Novel multi-rate electromagnetic transients simulation based on rotating transformation of coordinate and frequency reducing

• Published in: 13th IET International Conference on AC and DC Power Transmission (ACDC 2017) p. 75
• Main Authors: Shu-jun, Yao, Min-xiao, Han, Wang, Yan
• Format: Conference Proceeding
• Language: English
• Published: Stevenage, UK IET 2017; The Institution of Engineering & Technology
• Subjects: a.c. transmission; Alliances; Electronic devices; Lager; Phase transitions; Power convertors and power supplies to apparatus; Power electronics, supply and supervisory circuits; Power engineering computing; Power system management, operation and economics; Rotation; Systems simulation; Transmission lines; lager-scale power systems simulation; transmission line travel wave; ac network; EMTP; frequency reducing; power system simulation; power transmission; rotating transformation; power electronics; single phase coordinate; electromagnetic transients program; power electronic devices; multirate electromagnetic transients simulation
• ISBN: 9781785614217; 1785614215
• DOI: 10.1049/cp.2017.0075

The traditional Electromagnetic Transients Program (EMTP) is very slow for the lager-scale power systems simulation due to the small time step. To accelerate the EMTP simulations speed, a novel multi-rate method is proposed. This method is based on the rotating transformation of single phase coordinate and frequency reducing. The part of power electronic devices is simulated with a small time step, and the part of ac network is simulated with a large time step. The interface between the part of small time step and the part of big time step is realized based on the property of transmission line travel wave. The validity and efficiency of the proposed method is verified by simulating cases.