Multi-dimensional impedance measurement method based on active broadband

The invention discloses a multi-dimensional impedance measurement method based on an active broadband, and relates to the field of impedance measurement, and the method comprises the following steps: obtaining a binary sequence signal with the maximum length in a pseudo-random binary sequence; superposing a plurality of binary sequence signals with the maximum length as disturbance signals; the method comprises the following steps of: acquiring static phase angles of n VSC system sides by setting a PLL (Phase Locked Loop) with a natural frequency as a working frequency at an input end, and respectively injecting 2n groups of linearly independent disturbance signals into d axes and q axes of n VSC systems; performing park conversion on the three-phase voltage and the three-phase current measured by the n ports in the VSC system; performing FFT (Fast Fourier Transform) on the data obtained by park transformation to obtain phasor values under various frequencies; and calculating the impedance value of each frequ