在线监测中机组运行基准工况的确定

Determination Method of Base Operation Condition in On-Line Monitoring for Thermal Power Plant

分析了在电厂的在线监测系统中,将影响热经济性的因素分为可控因素和客观因素两大类,并寻求在当前客观因素所确定的条件下,机组运行基准工况的重要性。分析了汽轮机、热力系统及其主要辅机即凝汽器、加热器和给水泵的变工况特性,研究了机组负荷、环境温度改变时机组通流部分、各主要辅机中主要参数的变工况计算方法,利用电厂热力系统热经济性状态方程,得出了机组运行基准工况的确定方法。并以实际机组为例进行了计算。

In on-line energy conservation monitor system in thermal power plant, it is very important to divide the all factors affecting thermal economy into controlled factors and objective factors, and to determine the base operation of the present condition decided by the objective factors. It is analyzed that various operation characters of turbine, thermal system and its major auxiliary machines, that is condenser, heater and feed water pump. With plant load, atmospheric temperature varying, calculation method of every major parameters in turbine, every major auxiliary machines are studied. Using thermal economy state equation in thermal system, the determination method of base operation is given. An actual example is also given. Tables 4 and refs 6.