Research Progress of Interrelationship Between Multi-time-scale Modeling and Algorithm of Power-electronized Power System

Multi-time-scale analysis of power-electronized power systems is fundamentally different from traditional single-time-scale research. In addition to building the multi-time-scale model, the algorithm must be considered in the modeling process, which means that models and algorithms cannot exist alone. In this way, the multi-time-scale characteristics of the power-electronized power system can be described accurately. Based on the concept of multi-time-scale analysis, this paper summarizes the current research of the interrelationship between the multi-time-scale modeling and algorithm of the power-electronized power system. So, the current multi-time-scale algorithms and their application ranges are first analyzed. Subsequently, based on the criterion that the same mathematical model can be calculated with the same algorithm, the power-electronized power system is divided into four time scales: component mechanism scale, switching system scale, electromagnetic transient scale and electromechanical transient scale. Then, through the correlation between different time-scale models, the natures of multi-timescale models are discussed, and the interrelationships between multi-time-scale models and algorithms are clarified. Finally, problems to be solved and research prospects in multi-time-scale modeling and algorithm of the power-electronized power system are proposed. © 2021 Automation of Electric Power Systems Press.