Power Plant and Method of Operation

A power plant arrangement comprises at least one main air compressor (12) to provide at least a first portion of a compressed ambient gas flow (26) and at least one gas turbine assembly. Each assembly comprises a turbine combustor (32) for mixing the first portion of compressed ambient gas flow (26) with a recirculated low oxygen content gas flow (50) and a fuel stream (28) for burning to form the recirculated low oxygen content gas flow (50). A recirculation loop (52) for recirculating the recirculated low oxygen content gas flow (50) from a turbine (34) to a turbine compressor (30) is provided. At least one auxiliary apparatus is fluidly connected to the main air compressor (12) and may be at least partially mechanically powered by at least a second portion of a compressed ambient gas flow (25) from the at least one main air compressor (12).