Photovoltaic grid-connected electromechanical transient simulation device

The embodiment of the invention provides a photovoltaic grid-connected electromechanical transient simulation device which comprises a phase-locked loop, a coordinate system transformation module andan MPPT module. The output end of the coordinate system transformation module is connected with the input end of the phase-locked loop. The output end of the phase-locked loop is connected with the input end of the MPPT module. The coordinate system transformation module is used for inputting the q-axis component of the voltage into the phase-locked loop. The phase-locked loop is used for outputting the inclined angle between the q-axis and the x-axis after the q-axis component of the voltage is subjected to the proportional integration process and the amplitude limiting process. The MPPT module is used for taking the included angle as the phase angle of the inverter control link. The inclined angle between the q-axis and the x-axis is outputted after the q-axis component of the voltage issubjected to the proporti