Steam turbine steam distribution curve optimization method based on dynamic data

Abstract

The invention discloses a steam turbine steam distribution curve optimization method. By collecting historical data of a steam turbine in the variable load process, deleting discrete points and bad points through a data cleaning algorithm and clustering related parameters through a data clustering algorithm with the unit load as the mass center dividing basis, steam parameters and valve instructions under different load working conditions are obtained; then, by modifying main steam under different load working conditions according to a flow modifying formula, the main steam flow under the samesteam parameters is obtained; and finally, by performing linearization fitting on the steam flow and main valve instructions through a least square fitting algorithm and modifying a valve steam distribution curve in combination with the relationship between the original flow and the valve instructions, the optimized steam turbine steam distribution curve is obtained.

Description

technical field [0001] The invention belongs to the technical field of steam turbine operation optimization, and relates to a steam turbine steam distribution curve optimization method based on dynamic data. Based on the dynamic working condition data of the unit, through data cleaning, cluster analysis and steam flow correction and other technologies, the linearity of the steam distribution curve of the steam turbine is optimized, which can effectively improve the dynamic adjustment performance of the steam turbine, improve the unit load control accuracy and primary frequency regulation Control quality. Background technique [0002] With the massive access of new energy such as wind energy and solar power, in order to ensure the stability of grid load and frequency, and to stabilize the impact of random fluctuations on grid security, conventional coal-fired generators need to frequently participate in grid peak regulation and frequency regulation. In the middle, the contro...

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Problems solved by technology

[0003] The load control of the unit is usually completed by the digital electro-hydraulic control system (DEH system). The linearity deviation of the valve flow characteristic curve of the DEH system is too large, which will not only increase the response time of the unit to the load, but also easily cause high-speed regulation during the rapid adjustment process. The frequent vibration of the door will lead to poor adjustment speed and adjustment accuracy performance of the unit load, fluctuation of main steam parameters, and increased fatigue damage of the valve actuator, which will affect the assessment indicators of the two detailed rules of the power grid, which is not conducive to the safe and economical operation of the unit

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