Sliding Mode Control of Single-Phase Grid-Connected Quasi-Z-Source Inverter

Shinde, Umesh; Kadwane, Sumant G.; Gawande, S. P.; Reddy, M. Jaya Bharata; Mohanta, Dusmanta Kumar

doi:10.1109/access.2017.2708720

Cited by 56 publications

(38 citation statements)

References 17 publications

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“…For DC side voltage regulation, different control strategies, like sliding mode control (SMC), have also been investigated in the literature [18][19][20]. SMC was investigated in a grid-connected QZSI * Correspondence: ukshinde@yahoo.com for improving dynamic response of capacitor voltage control [21]. The superiority of SMC over a classical PI controller has been demonstrated for rapid changes in reference capacitor voltage.…”

Section: Introductionmentioning

confidence: 99%

Grid-connected quasi-z-source inverter with battery

Shinde¹,

Kottagattu²,

Kadwane³

et al. 2018

Turk J Elec Eng & Comp Sci

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Grid-connected inverters are now increasingly used in distributed microgrid and smart-grid applications.The advantages of a quasi-Z-source inverter (QZSI), like single-stage operation, lower component rating, continuous input current, and common DC rail, led to an investigation of this converter for grid-connected applications. This paper presents a grid-connected QZSI with both AC and DC side controls. A new battery-charging configuration is also suggested across the capacitor through which the DC side control loop is regulated. Fast dynamic response and reduced harmonics are demonstrated through simulation and experimental results.

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Section: Introductionmentioning

confidence: 99%

Grid-connected quasi-z-source inverter with battery

Shinde¹,

Kottagattu²,

Kadwane³

et al. 2018

Turk J Elec Eng & Comp Sci

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show abstract

“…In order to alleviate the limitations of conventional power converters, the quasi-Z-source inverter (qZSI) has been proposed in various power systems [21][22][23][24][25]. The qZSI is an improved version of the Z-source inverter (ZSI).…”

Section: Power Management Frameworkmentioning

confidence: 99%

A Novel Self-Powered Dynamic System Using a Quasi-Z-Source Inverter-Based Piezoelectric Vibration Energy Harvester

2020

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The use of quasi-Z-source inverters (qZSIs) for DC-DC power conversion applications has gained much recognition when dealing with grid-tied renewable energy resource integrations. This paper proposes a novel self-powered dynamic system (SPDS) involving a piezoelectric vibration energy harvester (PVEH) using qZSI to establish interoperability with a DC load rated at 16.15 mW. Based on uncertain output performances from a piezoelectric cantilever beam (CB), the qZSI-based PVEH serves as a dynamic voltage restoration unit that establishes load-following synchronisation. It uses a proportional-integral based boost controller (PI-based BC) to generate strategic ordering of shoot-through voltage amplification into pulse-width modulation (PWM) gating sequences. The SPDS was modelled using two software based on commercially available product specifications: (i) COMSOL Multiphysics to mechanically design and optimise a CB. (ii) PSCAD/EMTDC to electronically design and integrate the qZSI with the optimised CB, while functioning as a testbed to model the SPDS against arbitrary wind speed and structural vibration frequency data collected from an above-ground mass rapid transit (MRT) train station in Khatib, Singapore. The acquired simulation results have depicted desirable transient responses at respective sub-systems, procuring fast settling-time responses, negligible steady-state error, as well as high efficiencies of 94.07% and 91.64% for the CB and SPDS respectively.

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“…Indeed, the robustness and parameter invariance [35,36] of Sliding Mode Control (SMC) is well known and makes it an attractive choice for voltage and current control in micro-grids, where load conditions are unknown and network parameters are subject to variations [37][38][39][40][41][42][43]. SMC based techniques result in better voltage regulation in the presence of parametric variations, modeling uncertainties and external disturbances [44][45][46].…”

Section: Dc-dc Convertermentioning

confidence: 99%

Fixed Frequency Sliding Mode Control of Power Converters for Improved Dynamic Response in DC Micro-Grids

2018

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The rapid decrease in conventional energy resources and their harmful impact on the environment has brought the attention of the researchers towards the use of renewable energy technologies. The renewable energy systems are connected to Direct Current (DC) micro-grids via power electronic converters where the load conditions are unknown and network parameters are uncertain. These conditions call for the use of robust control techniques such as Sliding Mode Control (SMC) in order to regulate the grid voltage. However, SMC has a drawback of operating the power converter at variable switching frequency which results in degrading the power quality. This paper introduces a fixed frequency sliding mode controller that does not suffer from this predicament. A novel double integral type switching manifold is proposed to achieve voltage regulation of a DC micro-grid, in the presence of unknown load demands and un-modeled dynamics of the network. Rigorous mathematical analysis is carried out for the stability of the closed loop system and the technique is experimentally validated on position of a DC micro-grid using a specially designed test rig. For benchmarking purposes, a conventional Proportional Integral (PI) controller is also implemented. An improvement of 2.5% in rise time, 6.7% in settling time and reduction of voltage dip by 31.7% during load transaction is achieved as compared to the PI controller. The experiment confirms the hypothesis that fixed frequency SMC shows better performance than its counterpart in the phase of introduced disturbances.

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Sliding Mode Control of Single-Phase Grid-Connected Quasi-Z-Source Inverter

Cited by 56 publications

References 17 publications

Grid-connected quasi-z-source inverter with battery

Grid-connected quasi-z-source inverter with battery

A Novel Self-Powered Dynamic System Using a Quasi-Z-Source Inverter-Based Piezoelectric Vibration Energy Harvester

Fixed Frequency Sliding Mode Control of Power Converters for Improved Dynamic Response in DC Micro-Grids

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