NON-LINEAR H_∞CONTROL OF HVDC

On the basis of direct feedback linearization and H_∞ control theory, a supplementary controller for HVDC in integrated AC-DC power transmission system is resear- ched, a non-linear robust control model for two-area system containing the AC-DC tie-line is established and its control method is obtained by H_∞ control theory and Matlab software. Analytical results show that using the presented method the robustness of control system and the stability of AC power transmission system are improved.