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1

Robust Back-stepping Based Higher Order Sliding Mode Control of Non-Inverted Buck-Boost Converter for a Photovoltaic System

Ullah Shaukat

Power Electronics and Drives

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2021

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Vol. 6 (41)

113--127

EN

Photovoltaic (PV) system generates renewable energy from sunlight, which has low efficiency due to the variance in nature of temperature and irradiance in a fast changing environment condition. Different researchers have proposed different maximum power point tracking MPPT techniques to improve the efficiency. However, still there are many open issues. Thus, to address this, a non-linear back-stepping-based higher order sliding mode controller (BHOSMC) is proposed to harvest maximum power from PV system. The PV module and load is interfaced by a non-inverted buck-boost converter (NIBBC). A linear interpolation method is used for voltage generation and Lyapunov stability is used to verify the control system equation. MATLAB/Simulink software is used for testing the proposed controller performance. The experimental result verified that the proposed BHOSMC is robust, accurate and fast tracking, faultless and less chattering as compared to perturb and observe (P&O), back-stepping control (BSC) and back-stepping-based sliding mode control under rapidly varying meteorological condition.

2

A Bidirectional Buck-Boost Converter-Based Switching Ripple Communication Strategy for Intelligent Street Lighting Systems

Zhang Yixuan, Hu Yihua, Tse Zion, Liu Yuwei, Deng Jiamei, Xu Hui, Wang Yangang, Li Wei

Power Electronics and Drives

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2021

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Vol. 6 (41)

260--275

EN

The light-emitting diode (LED) is an essential component of intelligent street lighting (ISL) systems. An efficient ISL system can not only reduce power consumption by planning LED illuminating time but also reduce maintenance costs through a high degree of automation. In this paper, a buck-boost converter is used to realise composite transmission of power and signals for an ISL system. The power is modulated by the pulse width modulation (PWM) approach, and the switching ripple generated in the PWM process is utilised as the carrier of the signals transmitted between the remote-control centre and the slave nodes. Moreover, the proposed model involves a ‘request to send (RTS)/confirm to send (CTS)’ mechanism to avoid signal conflicts. Compared with the conventional power line communication (PLC) approach, the proposed transmission scheme has the advantages of simple circuit structure and simple system wiring. Additionally, a simulation model built in MATLAB/Simulink proves the designed transmission method has strong anti-noise ability.

3

A buck-boost controlled full bridge LED driver with zero-voltage switching

Ramakrishnareddy Ch. Kasi, Kumar K. Ranjith, Kalavathi M. Surya

Journal of Power Technologies

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2021

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Vol. 101, nr 1

62--69

EN

A full bridge driver circuit with modulated input voltage using buck-boost converter for LED lighting systems is proposed. A dc voltage source, which is in series, processes portion of lamp power without conversion. Small controlled power is supplied through full bridge circuit. In the proposed configuration, current stress of switches in full bridge is greatly reduced. In addition, zero-voltage switching (ZVS) is accomplished in full bridge devices. Input voltage variations can be compensated to maintain constant LED lamp current. All LED lamps are dimmed simultaneously using on-off control. The circuit description and analysis are discussed in detail and it is validated experimentally.

4

A new topology single-phase single switch non-isolated BuckBoost converter with improved performance

Ahmed Istiak, Sarowar Golam, Azad Ferdous S.

Przegląd Elektrotechniczny

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2020

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R. 96, nr 6

54--58

EN

A new topology of single–phase AC-DC Buck-Boost converter is presented in this paper. The proposed converter provides conversion efficiency as high as 99.29% for open loop operation. Proposed converter with feedback controller can provide quality power factor (0.98) and reduced input current THD (16%) for average 1000V DC output voltage. Dynamic response of the proposed converter has also been observed for sudden changes of load. Analysis and simulation results of the circuit are obtained using software simulation.

PL

Zaproponowana nową topologię jednofazowego przekształtnika DC-DC typu buck-boost. W stanie jałowym konwersja jest rzędu 99,29%. Zaproponowany konwerter ma dużą skuteczność, małe zniekształcenia prądu I dobrą dynamikę.

5

Buck-boost converter for universal-input PFC applications

Cismasiu D.

Przegląd Elektrotechniczny

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2006

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R. 82, nr 2

113-117

EN

In converters for power-factor-correction (PFC), universal-input capability (ability to operate from any AC line voltage, world-wide) comes with a heavy price in terms of component stresses and losses, size of components, and restrictions on the output DC voltage. A two-switch topology proposed by Jingquan Chen, Dragan Maksimovic and Robert Erikson offer very significant performance improvements over the single-switch buck-boost converters (including flyback, SEPIC, and Cuk topologies) and conventional two-switch buck-boost cascaded converters. The proposed convener has buck-boost conversion characteristic, switch conduction losses comparable to the boost converter, no inrush current problem, and potential for smaller inductor size compared to the boost converter.

PL

W przekształtnikach do poprawy współczynnika mocy (PFC) uniwersalne właściwości zasilania (zdolność do współpracy z dowolną siecią napięcia przemiennego) jest związana z wysoką ceną z uwagi na zagrożenie elementów, straty, parametry podzespołów i elementów o ograniczenia co do napięcia wyjściowego. Zaproponowany przekształtnik ma właściwości obniżająco-podwyższające, straty przewodzenia porównywalne z przekształtnika podwyższającego, brak udarów prądowych oraz możliwość zmniejszenia indukcyjności względem stosowanej w przekształtniku podwyższającym.