火电快速甩负荷机组动态仿真建模

快速甩负荷(FCB)技术是一种能够在电网黑启动中发挥关键作用的技术,而FCB机组动态仿真模型是研究FCB技术的基础。现有常规火电机组模型均无法准确模拟FCB工况的动态特性,为此在分析总结火电机组实现FCB功能所必需的各项技术的基础上,建立了含旁路系统的汽轮机模型以及含FCB功能的原动机调速系统模型,并加入锅炉、电力系统稳定器(PSS)、励磁系统及发电机模型组成含FCB功能的火电机组动态模型。以台山电厂FCB实验机组为例,通过Matlab/Simulink建立FCB机组的动态仿真模型,其仿真结果与现场实验结果基本一致,说明所建立的FCB机组动态模型能够准确地模拟机组在FCB工况下的动态特性,可为研究FCB机组和大旁路机组及其在电力系统的应用提供模型参考。

Dynamic Model for Thermal Units with Fast Cut Back Function

Fast cut back (FCB) technique plays an important role in power system black-start, and the detailed dynamic model of the FCB thermal unit is the fundamental of the FCB research. However, the current conventional thermal unit model cannot simulate the dynamics of FCB thermal unit accurately. Therefore, after analyzing the required techniques for the FCB function, this paper constructed thermal turbine model with a bypass system and prime mover model integrated a FCB function. After that, the complete dynamic model of FCB thermal units were built, including the turbine, prime mover, boiler, PSS, exciter and generator. A case study is undertaken based on the FCB thermal units in Taishan Power Plant through Matlab/Simulink software. The simulation results are consistent with field test results of the FCB thermal unit, which verify the proposed dynamic model. It can provide references to study FCB thermal units and other large bypass integrated units.