节流调节型汽轮机高压转子外表面温度预测方法

Prediction Method of High Pressure Rotor Outer Surface Temperature for Throttle-type Steam Turbines

介绍了一种节流调节型汽轮机高压转子外表面温度的预测方法。用汽轮机发电机组电功率、主蒸汽温度、主蒸汽压力、高压缸第1级抽汽压力和高压缸排汽压力作为输入值,采用了支持向量回归机(SVR)来计算出相应部位的汽轮机高压转子外表面温度。本方法针对了现有技术的不足,可用于判断相应部位的汽轮机内缸内壁安装的测温元件是否正常。如果汽轮机内缸内壁测温元件一旦异常,可通过本方法的预测值来代替高压转子外表面温度。提高了汽轮机热应力监控系统的可靠性,为汽轮机高压转子的热应力优化控制和汽轮机变负荷运行的安全性提供了技术保障。

Introduced the method for predicting high pressure rotor outer surface temperature for throttle -type turbine.Steam turbine electric power generators , main steam temperature , main steam pressure , high-pressure cylinder Level 1 extraction pressure and high-pressure cylinder exhaust steam pressure as input values , using a support vector regression （ SVR ） to calculate the external surface temperature of the corresponding parts of the high pressure turbine rotor .The method for the deficiencies of the prior art ,can be used to determine whether the corresponding parts of the cylinder wall temperature of the turbine internal components properly .If the turbine cylinder wall temperature measurement devices once abnormal , the predicted values can be used instead of the outer surface temperature of the high pressure rotor .Improve the reliability of the turbine thermal stress monitoring systems ,the method provide technical support for turbine thermal stress optimal control of the high-pressure turbine rotors and safety of variable load operation .