Southern Power nears permit for 530-MW gas plant in Texas

Southern Power is getting close to a decision by the Texas Commission on Environmental Quality (TCEQ) on a Greenhouse Gas (GHG) Prevention of Significant Deterioration (PSD) Air Quality Permit that would authorize construction of the Trinidad Generating Facility.

The project site is located east of Highway 274 and west of Forehand Road, approximately 0.75 miles north of Highway 31 at Trinidad in Henderson County, said the commission in a Dec. 10 notice posted to its website on Dec. 14. This application was submitted to the TCEQ on Dec. 23, 2014.

The commission’s executive director has determined that the emissions of air contaminants from the proposed facility which are subject to PSD review will not violate any state or federal air quality regulations and will not have any significant adverse impact on soils, vegetation, or visibility. The executive director has completed the technical review of the application and prepared a draft permit which, if approved, would establish the conditions under which the facility must operate.

The Trinidad Generating Facility (TGF) will include a natural gas-fired combined cycle combustion turbine generator (CTG) equipped with heat recovery steam generator (HRSG) and natural gas-fired dry low NOx (DLN) combustors. Ancillary equipment includes an auxiliary boiler, natural gas piping fugitives, diesel-fired firewater pump, planned maintenance activities, and circuit breakers.

The facility will consist of a Mitsubishi Heavy Industries (MHI) 501J model gas-fired combustion turbine nominally rated at 497 MW, equipped with a HRSG and duct burners (DBs) with a maximum design capacity of 402 million British thermal units per hour (MMBtu/hr). The gross nominal output of the CTG with a HRSG and DB is 530 MW. The auxiliary boiler will have a maximum heat input of 110 MMBtu/hr and will be limited to annual operations of 1500 hours/year. The 160-hp diesel fired fire water pump will be limited to 100 hours of non-emergency operation per year.

A project contact is: Southern Power Co., Ms. Kelli Mccullough, Environmental Engineer, (205) 257-6720.

Southern Power is a unit of Atlanta-based Southern Co. (NYSE: SO).

About Barry Cassell 20414 Articles
Barry Cassell is Chief Analyst for GenerationHub covering coal and emission controls issues, projects and policy. He has covered the coal and power generation industry for more than 24 years, beginning in November 2011 at GenerationHub and prior to that as editor of SNL Energy’s Coal Report. He was formerly with Coal Outlook for 15 years as the publication’s editor and contributing writer, and prior to that he was editor of Coal & Synfuels Technology and associate editor of The Energy Report. He has a bachelor’s degree from Central Michigan University.