Computation and Analysis of Power System Connected to Distributed Generation Based on Harmonic Balance Method

Based on the harmonic balance method, IEEE 9-node network with renewable energy access is established as an example for the computation and analysis of the harmonic power system. The periodic state variables are expanded in the form of a complex Fourier series to generate the harmonic balance matrix equation. The calculation results are compared with the simulated results to verify the effectiveness and accuracy of the proposed method. Harmonic indicators of each node in the power network are analyzed deeply, and the relevant feature of harmonic content distribution with a wind generation connected to grid is obtained.