Starting control device of micro gas turbine and starting control method

Abstract

The invention discloses a starting control device of a micro gas turbine and a starting control method. The starting control device comprises a data measurement module, a starting implementation module and a digital control unit, wherein the data measurement module consists of a rotating speed sensor and a temperature sensor, and the starting implementation module consists of a starting motor, an igniter, a fuel protection solenoid valve and a fuel flow control proportional solenoid valve. The starting control method comprises the following steps: controlling the starting motor through the digital control unit, driving a gas turbine to rotate at a set rotating speed, maintaining the rotating speed, adjusting fuel flow through controlling the fuel flow control proportional solenoid valve to realize proper proportional matching of fuel and air, igniting the mixed gas with the igniter, raising the rotating speed of the gas turbine, and making the gas turbine into an idling state through closed-loop control of a microcontroller according to the exhaust temperature and the rotating speed of the gas turbine, thereby completing the starting. The invention can effectively avoid the influence of changes in the fuel flow, the state of the gas turbine and the atmospheric conditions during the starting process, solve the problems of the micro gas turbine in the harsh environment such as difficult and unstable starting and the like, and ensure that the gas turbine can be started under any condition.

Description

technical field [0001] The invention relates to a start-up control device and a start-up control method of a miniature gas turbine, belonging to the technical field of start-up control of gas turbines. Background technique [0002] Before the micro gas turbine can operate by its own power, it needs to use the starter motor as an external power source to drive the gas turbine to rotate, to provide the combustion chamber with an air flow that meets the starting requirements, and the air entering the combustion chamber is mixed with the fuel. When the fuel and air in the combustion chamber After the air-fuel ratio (hereinafter referred to as the air-fuel ratio) reaches the ignition condition, the ignition is successful, the mixed gas burns violently, drives the gas turbine turbine to do work, drives the gas turbine to accelerate continuously, and completes the start-up. Finally, the gas turbine completely relies on the energy generated by itself to run and provide power to the o...

AI Technical Summary

Problems solved by technology

The entire starting control device and starting control method keep the gas turbine stable at a set speed, so that the air flow in the combustion chamber is at a stable value during the starting process. A fixed variable increases the amount of fuel entering the combustion chamber, and finally the air-fuel ratio in the combustion chamber will reach the required ignition ratio, so that the gas turbine startup process is less affected by changes in fuel flow, gas turbine status, and atmospheric conditions, effectively solving the problem in harsh environments. Difficult start-up and instability of micro-small gas turbines, to ensure that the gas turbine can be reliably started under any conditions, and to ensure the stable operation of the subsequent gas turbines

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