Turbine flow curve identification and optimization method based on feature flow area

Abstract

The invention discloses a turbine flow curve identification and optimization method based on the feature flow area. The method comprises the following steps that A, multiple sampling measurement points are set, and real-time working condition data are collected; B, vacant working condition data and abnormal working condition data are cleared; C, the real-time working condition data of multiple sampling periods with the output power value, main steam pressure value and total valve position value continuous and stable are selected, and various parameters are subjected to equalization processing ; D, a target data set is mined through a K-medoids algorithm; E, a turbine control valve set flow feature curve under the specific main steam pressure is identified based on the feature flow area; and F, a turbine control valve set flow feature curve under the rated main steam pressure is extracted, and sections with unreasonable linearity are analyzed and optimized. The actual flow feature curve of a turbine control valve set under the specific main steam pressure can be identified and optimized, so that the set curve of the flow feature of the control valve set and the actual curve are consistent, and safe and stable operation of a turbine unit is ensured.

Description

technical field [0001] The invention relates to the technical field of steam turbine power generation, in particular to a steam turbine flow curve identification and optimization method based on a characteristic flow area. Background technique [0002] Steam turbine is the most widely used prime mover in modern thermal power plants, and the flow characteristic curve of its regulating valve group is determined according to the original design. In overhauled units, it often happens that the flow characteristic setting curve of the regulating valve group is inconsistent with the actual curve. As the main actuator of the DEH system, the steam turbine valve group is the main actuator of the DEH system. If the deviation of its flow characteristics is too large, the throttling loss of the steam turbine will increase, the response load of primary frequency regulation will be insufficient or too large, the AGC response will be slow, and the valve switching load will fluctuate. The s...

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Problems solved by technology

[0002] Steam turbine is the most widely used prime mover in modern thermal power plants, and the flow characteristic curve of its regulating valve group is determined according to the original design. In overhauled units, it often happens that the flow characteristic setting curve of the valve group is inconsistent with the actual curve

As the main actuator of the DEH system, the steam turbine valve group is the main actuator of the DEH system. If the deviation of its flow characteristics is too large, the throttling loss of the steam turbine will increase, the response load of primary frequency regulation will be insufficient or too large, the AGC response will be slow, and the valve switching load will fluctuate. Safe and stable operation of the unit

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