Single‐stage buck‐boost off‐grid inverter with feedforward control

Yao, Zhilei; Liang, Cai

doi:10.1002/cta.3555

Cited by 4 publications

(3 citation statements)

References 22 publications

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“…Due to the sensitivity of the ZAS controlled system to measurement noise, it is necessary to incorporate a feed‐forward secondary control 38 . This additional control action helps to handle the system's transient response, reduces steady‐state errors, and improves disturbance rejection 39–41 . In case under study, the feed‐forward action corrects the duty cycle by taking a weighted average between the calculated duty cycle

\overset{d_{Z}}{true}

and the expected duty cycle based on the required gain (7).…”

Section: Methodsmentioning

confidence: 99%

“…38 This additional control action helps to handle the system's transient response, reduces steady-state errors, and improves disturbance rejection. [39][40][41] In case under study, the feed-forward action corrects the duty cycle by taking a weighted average between the calculated duty cycle d Z and the expected duty cycle based on the required gain (7). The correction is performed as follows:…”

Section: Zero Average Surface Controlmentioning

confidence: 99%

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Boost‐flyback converter: Experimental assessment of recent control techniques

Muñoz,

Angulo‐García,

Angulo

2023

Circuit Theory & Apps

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The boost‐flyback converter is a type of DC‐DC power converter that allows for efficient step‐up voltage conversion. Despite its potential for achieving high voltage gains, there is a lack of comprehensive analysis and practical implementation of reliable control methods for this converter. To date, only a few control techniques have been thoroughly examined and, more importantly, validated on hardware for this specific converter. In this paper, a comprehensive evaluation of two control techniques is presented, namely, zero average surface (ZAS) and hysteresis band (HB) control, for the boost‐flyback converter. Insights into the performance of these techniques and their applicability in real‐world scenarios are provided by experimental investigation. Experimental results have shown that the ZAS controller, while promising in theory, requires the inclusion of a secondary feed‐forward control loop to achieve accurate regulation of the output and effective disturbance rejection. This finding has highlighted the sensitivity of the ZAS control to measurement noise and the importance of careful consideration when implementing it in hardware. By providing a detailed comparison and insights into the performance of these control techniques, this study contributes to the advancement of control strategies for the boost‐flyback converter and guides future research in this field.

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\overset{d_{Z}}{true}

and the expected duty cycle based on the required gain (7).…”

Section: Methodsmentioning

confidence: 99%

Section: Zero Average Surface Controlmentioning

confidence: 99%

Boost‐flyback converter: Experimental assessment of recent control techniques

Muñoz,

Angulo‐García,

Angulo

2023

Circuit Theory & Apps

View full text Add to dashboard Cite

show abstract

“…However, the Buck-Boost converter exhibits strong nonlinear characteristics, including period-double bifurcation, boundary collision bifurcation, and chaos [5] , which directly impact the stable operation and safe and reliable performance of the converter system. Currently, by conducting research on various DC-DC converters from different perspectives [6,7] , productive research results and a series of effective control methods have been achieved [8][9][10] . Zheng and Peng [11] employed passive delay feedback and improved sliding mode control methods for a voltage control Buck-Boost converter operating in chaotic bifurcation and intermittent modes to achieve the stable operation of the control system under a single-cycle condition.…”

Section: Introductionmentioning

confidence: 99%

Estimation-Correction Modeling and Chaos Control of Fractional-Order Memristor Load Buck-Boost Converter

Wang,

Zhang

et al. 2024

Complex Syst. Model. Simul.

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A fractional-order memristor load Buck-Boost converter causes periodic system oscillation, electromagnetic noise, and other phenomena due to the frequent switching of the switch in actual operation, which is detrimental to the stable operation of the power electronic converter. It is of great significance to the study of the modeling method and chaos control strategy to suppress the nonlinear behavior of the Buck-Boost converter and expand the safe and stable operation range of the power system. An estimation-correction modeling method based on a fractional active voltage-controlled memristor load peak current Buck-Boost converter is proposed. The discrete numerical solution of the state variables in the continuous mode of the inductor current is derived. The bursting oscillation phenomenon when the system introduces external excitation is analyzed. Using bifurcation, Lyapunov exponent, and phase diagrams, a large number of numerical simulations are performed. The results show that the Buck-Boost converter is chaotic for certain selected parameters, which is the prerequisite for the introduction of the controller. Based on the idea of parameter perturbation and state association, a three-dimensional hybrid control strategy for a fractional memristor Buck-Boost converter is designed. The effectiveness of the control strategy is verified by simulations, and it is confirmed that the system is controlled in a stable periodic state when the external tunable parameter s, which represents the coupling strength between the state variables in the system, gradually decreases in [−0.4, 0]. Compared with integer-order controlled systems, the stable operating range of fractional-order controlled systems is much larger.

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Commutation strategy for reduced output voltage ripple in alternative cascaded boost converter

García‐Vite,

Rebullosa‐Castillo,

García‐Perales

et al. 2024

Circuit Theory & Apps

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SummaryWith the rapid penetration of low‐voltage direct current (DC) generators such as photovoltaic panels and storage energy systems, the need for processing energy has propitiated the optimization of power electronics converters. Conventional topologies of power electronics converters have well‐known limitations, mainly due to the parasitic elements and finite commutation times, which do not allow for obtaining a sufficient voltage gain. The literature review has demonstrated that cascade topologies are suited to overcome these limitations. However, to provide a low‐ripple output voltage, they require high values of capacitances. This paper presents an alternative boost converter developed by cascading two power cells. The conventional configuration is slightly modified, producing an alternative power cell. Even though the number of elements is increased, following the suggested commutation strategy, the derived converter can substantially reduce the output voltage ripple. Therefore, capacitors of small value can be employed, avoiding using electrolytic capacitors with shorter life spans than their film counterparts. Besides, given the cascaded connection, the converter possesses a quadratic‐type gain since two independent commanding signals are applied. The different states of commutation are analyzed in depth, allowing the selection of an adequate commutation strategy, which gives the advantage of canceling the output voltage ripple. The mathematical model of the converter is presented and then validated via a scale‐lab prototype. The simulation results evidence the good dynamic performance of the control‐loop design by means of the frequency response analysis.

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Single‐stage buck‐boost off‐grid inverter with feedforward control

Cited by 4 publications

References 22 publications

Boost‐flyback converter: Experimental assessment of recent control techniques

Boost‐flyback converter: Experimental assessment of recent control techniques

Estimation-Correction Modeling and Chaos Control of Fractional-Order Memristor Load Buck-Boost Converter

Commutation strategy for reduced output voltage ripple in alternative cascaded boost converter

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