Sensor Effects in LCL-Type Grid-Connected Shunt Active Filters Control Using Higher-Order Sliding Mode Control Techniques

Abstract

The effects of measuring devices/sensors on improving the power quality (PQ) of electric networks are studied in this paper. In this context, improving the performance of an LCL-type grid connected to a three-phase three-wire shunt active filter (SAF) in the presence of voltage perturbations is studied. In order to ensure the high-quality performance of LCL-SAF in the presence of voltage perturbations, the robust continuous second-order sliding mode controller (2-SMC), including twisting and super-twisting controllers, and continuous higher-order sliding mode controller (C-HOSMC)-based approaches are employed. These controllers, whose outputs are processed by pulse-width modulation (PWM), allow minimization of the phase shift and prevent the generation of discontinuous chattering commands, which can severely damage the VSI components. Moreover, an integration of a generalized instantaneous power identification algorithm with an advanced phase locked loop (PLL) was proposed and experimentally tested to validate the effective performances of SAF under severe perturbations. Additionally, the studied approaches were tested via simulations taking into account a conventional nonlinear industrial load in a real textile factory environment, using measurements provided by power quality analyzers. Finally, the effects of the measuring devices, including the current and voltage sensors, on the accuracy and reliability of the SAF and, consequently, on the PQ of the electric power grid were studied via simulations and experimentally. The results of this study support the validity of the recently published patent.

Direct Power Control for Three-Level Multifunctional Voltage Source Inverter of PV Systems Using a Simplified Super-Twisting Algorithm

“…In addition, these obtained results prove the results obtained in the work [63]. Fuzzy logic control 0.92 [70] Higher-order sliding mode control 0.80 [71] Proposed control (SSAT) 0.58…”

Developed AC/DC/AC Converter Structure Based on Shunt Active Filter and Advanced Modulation Approach for Asymmetrical Cascade H-Bridge Multilevel Inverters

“…In this context, the LCL grid-connected PWM-Active Front-End topology (AFE), connected to the grid by phase shifted multi-winding transformer, are proposed to energize the (CHB) modules [12]. It is worth noting that the use of the LCL filter is restricted by the control complexity and the destructive phenomenon of series and/or parallel resonances/antiresonance with the grid [15]. Also, in [16] the author suggested a single phase (reduced cell-CHB) topology connected to the AC grid side though passive Lseries filter; the reduced cell consists of (two IGBTs -two capacitors).…”

Research on Parameter Optimization Method of Sliding Mode Controller for the Grid-Connected Composite Device Based on IMFO Algorithm

“…The choice of sliding mode surface and reaching law is the most important part in the design of sliding mode variable controller, which directly affects the control performance of sliding mode variable controller. Considering that integration can eliminate the static error of the system, the integral sliding surface is selected in this paper, as shown in Equation (3) [ 18 , 19 ]. where and are control errors, , .…”

“…The most outstanding advantage of the SMC control is that the operation of the system is only affected by the sliding mode surface parameters and is not affected by the original parameters of the system, so that the system has more excellent full adaptability than robustness under certain conditions [ 18 , 19 ].…”