Frequency tracking sampling scheduling method for relay protection real-time digital twinning

According to the relay protection real-time digital twinning frequency tracking sampling scheduling method, a low-frequency filter LFP, a period measurement module, a trigger signal generation module INT, a sampling interpolation module SMP, an array forming module ARR and a protection algorithm module PROT are included. According to the method, the frequency change of a power grid is actually measured, a sampling trigger signal is generated according to the frequency change, a primary system sampling value is interpolated under the condition that the RTDS is fixed in sampling step length, multiple basic requirements of twinning protection are met, meanwhile, the calculated amount can be reduced, algorithm modification is not needed, spectrum leakage is avoided, algorithm scheduling is simulated, and the twinning protection efficiency is improved. And the method can be used for twinborn protection of different points. 一种继电保护实时数字孪生的频率跟踪采样调度方法包括：低频滤波器LFP、周期测量模、触发信号生成模块INT、采样插值模块SMP、数组形成模块ARR和保护算法模块PROT。该方法实测电网频