李博,曹敏,王恩,唐标,郑玲,王学伟.动态负荷准稳态与动态信号的模型与分解方法[J].电测与仪表,2020,57(5):14-19. Li Bo,Cao Min,Wang En,Tang Biao,Zheng Ling,Wang Xuewei.Model and Decomposition of Dynamic Load Quasi-Steady State and Dynamic State Signals[J].Electrical Measurement & Instrumentation,2020,57(5):14-19.
Model and Decomposition of Dynamic Load Quasi-Steady State and Dynamic State Signals
In this paper, for the high-power dynamic loads, such as traction substations, the quasi-steady state and dynamic state mathematical models of the dynamic load signal random process are first established. Then, based on the second empirical mode decomposition method, the dynamic load current and power random signals of the collected traction substation are decomposed on a small time scale. And the quasi-steady state of slow fluctuation and the dynamic state of random fast fluctuation are obtained. The decomposition results prove the correctness of the model structure and the effectiveness of the decomposition method. The method provides a basis for determining the dynamic error characteristic test signal of the energy meter.