1000MW汽轮机滑压优化试验研究及应用

Experimental Research & Application of Sliding Pressure Optimization for 1000-MW Steam Turbines

上汽-西门子1000MW汽轮机采用全周进汽滑压运行,为满足AGC快速负荷响应的要求,高压调门通常留有较大的机组负荷调节余量,使机组变负荷运行时,高压调门节流损失较大,对机组运行经济性造成不利影响。介绍了通过高精度试验对上汽-西门子1000MW汽轮机滑压运行方式进行优化的方法,得出了兼顾机组运行经济性和实际可控性的滑压曲线,并对各种影响因素进行了分析,同时提出了滑压曲线的实用修正方法,可为同型汽轮机运行方式优化提供借鉴。

Sliding pressure operation with full arc admission is designed as the usual operating mode for STC-Siemens 1 000-MW steam turbines.To meet the requirements of the AGC fast load response,a wide margin is usually left by the turbine control valves for load regulation,which causes considerable throttling losses to the valves,unfavorable for the unit's economic operation during load variation.This paper describes the method of optimizing the sliding pressure operating mode for the STC-Siemens 1 000-MW steam turbines by means of high precision tests.A sliding pressure curve taking account of both economic efficiency and controllability is obtained and the affecting parameters are analyzed.Meanwhile a practicable method of correcting the sliding pressure curve is put forward,which could be a reference for operation optimization for the same type of turbines.