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
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