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Gas compressor on-line characteristic analysis method based on temperature control function of gas turbine

A gas turbine and characteristic analysis technology, applied in the field of electric power industry, can solve the complex problems of gas turbine parameters and characteristics of variable working conditions, etc.

Inactive Publication Date: 2013-09-11
SHENZHEN GUANGQIAN ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the adjustable guide vane opening degree IGV participates in the automatic control of the gas turbine, the research on the parameters of the gas turbine components and the characteristics of variable working conditions becomes complicated.

Method used

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  • Gas compressor on-line characteristic analysis method based on temperature control function of gas turbine
  • Gas compressor on-line characteristic analysis method based on temperature control function of gas turbine
  • Gas compressor on-line characteristic analysis method based on temperature control function of gas turbine

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Embodiment Construction

[0055] The specific implementation will be described below by taking a 270MW gas turbine with IGV temperature control of the inlet manifold flow section of the compressor as an example.

[0056] (1) Analyze the rationality of the differential pressure data of the compressor intake manifold.

[0057] Arrange the differential pressure Dp data of the compressor intake manifold according to the IGV opening of the compressor intake manifold flow section from low to high, analyze its distribution, and draw the conclusion that some unreasonable data need to be eliminated.

[0058] Reasonable steps to identify manifold static pressure data are:

[0059] ① According to the original sample (or new sample), fitting Dp (1) =F(IGV,t a ), called the first discriminant.

[0060] Dp (1) =(5.0426×10 -5 IGV 3 -1.1342×10 -2 IGV 2 +2.6784IGV+185.58) / (t a +273.15)

[0061] ② Eliminate unreasonable data in the original sample (or new sample), that is, |Dp-Dp (1) | / Dp (1) ≥5% of the data...

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Abstract

The invention relates to a gas compressor on-line characteristic analysis method based on the temperature control function of a gas turbine. The method is characterized by comprising the following steps: 1) performing rationality analysis on the differential pressure data of the intake manifold of the gas compressor and getting rid of some irrational data; 2) working out the air mass flow of the gas compressor according to the data sample acquired in step 1) and the size of the side section of the intake manifold, measuring and calculating the operating performance of the gas turbine by combining the data communication system (DCS) data, and adopting the operating data with small relative error as the modeling sample; 3) establishing a variable working condition model of the gas compressor comprising 3-1) establishing a temperature control rule model for the inlet guide vane (IGV) of the side section of the intake manifold of the gas compressor of the gas turbine; 3-2) establishing a pressure ratio model of the gas compressor; 3-3) establishing a flow model of the gas compressor; 3-4) establishing an intake resistance model of the gas compressor; and 3-5) establishing a gas compressor efficiency-flux characteristic curve based on the temperature control rule for the IGV of the side section of the intake manifold of the gas compressor. According to the invention, the air mass flow entering the gas compressor is limited through adjusting the blade angle of an adjustable guide vane, so that the purposes of protecting safe operation of the unit and improving the operating efficiency are realized.

Description

technical field [0001] The invention relates to an online characteristic analysis method of a gas compressor based on the temperature control of a gas turbine, which is suitable for analyzing the characteristics of a typical compressor variable working condition of a heavy-duty gas turbine. It belongs to the technical field of electric power industry. Background technique [0002] In the prior art, since the gas turbine is often in a state deviated from the design working condition in actual operation, it is essential to calculate the variable working condition characteristics of the compressor to establish its simulation model. However, the heavy-duty gas turbine used in the electric power industry has a large compressor flow rate, many stages, and a high pressure ratio. There are many factors affecting the performance of the compressor itself, which brings difficulties to the calculation of the characteristic model of the compressor. [0003] In order to obtain the data o...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 杨承邓永马晓茜
Owner SHENZHEN GUANGQIAN ELECTRIC POWER
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