National Electric Transmission Congestion Study - W2agz.com

4. Southern New England East-West Flows
5. Southwest Connecticut
6. Northwestern Vermont from New Hampshire
Figure 3-1. Constraints in the New England
Region (ISO-New England)
4. Central East and Total East Interface
5. UPNY-ConEd Interface
6. Westchester to New York City
7. Westchester to Long Island
Figure 3-2. Constraints in the New York Region
(New York ISO)
Many of the constraints identified in this region are
expected to be eased by transmission projects that
are either now under construction or approved by
appropriate government officials for construction.
Nonetheless, the New England region faces growing
electricity supply challenges that new transmission
could mitigate. New England has a growing
load and many of its older power plants are close to
retirement, so the region will need to consider new
investments in some combination of local generation,
transmission to bring new low-cost power into
the area (e.g., hydropower from Quebec), and more
energy efficiency and demand response to better
manage loads. The area now depends to a substantial
extent upon natural gas and oil as generation fuels,
which in today’s markets leads to high retail
electricity prices.
Constraints in the New York region
Figure 3-2 shows the following constraints in the
New York region:
1. Moses South Interface
2. Dysinger East Interface
3. West Central Interface
All of New York’s constrained transmission paths
have a common characteristic—they move power
from the west, south and north to the loads in and
around New York City and Long Island. The New
York metropolitan area is a major load pocket with
significantly less generation than load, and is
heavily import-dependent. The area’s electricity
rates are high, due in considerable part to the dependence
of local generation on natural gas and oil
fuels.
Constraints in the PJM region
Figure 3-3 shows the following constraints in the
PJM region:
1. From Allegheny Power System to PEPCO and
Dominion
2. The Western Interface and Central Interfaces of
“Classic PJM” 20
3. The Eastern Interface of “Classic PJM”
4. Branchburg transformer
5. PJM to New York City
20 PJM has expanded substantially in recent years. The term “Classic PJM” is used to refer to PJM’s footprint before the expansion, when PJM’s
territory consisted of eastern Pennsylvania, New Jersey, much of Maryland, Delaware, and the District of Columbia.
22 U.S. Department of Energy / National Electric Transmission Congestion Study / 2006