A Method for Analyzing Flow Characteristics of Steam Turbine Valves

Abstract

The invention discloses a steam turbine valve flow characteristic analysis method based on ASCA and RBF neural network models, which applies historical data to the discovery of valve flow characteristics, and applies the neural network to the prediction of the pressure of the regulating stage of the steam turbine, so that no running test is required The single-valve flow characteristic curve of the high-pressure regulating valve of the steam turbine is obtained as follows.

Description

technical field [0001] The invention relates to a steam turbine valve flow characteristic analysis method based on an ASCA and RBF neural network model. Specifically, the invention can realize a historical data-driven steam turbine high-pressure regulating valve (abbreviated as a high-profile valve) flow characteristic calculation method, and belongs to the field of steam turbine control. Background technique [0002] The valve flow characteristic curve of the steam turbine regulating system is the corresponding relationship between the opening of the steam inlet regulating valve of the steam turbine and the steam flow through the valve. In the production process, after the steam turbine runs for a long time or the high-profile door is disassembled and overhauled, the flow characteristics of the high-profile door will change, which will deviate from the original flow opening correction function of the high-profile door. If the valve flow characteristic curve of the steam tur...

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Problems solved by technology

If the valve flow characteristic curve of the steam turbine regulating system differs greatly from the actual valve flow, problems such as sudden change in load and slow adjustment may occur when the unit changes load and frequency regulation, resulting in poor control performance of the unit, affecting the safety of the unit and variable load ability, in severe cases, it will cause severe vibration of the shafting of the steam turbine

In the sequence valve mode, if the setting of the overlapping degree of the regulating valve is unreasonable, it will also affect the economic efficiency of the sequence valve of the unit

[0003] To measure the flow characteristic curve of the steam turbine valve, the flow characteristic test of the steam turbine valve is required, but the traditional test method is more complicated to operate, takes a long time, and is easy to affect the operation of the unit, while the commonly used optimization calculation method has low efficiency and poor accuracy

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