Start fuel supply control method and system for micro gas turbine

Abstract

The invention discloses a start fuel supply control method and system for a micro gas turbine, and is used for fuel supply control in the start process of the micro gas turbine. The micro gas turbine adopts a centrifugal atomization fuel nozzle, fuel is supplied to the centrifugal atomization fuel nozzle through a fuel control unit, atomized by the centrifugal atomization fuel nozzle, and ignited for combustion in a combustion chamber; the fuel supply requirements of the micro gas turbine in plain and plateau application scenarios can be met through adjusting the flow amount and / or a spray cone angle of the centrifugal atomization fuel nozzle. According to the method and system, under the condition of not changing technical parameters of the fuel supply control unit, the flow pressure characteristics of the fuel nozzle can be changed, the start fuel flow can be reduced, the gas-fuel ratio of ignition start can be increased, the fuel pressure in front of the nozzle can be increased, the atomization performance is enhanced, and the plateau ignition start performance is enhanced, and thus the fuel supply characteristic requirements of the micro gas turbine in high altitude application can be met and the operation field range of the micro gas turbine is widened.

Description

technical field [0001] The invention relates to the technical field of combustion and control of gas turbines, in particular, to a method and system for controlling start-up fuel supply of micro gas turbines. Background technique [0002] Microturbine (Microturbine or Micro-turbines) is a newly developed small-scale heat engine. Its stand-alone power ranges from 25 to 300kW. It is mainly composed of a compressor, a combustion chamber, a turbine, some generator sets, and a regenerator. The micro gas turbine generating set has a series of advantages such as high efficiency, low noise, light weight, small size, low pollution, and multiple integrated expansion. It plays an important role and strategic significance in national economic fields such as electric power and power, and national security. , It is of great significance to the development of high-tech in my country's related fields such as energy, electric power, aviation, aerospace, ships, vehicles, military and other nat...

AI Technical Summary

Problems solved by technology

[0015] The purpose of the present invention is to provide a start-up fuel supply control method and system for a micro gas turbine, so as to solve the problem that the existing micro gas turbine adopts a fuel regulator to reduce the fuel supply to meet the high-altitude application scene, resulting in impaired ignition performance or even ignition failure. question

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