Wide-band aggregated impedance modeling of multivariate new energy clusters in the frequency domain

How to establish an accurate wideband aggregation impedance model is the basis for achieving stability and wideband oscillation analysis of multi-element new energy cluster systems. To address this issue, this paper proposes a frequency-domain modeling method for wideband aggregation impedance of multi-element new energy clusters. Firstly, independent sequence impedance modeling is carried out for various power generation systems such as wind power generation system, photovoltaic power generation system, and energy storage device. Based on the above, the overall sequence impedance of the multi-element new energy cluster external transmission system is calculated through impedance analysis method. By comparing and analyzing the sequence impedance of the multi-element new energy cluster calculated by the method proposed in this article with the sequence impedance of the multi-element new energy cluster obtained by simulation, the results show that the method proposed in this article is effective and accurate.