In order to improve the calculation efficiency of electromagnetic transients in power systems,a high-precision large-step integral LSD algorithm was proposed.First the state-space expression describing the electromagnetic transient phenomenon of power system was transformed into a first-order constant coefficient differential equation system through matrix operation,which was then solved by using the LSD integral algorithm.Finally an electromagnetic transient calcula-tion applying the proposed algorithm to transmission lines and large power transformer windings was conducted.The sta-bility of the algorithm was found to have no relationship with simulation time step,thereby large steps could be used to perform numerical calculations to improve calculation efficiency.Compared with the CDA algorithm of small step size cal-culation,the proposed one achieved suppressed numerical oscillation to a certain extent while maintaining accuracy.
electromagnetic transientLSD algorithmsystem of differential equations with constant coefficientsCDA algorithm
NETL
NSTL
万方数据
