SC Energy Data

Grid

Line Miles
The table below shows electric distribution and transmission line miles in South Carolina. Distribution lines deliver the electric power to individual customers. Transmission lines carry the electricity from power plants to different regions and substations.
 
Table 1
2019 Electric Line Miles
Utility
Distribution Line Miles
Transmission Line Miles
Dominion Energy South Carolina
18,491
3,790
Santee Cooper
2,994
5,127
Duke Energy Carolinas
26,506
5,027
Duke Energy Progress
10,151
930
Municipalities
4,096
64
SC Cooperatives 76,600 817
Total
138,838
15,755
 
SAIDI/SAIFI
Electric power system reliability can be measured and reported in several different ways to provide performance trends, both in outage duration and in outage frequency.
 
The Institute of Electrical and Electronics Engineers (IEEE) defines the generally accepted reliability indices in its standard number 1366, “Guide for Electric Distribution Reliability Indices.”
 
The most common measurement indices that distribution utilities follow and share are the System Average Interruption Duration Index (SAIDI) and the System Average Interruption Frequency Index (SAIFI).
 
SAIDI indicates the total duration of interruptions for the average customer across the electric system during a predefined period of time such as a month or a year.
 
SAIFI indicates how often the average customer experiences a sustained interruption over a predefined period of time, typically a year.
 
For more information on SAIDI and SAIFI see EIA’s video on the topic. 
 
Table 2
SAIFI and SAIDI Reliability Data
Year ending December 31, 2019
Utility
Without MEDs
With MEDs
SAIFI
SAIDI
SAIFI
SAIDI
Dominion Energy South Carolina
1.03
77.89
1.92
530.47
Santee Cooper
0.27
18.90 0.83 135.20
Duke Energy Carolinas
0.95
155 1.08 195
Duke Energy Progress
1.39
147 1.71 211
Central Electric Power Cooperative, Inc. - Transmission Level
0.27
17.8 0.34 40.6
Abbeville
1.10
735 1.09 735
Bamberg
0.03
293.54 0.03 293.54
Bennettsville
--
--
--
--
Camden
--
--
--
--
Clinton
--
--
--
--
Due West -- -- -- --
Easley
0.72
0.66
0.72
0.66
Gaffney 0.50 2.20 0.50 2.25
Georgetown
--
--
--
--
Greenwood
--
--
0.44
40.40
Greer
--
--
--
--
Laurens
0.10
4.90
0.40
39.90
McCormick -- -- -- --
Orangeburg
1.62
2.81 2.58 12.12
Newberry
--
--
--
--
Rock Hill
0.96
1.00 1.18 1.23
Seneca
0.13
21.4 0.13 21.4
Union
--
--
--
--
Westminster
--
--
--
--
Winnsboro
--
--
--
--
* No Major Event Days (MED)
 
 
Smart Meters
Smart meters record the consumption of electricity in intervals of usually an hour or less and relay the data back to the electric provider. The electric provider can use this information for monitoring and/or billing purposes. The meters also allow electric providers to remotely “see” what the consumer experiences regarding power quality and make adjustments to improve their electric utility service without requiring the consumer to initiate contact with their provider.
 
Automatic Meter Read (AMR) meters, also known as drive-by meters, communicate data about a customer’s energy use and/or outage status to electric providers by sharing information over power lines or to nearby collection equipment through radio frequencies.
 
Advanced Metering Infrastructure (AMI) meters are more advanced than AMR meters and enable two-way data communication. This system allows for better outage reporting, remote disconnection of service, the installation of load-management devices, and a finer resolution of energy use. This finer resolution allows utilities to provide information and services that give customers better control over their energy costs by capturing hourly energy use and demand data.
 
Table 3
2019 Smart Meter Penetration in South Carolina
Utility
Total Number of Meters
Manually Read Meters
AMR Meters
AMI Meters
Number of Meters
Time of Use Rate Ready
Number of Meters
Implementing Time of Use Rate
AMR/AMI
Percent of Total Meters
Dominon Energy South Carolina
770,536
161
738,597
31,778 31,778 1,902
770,375
(99.98%)
Santee Cooper
189,177
28,377 113,506 47,294 47,294 28
160,800
(85%)
SC Cooperatives
892,916
-- 37,418 855,498 630,213 62,413
892,916
(100%)
Duke Energy Carolinas
616,239
975 941 614,323 614,323 5,443
615,264
(99.84%)
Duke Energy Progress
174,456
1,652 463 172,341 172,341 5,349
172,804
(99.05%)
Municipalities
170,158
8,228 57,705 99,572 44,716 15,328
157,277
(92.43%)
Total
2,813,482
39,393
948,630
1,820,806
1,540,665
90,463
2,771,455
96.05%

DOWNLOAD DATA ARCHIVE: Grid- Smart Meter Penetration 2016-2019