System and method for automatic fuel blending and control for combustion gas turbine

摘要

A flexible and automatic system and method for blending an inexpensive secondary gas (320) with a primary gas fuel (305) for operation of a Dry Low NOx gas turbine (200). The secondary gas (320) may be a gas fuel such as hydrogen, ethane, butane, propane and liquefied natural gas or an inert gas. Combustion dynamics are avoided by controlling the blended fuel (355) within a permissible range for a Modified Wobbe Index. Combustion dynamics (375) and gas turbine exhaust emissions (370) may also be monitored to maintain safe combustion with the blended fuel (355). A gas turbine control system (290) may adjust the blend (355) and temperature (361) of the primary gas fuel (305) and the secondary gas (320) to promote desired combustion.