超超临界机组凝结水节流负荷调节的建模与仿真  

Modeling and Simulation for Ultra Supercritical Units Load Regulation by Condensate Throttling

作　　者：谷俊杰[1] 王鹏[1] 

机构地区：[1]华北电力大学能源动力与机械工程学院,河北保定071003

出　　处：《系统仿真学报》2015年第12期2920-2926,共7页Journal of System Simulation

基　　金：河北省教育厅科学研究指导性项目(z2007414)

摘　　要：给出了超超临界机组凝结水流量与负荷的动态模型:利用容积守恒,质量守恒和能量守恒方程,进行推理和简化,建立两者之间的动态模型,为电厂实行凝结水节流与负荷控制提供理论依据。以某电厂1 000 MW超超临界机组为例,根据热平衡图及结构参数,对模型进行仿真。结果表明:在额定工况下,改变不同的凝结水流量,可得到对应的凝结水流量与负荷的传递函数的增益系数和时间常数;在不同工况下,随着负荷的增大,增益系数是变大的,而时间常数是变小的。Dynamic model of the condensate flow and load of ultra supercritical units was given. Reasonable inference and simplified were made by the conservation of volume, conservation of mass and conservation of energy and dynamic model of the condensate flow and load of supercritical units was offered, which could provide theoretical basis for the implement of the power plant condensate throttling and load control. Taking a 1000 MW ultra supercritical unit as an example, simulation of the model was made and compared. Results show that the gain coefficient and the time constant of the transfer function of the condensate flow and load can be regulated by changing different amount of condensate flow at the rated working condition; in different working condition, the gain coefficient is larger with the increase of load, but the time constant is shorter.

关 键 词：超超临界 凝结水节流 动态模型 热平衡图 仿真 

分 类 号：TM621[电气工程—电力系统及自动化]