Improve LADRC Method for Disturbance Suppression: Application to Electrical-Load Interface in Microgrid

As the cornerstone of adjusting microgrid output, the electrical load interface unit is difficult to continuously output desired dynamics under various uncertainties. To handle the problem, an improve linear active disturbance rejection control (ILADRC) including total disturbance differential compensation is proposed for load interface unit. In this technology, the total disturbance differential is embedded in the traditional linear extended state observer (TLESO) to construct a modified LESO, alongside the control law is generated by a feedforward way. By doing this, the suppression capability of the system to generalized disturbances is improved, thereby optimizing output dynamics. Finally, comparative experiments are conducted on a 40-kW test platform, which validates correctness of the analysis and the superiority of the proposed approach.