汽轮机高压旁路系统电液比例阀非线性仿真及分析

摘要

Non-line mathematical model of steam turbine high pressure valve control system was established through studying control system of steam turbine high pressure valve, analyzing prime control element-control characteristic of electro-hydraulic proportional valve, and considering saturated, hysteresis and dead zone and other major non-linear factors of proportional valve. Furthermore, the corresponding PID control tactics were put forward to revise the effects on system. It was simulated and analyzed of the electro-hydraulic proportional valve for steam turbine high pressure valve control system followed PID parameters calibration and based on non-line module of MATLAB/Simulink. The results show that the output response of the cylinder is more rapid and stable, and the technical requirements are met.%以汽轮机高压旁路控制系统为研究对象,通过分析控制系统的主要控制元件——电液比例换向阀的控制特性,考虑比例阀存在的饱和、滞环、死区等主要非线性因素,建立起汽轮机高压旁路控制系统的阀控缸非线性数学模型,并运用PID控制算法参数整定,对系统进行校正.基于MATLAB/Simulink控制系统的非线性模块,对PID参数整定后的汽轮机高压旁路系统电液比例阀非线性模型进行仿真和分析,结果表明系统响应快速,稳定性良好,达到控制标准要求.