sliding mode controller for single stage boost inverter

资 源 简 介

sliding mode controller for single stage boost inverter

详 情 说 明

Sliding Mode Control (SMC) is a robust control strategy well-suited for power electronic converters like the single-stage boost inverter. The boost inverter topology integrates both DC-DC boosting and DC-AC inversion in a single conversion stage, making it compact but challenging to regulate due to nonlinear dynamics and load variations.

SMC excels in this application because of its inherent disturbance rejection and insensitivity to parameter uncertainties. The controller defines a sliding surface (often based on voltage or current tracking errors) and forces the system states to converge to this surface by rapidly switching the inverter’s active switches (e.g., MOSFETs/IGBTs). The high-frequency switching ensures robustness against input voltage fluctuations and load changes but requires careful design to avoid excessive chattering—a common issue in SMC that may increase losses.

Key considerations for implementation include: Sliding Surface Design: Typically derived from output voltage error and its derivative to ensure stability. Switching Law: Uses signum or saturation functions to minimize chattering while maintaining tracking precision. Boost Inverter Dynamics: The controller must account for the bidirectional energy flow and non-minimum phase behavior during step-up conversion.

Compared to linear controllers (e.g., PI), SMC offers faster transient response and better resilience, though it demands precise modeling of the system’s bounds. Advanced variants like higher-order SMC or adaptive SMC can further reduce chattering and improve efficiency.

This approach is particularly valuable in renewable energy systems, where input sources (e.g., solar panels) exhibit variability and the inverter must maintain a clean sinusoidal output under uncertain loads.