Petroleum Liquids, Natural Gas Fired Combustion TurbinePJM · Harford County

Perryman

Constellation Power Source Generation, LLC · Harford County · PJM

Perryman is a natural gas-fired power facility with 492.3 MW of EIA-reported nameplate capacity in Harford County, Maryland, registered as EIA Plant ID 1556. Constellation Power Source Generation, LLC owns and operates the plant. Its 2014–2015 Unit 6 expansion used two dual-fuel Pratt & Whitney FT4000 turbines connected to one generator; the mechanical contractor described the arrangement as a first-of-its-kind Pratt & Whitney design for that size range.

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Reported capacity: 492.3 MW
EIA-reported nameplate capacity; other nameplate and seasonal ratings may differ.
Technology: Natural Gas Fired Combustion Turbine, Petroleum Liquids
Primary generation technology.
Registry anchor: Plant 1556
Constellation Power Source Generation, LLC · Harford County · PJM
Operating status

Common questions about Perryman

Answered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.

Generator	Capacity	Technology	Operation	Status
GT1	53.1 MW 52 MW summer	Petroleum Liquids Disillate Fuel Oil · GT	Jan 1972	Operating
GT2	53.1 MW 51 MW summer	Petroleum Liquids Disillate Fuel Oil · GT	Apr 1972 Retirement: Feb 2016	Operating
GT3	53.1 MW 51 MW summer	Petroleum Liquids Disillate Fuel Oil · GT	Apr 1972	Operating
GT4	53.1 MW 52 MW summer	Petroleum Liquids Disillate Fuel Oil · GT	Apr 1972	Operating
GT5	192 MW 139 MW summer	Natural Gas Fired Combustion Turbine Natural Gas · GT	Jun 1995	Operating
GT6	141 MW 109.8 MW summer	Natural Gas Fired Combustion Turbine Natural Gas · GT	Jun 2015	Operating

Largest reported plants in this portfolio
Largest reported plants	Capacity	State
PerrymanCurrent	492.3 MW	MD
Philadelphia	82.8 MW	MD

How big is Perryman?

Perryman has a reported capacity of 492.3 MW. Source: EIA Form 860.

What kind of plant is Perryman?

Perryman is a Natural Gas Fired Combustion Turbine, Petroleum Liquids facility in Harford County, MD, participating in the PJM market.

Where is Perryman located?

Perryman is in Harford County, MD, inside the PJM balancing area.

Who operates Perryman?

Perryman is operated by Constellation Power Source Generation, LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.

How much electricity does Perryman generate?

Perryman reported 342.5 GWh over the twelve months to 2026-04. Figures are net generation as filed to EIA-923.

How does Perryman compare to other plants?

By capacity, Perryman ranks #167 of 825 operating plants of the same technology nationally. It ranks #3 of 8 in MD.

Perryman

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Perryman

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Common questions about Perryman

How big is Perryman?

What kind of plant is Perryman?

Where is Perryman located?

Who operates Perryman?

How much electricity does Perryman generate?

How does Perryman compare to other plants?

Co-located assets

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