摘要
在汽轮机等动力系统的仿真中，容积环节的处理及其计算稳定性是一个普遍遇到的问题。该文论述了在一定情况下采用基于质量和能量守恒的压力和焓微分方程组作为容积环节仿真模型的必要性，并针对因个别小容积环节动态响应较快给系统仿真步长造成限制的问题，给出了一个由直接积分导出的仿真递推式。该算式能允许采用较大的步长对容积环节进行仿真运算。对某汽轮机系统的实际仿真结果表明，采用该算式处理这类容积环节的仿真计算，能有效地避免因小容积动态响应快而造成计算结果的不稳定。
Abstract How to deal with volume components and their stability in calculation are problems universally met with in power system simulations.The paper explains the necessity,under certain conditions,of making use of a set of pressure and enthalpy differential equations,which meet mass and energy conservation requirements for simulation volume components,and discusses time step limits caused by the swift dynamic response of indiviual small volume components.A numerical simulation solution is derived by direct integration.With this solution simulation calculation of volume components may proceed with larger time steps.Simulation calculation of a certain concrete steam turbine system shows that,by treating such volume components with this formula non convergence caused by swift dynamic response of small volume components can be avoided.
出处
《动力工程》
CSCD
1998年第2期75-78,82,共5页
Power Engineering
