Simplified Small-Signal Model for Output Voltage Control of Asymmetric Cascaded H-Bridge Multilevel Inverter

Busarello, Tiago Davi Curi; Mortezaei, Ali; Paredes, Helmo Kelis Morales; Al‐Durra, Ahmed; Pomílio, José Antenor; Simões, Marcelo Godoy

doi:10.1109/tpel.2017.2704919

Cited by 31 publications

(21 citation statements)

References 27 publications

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“…The figure shows a region of interest, which is from approximately 1.5 kHz and below. Such a region is the region where the controller acts, taking into account that the desired cutoff frequency for the system should be from 8 to 10 times lower than the switching frequency [33]. The curves are almost coincident for the magnitude, while there is a slight difference in the phase curves.…”

Section: System Modeling In S-domainmentioning

confidence: 99%

Highly Accurate Digital Current Controllers for Single-Phase LCL-Filtered Grid-Connected Inverters

2020

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Photovoltaic (PV) systems are the most promising technology for residential installation as an alternative source of energy. To interface the primary source of PV to the electrical grid, an LCL-filtered inverter is being broadly adopted due to its low volume compared to the L-filtered one and the superior ability to filter high-frequency harmonics. In this context, this paper proposes highly accurate digital current controllers for single-phase LCL-filtered grid-connected inverters. The proposed controllers are: Integral-single-lead, integral double-lead, integral double-lead taking into account the effect of pulse width modulation (PWM) delay and the proportional-resonant (PR). These controllers are different from the traditional Proportional-Integral (PI), Proportional-Derivative (PD), and Proportional-Integral-Derivative (PID). One of the novelties of this paper is the detailed, step-by-step procedure for tuning each parameter of the proposed digital controllers considering the dynamic behavior of the LCL filter. The proposed PR has a different and more straightforward tuning methodology than those procedures commonly found in the literature. Therefore, this paper is an attractive tool for a fast, accurate, and reliable way to tune digital current controllers for a single-phase LCL-filtered grid-connected inverter. The controllers were verified in the digital signal controller (DSC) TMS320F28335 while the power structure runs in a hardware-in-loop (HIL device). Results show the efficacy of the proposed controllers.

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Section: System Modeling In S-domainmentioning

confidence: 99%

Highly Accurate Digital Current Controllers for Single-Phase LCL-Filtered Grid-Connected Inverters

2020

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“…Other than these, Busarello et al [29] presented a small-signal model for analyzing the output of single phase asymmetric cascaded H-bridge MLI. A cascaded MLI-based STATCOM with DC voltages controlled by control system employing small-signal model was presented in [30].…”

Section: Acmentioning

confidence: 99%

Design and Hardware Implementation Considerations of Modified Multilevel Cascaded H-Bridge Inverter for Photovoltaic System

et al. 2019

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Inverters are an essential part in many applications including photovoltaic generation. With the increasing penetration of renewable energy sources, the drive for efficient inverters is gaining more and more momentum. In this paper, output power quality, power loss, implementation complexity, cost, and relative advantages of the popular cascaded multilevel H-bridge inverter and a modified version of it are explored. An optimal number of levels and the optimal switching frequency for such inverters are investigated, and a five-level architecture is chosen considering the trade-offs. This inverter is driven by level shifted in-phase disposition pulse width modulation technique to reduce harmonics, which is chosen through deliberate testing of other advanced disposition pulse width modulation techniques. To reduce the harmonics further, the application of filters is investigated, and an LC filter is applied which provided appreciable results. This system is tested in MATLAB/Simulink and then implemented in hardware after design and testing in Proteus ISIS. The general cascaded multilevel H-bridge inverter design is also implemented in hardware to demonstrate a novel low-cost MOSFET driver build for this study. The hardware setups use MOSFETs as switching devices and low-cost ATmega microcontrollers for generating the switching pulses via level shifted in-phase disposition pulse width modulation. This implementation substantiated the effectiveness of the proposed design.

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“…This time period is called the order width, and the sine wave voltage is integrated and divided t U u m sin by Time period (step width), we can get the amplitude of each step of the ladder wave. Then sine wave voltage t U u m sin (1) Is the fundamental component of the ladder wave.…”

Section: Advances In Engineering Volume 87mentioning

confidence: 99%

“…With the increasing demand for high voltage and high power conversion devices in industrial applications, multi-level inverter technology has attracted much attention from scholars both at home and abroad [1]. While withstand voltage of switching devices has been an obstruction of power conversion device voltage level to a further improvement, in order to use low-voltage switching devices to obtain multi-level highvoltage output, scholars have adopted: diode clamp multi-level structure, Flying capacitor clamp multi-level structure and Hbridge cascade multi-level structure [2].…”

Section: Introductionmentioning

confidence: 99%

Cascade H-Bridge Multilevel Inverter Based on Microcontroller

Wang¹,

Xie²,

Zhang³

2017

Proceedings of the 2017 2nd International Conference on Automation, Mechanical and Electrical Engineering (AMEE 2017)

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Abstract-One of an H bridge Cascaded multilevel inverters was studied and designed. In this paper, the basic topology of microcontroller based H-bridge cascade multilevel inverter and the realization principle of control system are introduced. The principle and control strategy of the inverter are studied and described. Calculated by multi-superposition method, H bridge in the power field effect of the turn-off time is supposed to achieve the sine wave output, ladder wave modulation, with the switching device work in the fundamental frequency, small loss, and high efficiency. Circuit control part of the STM32 series chip by STMicroelectronics as the master chip, the device can run normally in the two H bridge out of the cascade of the state, causing a substantial increase in the reliability of the device; In EMTP power system in the electromagnetic transient analysis and simulation software,we construct a simulation model of 12H-bridge cascade. The simulation results show that the device can operate stably in the 12H bridge cascade state and n-1, n-2 state, which indicates the correctness and reliability of the design. In addition, the experimental device of 12H-bridge cascade multilevel inverter is designed, which realizes the design function and feasibility of this thesis.

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Simplified Small-Signal Model for Output Voltage Control of Asymmetric Cascaded H-Bridge Multilevel Inverter

Cited by 31 publications

References 27 publications

Highly Accurate Digital Current Controllers for Single-Phase LCL-Filtered Grid-Connected Inverters

Highly Accurate Digital Current Controllers for Single-Phase LCL-Filtered Grid-Connected Inverters

Design and Hardware Implementation Considerations of Modified Multilevel Cascaded H-Bridge Inverter for Photovoltaic System

Cascade H-Bridge Multilevel Inverter Based on Microcontroller

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