An enhanced disturbance observer based control for DC-AC inverters using high-order sliding mode

Dai, Chao; Yang, Jun; Wang, Zuo; Li, Shengbo Eben

doi:10.1109/chicc.2016.7554729

Cited by 3 publications

(1 citation statement)

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“…To remove this restriction HOSMC has been proposed in which switching function is included in the higher order derivatives of sliding variables. 20 HOSMC has been implemented on the inverter system in Del Pizzo et al 21 and Dai et al 22 to get a continuous control signal by overcoming chattering phenomenon. Although HOSMC approach gives reasonable tracking performance but all of above approaches are designed through state feedback that needs complete information of the system parameters and system states.…”

Section: Introductionmentioning

confidence: 99%

Effective dynamic disturbance rejection scheme based on higher order sliding mode control for DC-AC inverter under load variation

Anjum

Husain

Aziz

et al. 2022

Measurement and Control

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In this paper, a dynamic super twisting sliding mode controller(ST-SMC) is proposed to resolve the problems associated with sudden load changes in AC-DC inverter system such that a high-quality output can be obtained. By developing a non-linear extended state observer (NLESO), both system states and lumped parameter disturbances are estimated and incorporated into controller design. This dynamic disturbance estimation and rejection algorithm not only increases the control loop reliability by eliminating the current sensor dependency, but it also allows the ST-SMC to be implemented with a small switching gain that minimizes the chattering effect. Optimal observer gain parameters design has been achieved by adopting the particle swarm optimization approach. The stability of the entire closed-loop system is proven based on the Lyapunov stability criterion. The effectiveness of the proposed dynamic ST-SMC algorithm has been validated in MATLAB Simulink environment where, the control strategy exhibit rapid dynamic response with a steady-state error of [Formula: see text]. The total harmonic distortion (THD) is also reduced to 0.02%[Formula: see text] and 0.08[Formula: see text]% for linear and non-linear loads, respectively.

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Section: Introductionmentioning

confidence: 99%