Gas turbine supercharger pressure regulation method and system

A technology for gas turbine and pressure regulation, which is applied in the direction of gas turbine devices, turbine/propellant fuel delivery systems, charging systems, etc., and can solve problems such as non-energy saving, high turbocharger power, and uneconomical

Active Publication Date: 2021-06-04
中国东方电气集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the power of the turbocharger designed and selected in this way is too large in most cases in the actual operation process, because the gas turbine has the characteristics of rapid load disturbance, peak regulation, etc., usually the gas turbine power plant does not operate at full load, and The working condition of varying loads due to power grid dispatching also often occurs, resulting in too high power of the turbocharger when the gas turbine is under partial load, which is uneconomical and energy-saving

Method used

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  • Gas turbine supercharger pressure regulation method and system
  • Gas turbine supercharger pressure regulation method and system
  • Gas turbine supercharger pressure regulation method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Such as figure 2 As shown, the overshoot c of each interval is 0.

[0049] Such as image 3 As shown, when the actual load rate a of the gas turbine is 91%, the control device judges that it is in the range of 90%~95%, and then selects the upper limit of the range of 95% as a reference to calculate the outlet pressure value of the supercharger, according to image 3 Corresponding relationship of the curve, at this time, the outlet pressure P2 corresponding to the supercharger is 3.36Mpa.

Embodiment 2

[0051] When different actual load rates a are located in different intervals, the overshoots corresponding to different intervals are equal, assuming it is 2%; when the actual load rate a of the gas turbine is 91%, the control device judges that it is between 90% and 95% range, select the upper limit of the range of 95% and then 2% ahead, that is, select 97% as a reference to calculate the outlet pressure value of the supercharger. Such as Figure 4 The actual operating curve of the supercharger shown, according to Figure 4 According to the corresponding relationship of the middle curve, the outlet pressure P2 corresponding to the supercharger is 3.416Mpa at this time.

Embodiment 3

[0053] When different actual load rates a are located in different intervals, the overshoot amounts corresponding to different intervals are different.

[0054] The overshoot c is: c=a×K, the overshoot c has a linear relationship with the actual load rate a, the greater the actual load rate a, the greater the overshoot. The correction coefficient K is related to the pressure regulating station, unit characteristics and the actual gas pipeline layout of the gas turbine power plant. The specific value of the correction coefficient K can also be obtained by querying the empirical data table.

[0055] When the actual load rate a of the gas turbine is 91%, if K is 0.011 obtained from the table lookup, it is calculated as follows:

[0056] c=a*K=91%*0.011=1%

[0057] It can be obtained that the overshoot c is 1%, and the control device judges that 91% is in the range of 90%~95%, then select the upper limit of the range of 95% and then lead it by 1%, that is, select 96% as the refer...

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Abstract

The invention discloses a gas turbine supercharger pressure adjustment method and system. The specific adjustment steps of the system are: obtaining the target power of the gas turbine generator and the actual load rate corresponding to the target power of the generator; judging the actual load rate and the municipal pipe network The size of the pressure load rate. When the actual load rate is greater than the load rate corresponding to the pressure of the municipal pipe network, the gas from the municipal pipe network enters the supercharger and is boosted. The target pressure at the outlet of the supercharger is selected according to the actual load of the target power of the generator. The ratio is selected, and the part between the gas turbine load rate and the full load that can be satisfied by the incoming gas pressure of the municipal pipe network is divided into multiple intervals, and the actual load rate is determined. The upper limit value of the interval where the actual load rate is located plus a The overshoot is used as a reference coefficient, and the outlet target pressure of the supercharger is calculated according to the reference coefficient. Through the above method, the inlet pressure of the gas turbine can reach the required value in time and quickly, and the power consumption of the supercharger is reduced, which is economical and energy-saving.

Description

technical field [0001] The invention relates to the field of gas turbines, in particular to a method and system for regulating the pressure of a supercharger of a gas turbine. Background technique [0002] In the engineering design involving gas turbines, in order to ensure the demand of gas turbines for natural gas pressure under extreme working conditions, the power selection of the turbocharger is usually selected according to the maximum pressure ratio between the outlet pressure and the inlet pressure of the turbocharger. The pressure is the pressure of the pressure regulating station connected to the factory area by the municipal pipe network, which is usually a fixed value, and the outlet pressure of the supercharger is selected according to the maximum demand pressure of the gas turbine. [0003] However, the power of the turbocharger selected in this way is too high in most cases in the actual operation process, because gas turbines have the characteristics of rapid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02C9/28F02C9/30F02C9/40F02C7/22F04D27/00F02C3/22
CPCF02C3/22F02C7/22F02C9/28F02C9/30F02C9/40F04D27/004
Inventor 张俊广李建华陈军杨军闫恒
Owner 中国东方电气集团有限公司
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