492.3 MW Natural Gas Fired Combustion Turbine (333 MW) + Petroleum Liquids (159 MW) operating in Harford, MD — PJM Interconnection, LLC
492.3 MW
Nameplate Capacity
5
Generators
units
Hybrid (2)
Technology
Natural Gas Fired Combustion Turbine + Petroleum Liquids
1972
Operating Since
Coordinates
39.4428, -76.2218
County
Harford, MD
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Constellation Power Source Generation, LLC | Constellation Power Source Generation | — |
| Owner(s) | Constellation Power Source Generation, LLC | Constellation Energy | — |
| Status | Operating | — | — |
The Perryman Generating Station is a 353 MW electric generating peaking power plant owned by Constellation Energy, located near Aberdeen, Maryland. Perryman has five units; four are oil-fired, and one is natural gas-fired.
Read more on WikipediaThe Perryman power plant is located in Harford County, Maryland. It is owned by Constellation Energy and operated by Constellation Power Source Generation, LLC. The plant has a total capacity of 492.3 MW across 5 generators and primarily uses distillate fuel oil (DFO), but also utilizes natural gas. Perryman began operating in 1972 and is considered a hybrid plant due to its use of multiple fuel sources.
In the most recent year with available data, Perryman generated 250,760 MWh of electricity, resulting in a capacity factor of 5.8%. The plant operates within the PJM Interconnection, LLC balancing authority and the RFC NERC region. Perryman is ranked as the 2nd largest of 4 similar plants in Maryland, and 24th out of 60 nationally.
Generated from EIA, GEM, and public data sources
NERC Region
RFC
Balancing Authority
PJM Interconnection, LLC
Grid Voltage
115 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
16.2K MWh
Latest Month
250.8K MWh
Annual Generation
5.8%
Capacity Factor
No financial data available for this plant.
Market Position
ISO/RTO Market
PJM
LMP Node
PERRYMAN33 KVCT 51
Pricing Hub
WESTERN HUB
Location Type
Generation Node
Node Source
EIA-860 direct report
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Last updated 2026-03-21
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