Comparative Study of Different Switching Surfaces for Sliding Mode Control of a 40 kVA Single-phase UPS Inverter

Abstract

Abstract-In this paper, the effect of switching surface on sliding mode control of a single phase inverter is studied. Capabilities of three switching surfaces in chattering elimination, THD reduction and steady state error improvement are compared. The performance of these switching surfaces has been investigated through simulation. Simulation results show that after chattering improvement by adding first integral term, adding second integral term is not advisable.

Robust Stable Control Design for AC Power Supply Applications

“…The singularity can be solved by using the modified control technology shown in (8); nevertheless, the parameter Ω that exists in (5) is frequently more than or equal to the interference |H|. The sliding control term of the classic FTCC is replaced by (9) and (23). Under the circumstance of the unknown upper bound of the parameter uncertainties and the external disturbances, the feedback gain of the over-conservatism may generate a large chattering in the classic FTCC.…”

“…A discrete-time H-infinity controller is proposed for uninterruptible power supply systems to achieve a nearly zero steady-state error and a mitigate output-voltage distortion caused by non-linear loads. However, this controller is in need of the sophisticated algorithm [23]. Consolidating a mu-synthesis method into the H-infinity controller has attempted to control the islanded micro-grid so that the effects of the parametric uncertainties and external perturbations can be minimized.…”