Dynamic Characteristic Enhancement of Interleaved Parallel Boost based on High Order Extended State Observer

Interleaved parallel DC/DC converters are widely used because of their advantages such as low current ripple and high output power. The model predicted control performance depends on the system parameters and is not suitable for the complex operating conditions of interleaved parallel converters. In order to solve the problem that the traditional model-free control based on differential method requires high sensor accuracy, this paper proposes the model-free predictive control based on high-order extended observer. The ultra-local model of the interleaved parallel Boost converter is firstly established. Higher-order extended observer is used to observe the dynamic part of the model to improve the anti-interference ability of the system. Experiments demonstrate that the proposed method has good dynamic response.