1/31/2020 - Wikipedia Eastern Interconnection The Eastern Interconnection is one of the two major alternating-current (AC) electrical grids in the continental U.S. power transmission grid. The other major interconnection is the . The three minor interconnections are the , Alaska, and interconnections.

All of the electric utilities in the Eastern Interconnection are electrically tied together during normal system conditions and operate at a synchronized frequency at an average of 60 Hz. The

Eastern Interconnection reaches from Central Canada The two major and three minor NERC eastward to the Atlantic coast (excluding Quebec), interconnections, and the nine NERC Regional south to Florida, and back west to the foot of the Reliability Councils. Rockies (excluding most of Texas).

Interconnections can be tied to each other via high-voltage direct current power transmission lines (DC ties), or with variable-frequency transformers (VFTs), which permit a controlled flow of energy while also functionally isolating the independent AC frequencies of each side. The Eastern Interconnection is tied to the Western Interconnection with six DC ties, to the with two DC ties, and to the Quebec Interconnection with four DC ties and a VFT. The electric power transmission grid of the contiguous United States consists of In 2016, National Renewable Energy Laboratory simulated a 120,000 miles (190,000 km) of lines year with 30% renewable energy (wind and ) in 5- operated by 500 companies. minute intervals. Results show a stable grid with some changes in operation.[1][2]

Contents Electricity demand See also References Further reading

Electricity demand The North American Electric Reliability Corporation (NERC) reported in 2008 the following actual and projected consumption for the regions of the Eastern Interconnection (all figures in gigawatts):[3] https://en.wikipedia.org/wiki/Eastern_Interconnection#cite_note-3 1/3 1/31/2020 Eastern Interconnection - Wikipedia

in GW Summer Winter Region 2007 2017 Growth 2007 2017 Growth FRCC 47 57 21.3% 42 60 42.9% MRO (US) 42 52 23.8% 35 42 20.0% NPCC (US) 61 69 13.1% 48 53 10.4% RFC 180 209 16.1% 141 164 16.3% SERC 209 243 16.3% 179 209 16.8% SPP 43 51 18.6% 31 38 22.6% US- East Interconnection 582 681 17.0% 476 566 18.9% MRO (CAN) 6.2 6.9 11.3% 7.3 8.2 12.3% NPCC (CAN) 50.3 50.7 0.8% 65.0 66.7 2.6% CAN- East Interconnection 56.5 57.6 2.0% 72.3 74.9 3.6% Eastern Interconnection 638.5 738.6 15.7% 548.3 640.9 16.9%

See also

Northeast blackout of 1965 Northeast blackout of 2003

References 1. "Eastern Renewable Generation Integration Study" (http://www.nrel.gov/grid/ergis.html). National Renewable Energy Laboratory. Retrieved 8 September 2016. 2. Bloom et al. Eastern Renewable Generation Integration Study (http://www.nrel.gov/docs/fy16osti/6 4472-ES.pdf) page xvii. National Renewable Energy Laboratory, August 2016. Technical Report NREL/TP-6A20-64472-ES. Quote: "integrating up to 30% variable wind and PV generation into the power system is technically feasible at a five-minute interval" 3. Load Forecasting Working Group of the Reliability Assessment Subcommittee (August 2008). "2008-2017 Regional and National and Energy Forecasts Bandwidths" (https://we b.archive.org/web/20090327045639/http://www.nerc.com/docs/pc/lfwg/NERC_2008-2017_Region al_Bandwidths.pdf) (PDF). North American Electric Reliability Corporation: 7–12. Archived from the original (http://www.nerc.com/docs/pc/lfwg/NERC_2008-2017_Regional_Bandwidths.pdf) (pdf) on 2009-03-27. Retrieved 2008-12-15.

Further reading

2008 Long Term Reliability Assessment 2008-2017 (http://www.nerc.com/files/LTRA2008v1_2.pd f) (PDF). North American Electric Reliability Corporation. 27 January 2009. Retrieved 2 March 2016. 2015 State of Reliability (http://www.nerc.com/pa/rapa/pa/performance%20analysis%20dl/2015% 20state%20of%20reliability.pdf) (PDF). North American Electric Reliability Corporation. May 2015. Retrieved 2 March 2016. Current projects (http://www.transmissionhub.com/articles/2016/03/while-investment-may-slow-in- coming-years-plenty-of-transmission-construction-investment-happening.html)

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