HMN steam turbine X-criterion constant value real-time comparison system based on TSE stress estimation

Abstract

The invention discloses an HMN steam turbine X-criterion constant value real-time comparison system based on TSE stress estimation. The system comprises a process device, the process device comprises a control cabinet AP, an expansion cabinet, a power supply cabinet, a relay cabinet and a cable box, the control cabinet AP is connected with a plurality of engineer stations, an application server and an OPC server through Automation Highway, and the application server and the OPC server are connected with a plurality of operator stations and diagnosis stations through Application Highway. According to the system, current constant value and target value are output on a TSE control picture and are compared with the target value in real time, the larger the absolute value of the difference value between each constant value and the target value is, the larger the margin is, a watch keeper can clearly know the range of each X-criterion control constant value and the margin, and therefore, fine operation and parameter control of the watch keeper are greatly facilitated, vehicle flushing parameters can be selected more reasonably, warming time can be arranged more reasonably, starting time is saved, and use is convenient.

Description

technical field [0001] The invention relates to the technical field of steam turbines, in particular to an HMN steam turbine X-criterion fixed value real-time comparison system based on TSE stress estimation. Background technique [0002] Siemens 660MW subcritical HMN steam turbine takes the various limits generated by the thermal stress conditions of the steam turbine as the continuous criterion (X-criterion) to control the startup of the steam turbine, and the thermal stress must be kept within the specified limit to ensure the service life of the steam turbine and rotor . When the operating state changes, the parameters of the steam entering the steam turbine and the corresponding heat transfer will also change. In order to limit the stress, the adjustable temperature criterion X-criterion is used to judge whether the unit can accept the change of the operating mode, and send it to the control of the steam turbine as a start-up condition The functional group SGC, SGC con...

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Problems solved by technology

[0003] When the steam turbine is in use, the X-criteria setting value at each stage changes at any time according to the main reheat steam parameters, high and medium pressure shaft temperature, and the cylinder temperature. There are watchmen who are not clear about the corresponding X-criteria setting values ​​at each stage, so they need to check the drawing of the regulations or the internal query in the background Data, steam parameters at each stage, and warm-up time are not properly controlled, the control method is lagging, and the start-up control strategy has a breakpoint, resulting in a long start-up time of the unit and a large amount of fuel consumption. Therefore, we propose the HMN steam turbine X-criteria based on TSE stress estimation. Fixed value real-time comparison system to solve the problems mentioned above

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