August 2020 - 49

follow a similar pattern, so for the sake of simplicity, we
focus just on the CVaR.) Interestingly, reducing the repair
time under adverse weather reduces the CVaR significantly
(by 35%, from US$4,113,000 per year to US$2,690,000
per year) while the corresponding EENS reduction is more
limited (by only 13%). This exemplifies the fact that one
enhancement solution may be preferred from a reliability perspective, while, from a resilience perspective, other options
may be more attractive.

Remarkably, the option in which lines are underground
features an attractive compromise between reliability and
resilience indicators, reducing the EENS cost by 48% (which
is not as good as the 93% reduction related to the N−1 solution but not as bad as the 13% reduction related to the N−0
case with shorter response times) and reducing the CVaR
by 31% (which is not as good as the 35% reduction related
to the N−0 case with shorter response time but not as bad as
the 6% reduction associated with the N−1 solution). This is

table 1. The reliability and cost information associated with two alternative network design options.
Option N-0
Cost of Investment Calculation
Unit cost of investment (US$/MW per
km per year)

100

Length (km)

200

Capacity per circuit (MW)

250

Number of circuits

2

Cost of investment (US$)

10 million

Cost of the EENS Calculation

Circuit 1

Circuit 2

State
Probability

Available Power Not
Capacity Supplied
(MW)
(MW)

VoLL (US$/MWh)

1,000

Available

Available

0.9997629

500

0

Expected power not supplied (MW)

0.06148

Unavailable

Available

0.0001142

250

250

Time horizon (h)

8,760

Available

Unavailable

0.0001142

250

250

Cost of the EENS (US$)

538,532

Unavailable

Unavailable

8.782E-06

0

500

Circuit 1

Circuit 2

State
Probability

Available Power Not
Capacity Supplied
(MW)
(MW)

Total cost calculation
Total cost (US$)

10,538,532

Option N-1
Cost of Investment Calculation
Unit cost of investments (US$/MW
per km per year)

100

Length (km)

200

Capacity per circuit (MW)

500

Number of circuits

2

Cost of investment (US$)

20 million

Cost of the EENS Calculation
VoLL (US$/MWh)

1,000

Available

Available

0.9997629

1,000

0

Expected power not supplied (MW)

0.00439

Unavailable

Available

0.0001142

500

0

Time horizon (h)

8,760

Available

Unavailable

0.0001142

500

0

Cost of the EENS (US$)

38,464

Unavailable

Unavailable

8.782E-06

0

500

Total cost calculation
Total cost (US$)
july/august 2020

20,038,464
ieee power & energy magazine

49



IEEE Power & Energy Magazine - July/August 2020

Table of Contents for the Digital Edition of IEEE Power & Energy Magazine - July/August 2020

Contents
IEEE Power & Energy Magazine - July/August 2020 - Cover1
IEEE Power & Energy Magazine - July/August 2020 - Cover2
IEEE Power & Energy Magazine - July/August 2020 - Contents
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IEEE Power & Energy Magazine - July/August 2020 - Cover3
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