Method for monitoring and adjusting cylinder warming state during cold start of 50MW unit

Abstract

The invention discloses a method for monitoring and adjusting a cylinder warming state during cold start of a 50MW unit, belongs to the field of turbine operation state monitoring, and aims to solve the problem of defects of a monitoring means in the cylinder warming process during start of a 50MW turbine in the prior art. The method comprises the steps that new temperature measuring points are supplemented on the basis of typical temperature measuring points so as to represent temperature field distribution of a steam turbine cylinder body; measuring point temperatures of the typical temperature measuring point and the supplementary temperature measuring point are collected and transmitted in real time, and the collected temperatures of the measuring points are displayed on a monitoring display screen in different colors from low temperature to high temperature; and in the warming-up process, the parameters of the heating steam are adjusted in real time according to the difference between the temperature of each measuring point and the temperature of the heating steam so that cylinder warming-up self-adaptive adjustment is realized. The method is used for monitoring the cylinder warming state in real time when the steam turbine is started.

Description

technical field [0001] The invention relates to a method for monitoring and adjusting the state of a warm cylinder when a 50MW unit is started in a cold state, and belongs to the field of monitoring the operating state of a steam turbine. Background technique [0002] 50MW small-capacity steam turbines and 300MW and other large-capacity units have great differences in cylinder structure. Taking the EHNG71 / 63 / 160 units produced by Hangzhou Steam Turbine Factory as an example, the mode of steam heating and warming cylinders with fixed parameters is shown in detail. Table 1: [0003] Table 1 Common schemes of the original warm-up [0004] Scheme and parameters steam pressure steam temperature maintain pressure in the cylinder cylinder target temperature Option One 91.0 bar 535℃ ≤9.8bar 220℃ Option II 33.0bar 394℃ ≤9.8bar 220℃ third solution 9.80bar 255℃ ≤5.2bar 220℃ Option four 50kPaA 81.3℃ ≤20kPaA 220℃ [0005]...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the existing defects in the monitoring means of the 50MW steam turbine in the process of warming the cylinder during start-up in the prior art, and to provide a method for monitoring and adjusting the state of the warm-up cylinder when the 50MW steam turbine is started in a cold state

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