Extended State Observer Based Nonsingular Terminal Sliding Mode Control for Voltage Source Converter Station With Uncertain Disturbances

This paper proposes a generalized design procedure for the extended state observer (ESO) based sliding mode control voltage source converter (VSC) station. In this work, non-linear loads and external disturbances parameter perturbations of station is considered as an which are bounded. The ESO designed to reject include not only unmeasured system states but also modeling uncertainties. At same time, non-singular terminal (NTSM) method on proposed solve problems slow dynamic response output high waveform distortion rate in validated through numerical simulations shows closed-loop dynamics better transient performance, controller can effectively suppress differential peak values active power, reactive power DC initial stage start-up. Under conditions non-singularity controller, influence chattering eliminated robust performance enhanced.