Method for real-time estimation of commutation overlap angle of high-voltage direct current transmission

The present invention provides a method for real-time estimation of commutation overlap angle of high-voltage direct current transmission. The method comprises the steps of: using simulation softwareto perform network format electromagnetic transient simulation for an AC/DC parallel serial network, calibrating a moment corresponding to triggering pulses in the simulation data, for each moment, constructing feature vectors, collecting the difference of the actually measured commutation over-lapping angle after commutation actual triggering and a commutation over-lapping angle deduced by a quasi steady state model as a mark to construct a data set, segmenting a training set and a test set, and completing training work of an all connection BP neural network; and at an actual operation field,rapidly estimating the quasi-steady-state model error correction value of the commutation over-lapping angle by employing the trained BP neural network based on the information of a time window at 1ms prior to the commutation