A gas turbine startup control system and method

Abstract

The invention discloses a gas turbine starting control system and method, the gas turbine starting control system includes a gas turbine generator and a control system, the control system is connected with the gas turbine generator; the gas turbine generator is used to generate gas; the The control system includes a start controller and several temperature acquisition units; the temperature acquisition unit is used to collect several temperature parameter data of the gas turbine, and transmit the temperature parameter data to the start controller; the start control The controller is connected to the gas turbine generator; the starting controller generates a control instruction based on the temperature parameter data, and transmits the control instruction to the gas turbine generator to control the gas turbine generator. The invention can increase the starting speed of the gas turbine by dynamically adjusting the oil supply amount and the current of the starting motor under the condition of not exceeding the temperature and limiting the current.

Description

technical field [0001] The invention relates to the technical field of gas turbine control, in particular to a gas turbine startup control system and method. Background technique [0002] In view of the existing gas turbine start-up control, a fixed control law is mainly used to set the increase rate of the fuel injection quantity, and the start-up is performed according to a fixed time sequence, without considering the influence of environmental changes on the start-up of the gas turbine, and only relying on the non-overtemperature and current-limited The safety threshold is used to emergency stop to protect the gas turbine. However, due to changes in the operating environment of the gas turbine, such as a decrease in the intake air volume due to an increase in the ambient temperature, an increase in the power consumption of the compressor, and an excessively high temperature rise of the body under the high current of the generator, the imbalance of the oil-gas ratio leads ...

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Problems solved by technology

[0002] In view of the existing gas turbine start-up control, a fixed control law is mainly used to set the increase rate of the fuel injection quantity, and the start-up is performed according to a fixed time sequence, without considering the influence of environmental changes on the start-up of the gas turbine, and only relying on the non-overtemperature and current-limited Safety Threshold to Protect Gas Turbine in Emergency Shutdown

However, due to changes in the operating environment of the gas turbine, such as a decrease in the intake air volume due to an increase in the ambient temperature, an increase in the power consumption of the compressor, and an excessively high temperature rise of the body under the high current of the generator, the imbalance of the oil-gas ratio leads to a decrease in the power output of the turbine, which not only reduces the starting The success rate of the gas turbine also brings adverse effects such as reduced service life of the hot end components of the gas turbine and the starting system

In addition, when the ambient temperature is low, the initial gas temperature change rate and the temperature margin of the starter motor are large, and the gas turbine is started according to the solidification sequence, the fixed motor current increase rate, and the fuel oil supply increase, which reduces the rapid start of the gas turbine. sex

To sum up, the start-up of gas turbines at this stage has the problems of long start-up time and low success rate

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