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A kind of fuel control method in gas turbine speed-up process

A gas turbine and fuel control technology, which is applied in the fuel control of turbine/propulsion device, gas turbine device, engine control, etc., can solve the problem of unsuitable fuel control, and achieve reduced fluctuation, safe, reliable and stable operation, and increased stability. Effect

Active Publication Date: 2022-08-02
DONGFANG ELECTRIC AUTOMATIC CONTROL ENG CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technology is aimed at the calculation of the opening of the fuel valve, and it is not suitable for the control of the fuel during the speed-up process of the gas turbine

Method used

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  • A kind of fuel control method in gas turbine speed-up process
  • A kind of fuel control method in gas turbine speed-up process
  • A kind of fuel control method in gas turbine speed-up process

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Embodiment Construction

[0025] The invention discloses a fuel control method in a gas turbine speed-up process, such as Figure 1-3 shown, including the following steps:

[0026] Step 1: After the gas turbine reaches the ignition speed, the control system issues the ignition plug ignition command according to the received fuel input request, and maintains the ignition state for 30-90s.

[0027] Step 2: Open the gas shut-off valve, close the gas discharge valve, and at the same time open the pressure control valve A to the preset opening degree of about 25% according to the flow required for ignition, keep it for 5-15 seconds, and then put it into the pressure control valve. Pressure PID control loop.

[0028] Step 3: Open the duty flow control valve and the main flow control valve and delay 0-10s, so that the fuel command is set from the low ignition fuel flow setting value to 0.5-5g / s 2 rate to the high ignition fuel flow setpoint. Among them, the low ignition fuel flow setting value is 25.2 g / s,...

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Abstract

The invention discloses a fuel control method during the acceleration process of a gas turbine, comprising: 1: sending an ignition command according to a received fuel input request; 2: opening a pressure control valve A to a preset opening degree, and then putting the pressure control valve in PID control loop of pressure behind the valve; 3: Open the duty flow control valve and the main flow control valve and delay it, so that the fuel command is increased at the set rate; 4: After the ignition is successful, the fuel is put in according to the setting; 5: During the acceleration process , when the pressure control valve A opens to 75% of the opening, open the pressure control valve B, and the pressure control valve B controls the pressure after the pressure control valve A and the pressure control valve B through the pressure PID control loop; When the set value is set, the control pressure control valve A and the pressure control valve B are fully opened; when the speed rises steadily to the target speed, the speed PID control loop is put into operation to complete the fuel control during the speed increase. The invention can ensure the safe, reliable and stable operation of the gas turbine.

Description

technical field [0001] The invention relates to the field of gas turbine protection, in particular to a fuel control method in a gas turbine speed-up process. Background technique [0002] Since the 1980s, gas turbines and their combined cycle units have risen rapidly around the world and have been widely used. Gas turbines and their combined cycle fueled by oil and natural gas have a series of advantages such as high overall cycle efficiency, minimal environmental pollution, good peak-shaving performance, and short construction period, and have become the development direction of thermal power systems. [0003] For a gas turbine, its fuel control is the core and most basic part of the entire control strategy. Existing gas turbines usually perform fuel control through the cooperation of gas on-off valves, gas discharge valves, pressure control valves, flow control valves, and the like. However, this conventional control method does not take into account the influence of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02C9/26F02C9/48F02C7/264
CPCF02C9/263F02C9/48F02C7/264F05D2270/706
Inventor 郑晗琪吴志方
Owner DONGFANG ELECTRIC AUTOMATIC CONTROL ENG CO LTD