SC Energy Data

Grid

Line Miles
The table below shows electric distribution and transmission line miles in South Carolina for calendar year 2016. Distribution lines deliver the electric power to individual customers. Transmission lines carry the electricity from power plants to different regions and substations.
 
Table 1
2016 Electric Line Miles
Utility
Distribution Line Miles
Transmission Line Miles
SCE&G
18,277
3,650
Santee Cooper
2,862
5,056
Duke Energy Carolinas
25,737
5,025
Duke Energy Progress
9,228
930
Municipalities
4,186
51
Total
60,290
14,712
 
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.
 
Table 2
SAIFI and SAIDI Reliability Data
Year ending December 31, 2016
Utility
Without MEDs
With MEDs
SAIFI
SAIDI
SAIFI
SAIDI
SCE&G
1.27
90.50
2.75
1,390.20
Santee Cooper
0.40
23.48
2.21
2,137.80
Duke Energy Carolinas
1.08
164
1.31
281
Duke Energy Progress
1.95
203
4.53
5,828
Central Electric Power Cooperative, Inc. - Transmission Level
0.26
19.25
0.95
601.31
Abbeville
1.40
454.33
1.40
454.33
Bamberg
0.03
2.38
0.03
2.38
Bennettsville
--
--
--
--
Camden
--
--
--
--
Clinton
11.79
46.09
--
--
Easley
0.95
77.80
--
--
Georgetown
--
--
--
--
Greenwood
--
--
0.61
46.91
Greer
1.04
1.08
--
--
Gaffney
0.82
0.50
*
*
Laurens
0.86
66.70
--
--
Orangeburg
0.30
0.55
2.55
3.66
Newberry
--
--
--
--
Rock Hill
1.54
2.12
1.89
2.73
Seneca
60
47.40
60
47.40
Union
--
--
--
--
Westminster
--
--
--
--
Winnsboro
--
--
--
--
* No Major Event Days (MED) in 2016
 
 
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
2016 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
SCE&G
728,375
284
713,176
14,915
14,915
1,575
Santee Cooper
175,056
52,682
121,096
1,278
1,309
31
SC Cooperatives
772,399
-
33,460
738,939
554,533
54,772
Duke Energy Carolinas
594,523
3,391
199,875
391,257
391,257
5,728
Duke Energy Progress
173,065
2,814
161,543
8,442
8,442
5,052
Municipalities
173,001
56,957
74,378
41,666
33,962
24,177
Total
2,616,419
116,128
1,303,528
1,196,497
1,004,418
91,335