A method for determining the off-line washing time of gas turbines in power stations
A technology for gas turbines and determination methods, which is applied in the direction of gas turbine devices, liquid fuel engines, mechanical equipment, etc., can solve the problems of unreasonable washing time and low utilization rate of equipment, achieve scientific and reasonable offline washing time, improve operating efficiency and enterprise The economic benefits, the effect of increasing enterprise benefits and market core competitiveness
Active Publication Date: 2020-12-22
HARBIN ELECTRIC CO LTD
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Problems solved by technology
[0005] Aiming at the defects of unreasonable washing time, low operating efficiency of the unit and low utilization rate of equipment in the existing washing method, the present invention provides a method of off-line washing time for gas turbines in power stations with reasonable washing time, which can fully improve the operating efficiency of the unit and the utilization rate of equipment. determination method
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Embodiment 1
[0049] combine figure 1 , figure 2 , image 3 with Figure 4-a This embodiment is described. In this embodiment, a method for determining the off-line water washing time of a power station gas turbine involved in this embodiment includes the following steps:
[0050] Step 1: Firstly, select the historical health data covering all working conditions of the gas turbine in the power station from the gas turbine power station database (such as the PI database), which is called set A. Among them, the gas turbine in the power station mainly determines the operating condition based on three factors: the power of the gas turbine, the ambient air temperature, and the calorific value of the fuel (such as natural gas). The historical health data include compressor inlet and outlet temperature and pressure, gas turbine power, ambient temperature, IGV valve opening and other types;
[0051] Step 2: When the unit transitions from one stable working condition to another stable working c...
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The invention discloses a determining method for offline washing time of a power station gas turbine, and belongs to the field of offline washing of power station gas turbines. With the determining method for the offline washing time of the power station gas turbine, the washing time is reasonable, and the unit operation efficiency and the equipment utilization rate can be increased sufficiently.According to the determining method for the offline washing time of the power station gas turbine, the set A covering all working conditions in the health state of the gas turbine is selected from a gas turbine power station database; the operating data set B is obtained through steady-state screening of the set A; a compressor reference pressure ratio model is established; the compressor reference pressure ratio model is trained by the aid of a data sample of the set C; the pressure ratio residual is calculated by the aid of a data sample of the set D; the upper limit value and the lower limit value of the pressure ratio residual are obtained with the kernel density estimation method; real-time monitoring data are brought into the compressor reference pressure ratio model, and the compressor reference pressure ratio and the interval are obtained; the real-time pressure ratio drop is calculated; the washing threshold value is set; and offline washing is performed in the corresponding time period. The method is mainly applied to determination of the offline washing time of the power station gas turbine.
Description
technical field [0001] The invention belongs to the field of off-line washing of gas turbines in power stations, and in particular relates to a method for determining the off-line washing time of gas turbines in power stations. Background technique [0002] Gas turbines in power stations need to continuously inhale air during operation. The air may contain dust, dust, insects, etc., which are continuously deposited in the compressor, resulting in a decrease in pressure ratio and efficiency, making the compressor prone to vicious accidents such as surge, and reducing the unit’s operating efficiency. Safety, reliability and economy. Therefore, the compressor must be washed offline with an aqueous solution containing detergent to ensure that the power and efficiency of the combined cycle unit are at a relatively high level. At present, the off-line washing of gas turbines in power stations is generally carried out regularly according to the length of their running time. Howeve...
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IPC IPC(8): F04D29/70F02C9/00
CPCF02C9/00F04D29/705F05D2270/70
Inventor 杨永明曲晓峰张德阳毛静轩姜漫利王兆光苗东旭翟俊鹏傅磊王克剑
Owner HARBIN ELECTRIC CO LTD