电力系统动态等值的在线测辨研究(Ⅱ)——辨识方法及仿真检验

动态等值的同调等值法和模式等值法大都用于离线分析，在线动态安全分析常需要对外部系 统作在线的实时动态等值。由于系统的结构、运行工况多变，一般不可能离线先作等值后 再在线调用。因此，在可辨识性分析的基础上，引进全局性好、鲁棒性强的进化策略辨识方 法用于电力系统动态等值的在线测辨。华中电网的实际仿真应用表明：进化策略法具有较高 的精度和较少的计算量，适合于动态等值参数辨识。

ON-LINE IDENTIFICATION OF POWER SYSTEM DYNAMIC EQUIVALENT Part Two Parameter Estimation & Simulation

By reason of needing to know system structure and parameters of the equivalent system, Coherency method andmode method are mainly used for off-line dynamic equivalent and not suitable for on--line dynamic equivalent. Just so, fmethod not needing system parameters is worth studying. This paper proposes an evolutionary strategy algorithm with globaconverge performance and robustness for the parameter estimation based on the identifiability analysis to dynamic equivalenlmodel in original part (Part One). It is shown by the case studies of Huazhong Power Network to be suitable for parametet of the dynamic equivalent model.