US 11,668,760 B2
Optimization method, unit, and electronic device of shifted frequency (SF)-based electromagnetic transient simulation
Shilin Gao, Beijing (CN); Ying Chen, Beijing (CN); Shaowei Huang, Beijing (CN); Chen Shen, Beijing (CN); and Zhendong Tan, Beijing (CN)
Assigned to Tsinghua University, Beijing (CN)
Filed by Tsinghua University, Beijing (CN)
Filed on Jun. 21, 2021, as Appl. No. 17/353,529.
Claims priority of application No. 202110350904.7 (CN), filed on Mar. 31, 2021.
Prior Publication US 2022/0334194 A1, Oct. 20, 2022
Int. Cl. G01R 31/42 (2006.01); G01R 23/12 (2006.01); G01R 31/40 (2020.01); G05F 5/00 (2006.01)
CPC G01R 31/42 (2013.01) [G01R 23/12 (2013.01); G01R 31/40 (2013.01); G05F 5/00 (2013.01); H02P 2209/00 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An optimization method of a shifted frequency (SF)-based electromagnetic transient simulation, comprising:
determining a current amplitude and a voltage frequency according to a node voltage and a branch current calculated by an SF-based electromagnetic transient simulation device based on a shifted frequency at a current time step, wherein the SF-based electromagnetic transient simulation device comprising a memory storing an existing program for SF-based electromagnetic transient simulation and a processor;
determining an optimal shifted frequency of the current time step based on the current amplitude and the voltage frequency, which comprises determining the optimal shifted frequency of the current time step by using a minimum error between a measured analytic signal response, determined by the current amplitude and the voltage frequency, and a theoretical analytic signal response, determined by the current amplitude and the voltage frequency, as a constraint; and
updating the shifted frequency by adopting the optimal shifted frequency of the current time step, wherein updated shifted frequency is used by the SF-based electromagnetic transient simulation device for calculating a node voltage and a branch current at the next time step.