Quantization method for deterioration degree of steam turbine

Abstract

The invention discloses a steam turbine degradation degree quantification method, which comprises the following steps: firstly, acquiring historical operation parameters of a steam turbine and historical vibration parameters corresponding to the historical operation parameters to form a sample parameter set, and dividing the sample parameter set into a training parameter set and a verification parameter set; wherein the operating parameters at least comprise the rotating speed of the steam turbine; secondly, constructing a vibration parameter regression model, and training and optimizing the vibration parameter regression model by using the training parameter set and the verification parameter set to obtain a vibration prediction model; thirdly, inputting the acquired to-be-measured operating parameters of the steam turbine into the vibration prediction model to obtain a vibration prediction value; and finally, calculating a vibration prediction deviation according to the vibration prediction value and the vibration actual value, and determining the degradation degree of the steam turbine according to the vibration prediction deviation. According to the quantification method, the deterioration degree of the steam turbine can be accurately quantified, and then the steam turbine can be conveniently maintained and repaired.

Description

technical field [0001] The invention belongs to the technical field of steam turbine deterioration quantification, and particularly relates to a method for quantifying the deterioration degree of a steam turbine. Background technique [0002] During the operation of the steam turbine unit, there will be gradual or rapid deterioration, which may have a potential impact on the constant speed and grid connection of the steam turbine unit, especially for large units, such as thermal power plant steam turbines, heating units, etc. Moreover, since the unit is in operation for a long time, it is often difficult to determine the degree of deterioration, especially when the vibration of the steam turbine unit fluctuates significantly with the operating conditions, it is even more difficult to quantify the degree of deterioration. SUMMARY OF THE INVENTION [0003] In view of the above problems, the present invention discloses a method for quantifying the degree of deterioration of a...

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Problems solved by technology

Moreover, since the unit is in operation for a long time, it is often difficult to determine its degree of deterioration, especially when the vibration of the steam turbine unit fluctuates significantly with the operating conditions, it is even more difficult to quantify the degree of deterioration

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