Electric Transmission System
Electric transmission systems carry large amounts of power at high voltages from generators to substations. Transmission systems must be kept highly reliable to prevent blackouts and ensure robust energy markets. Synchrophasor technology has emerged as key enabler for improving transmission reliability and operations. Phasor measurement units (PMUs), phasor data concentrators (PDCs), wide area communications networks, and advanced transmission applications are building blocks of a smarter and more reliable transmission system. This chart shows number of PMUs being deployed as part of the SGIG program and the approximate extent of coverage in the United States resulting from SGIG funding.
The table below includes SGIG program transmission system expenditures.
SGIG Program Electric Transmission Asset Expenditures
Program Data for September 30th, 2012
Updated September 26, 2012
Electric Transmission System Assets |
Quantity * |
Incurred |
Number of |
PMUs |
420 |
$31,552,313 |
12 |
Phasor data concentrators |
86 |
$9,318,341 |
12 |
Dynamic rating systems |
0 |
$0 |
0 |
IT hardware, systems, and applications that enable transmission functionalities |
|
$46,659,874 |
31 |
Advanced applications |
|
$14,853,263 |
14 |
Other transmission related costs |
$143,446,787 |
22 |
|
Total transmission installed cost |
$245,830,579 |
22 |
* In some circumstances, costs are incurred before devices are installed resulting in a reported cost where the quantity is zero.
* All dollar figures are the total cost, which is the sum of the federal investment and cost share of the recipient (the recipient cost share must be at least 50% of the total overall project cost).
** Projects only report data on devices they plan to install. Each project installs equipment that best supports their individual goals. Therefore, the number of projects reporting is expected to vary by equipment category. The individual project reporting pages show what equipment that project is installing.