超临界热电联产机组励磁系统实测及仿真研究

Research on Measuring and Modeling of Excitation System in Supercritical Cogeneration Unit

准确建立大型机组的励磁系统数学模型是电力系统安全稳定计算中的关键问题。在分析超临界热电联产机组励磁系统结构控制原理的基础上,建立了励磁系统各环节的数学模型,以国电肇庆热电1号机组A级检修试验为例,对励磁系统进行了波形录制实验,利用仿真程序仿真校核了该励磁系统数学模型,从而验证了该励磁系统数学模型的有效性。仿真实验结果表明,构建大型热电联产机组励磁系统的数学模型可以有效地帮助完成电力运行、检修、规划和管理工作,从而为未来大电网建设提供一定的借鉴价值。

Accurately building the excitation system mathematical model of large units is the key issue in the security and stability calculation of power systems.Based on the analysis of supercritical cogeneration excitation control principle on the basis of system structure,this paper establishes the mathematical model of each section of the excitation system.Taking the maintenance test of Guodian Zhaoqing thermoelectric unit 1 grade A as an example,the waveform recorded experiment is carried out for the excitation system,which is simulated and testified by using the simulation program mathematically.Then the validity of the excitation system mathematical model is verified.The simulation experimental results show that it is very useful to build the mathematical model of the excitation system in large cogeneration units and could effectively help the power system operations,maintenances,planning,and management works.Therefore,it could also provide some references for the future construction of power grids.