Manitoba Inverter—Single-Phase Single-Stage Buck-Boost VSI Topology

Ho, Carl Ngai Man; Siu, Ken King Man

doi:10.1109/tpel.2018.2855560

Cited by 33 publications

(13 citation statements)

References 20 publications

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“…In this case, a greater number of devices conduct at the same time, thus increasing conduction losses. A new transformerless single-phase single-stage buck-boost grid-connected VSI topology is proposed in [95]. Each mentioned topology has advantages and disadvantages.…”

Section: Single-stage Buck-boost Invertersmentioning

confidence: 99%

Leakage Current Reduction in Single-Phase Grid-Connected Inverters—A Review

et al. 2020

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The rise in renewable energy has increased the use of DC/AC converters, which transform the direct current to alternating current. These devices, generally called inverters, are mainly used as an interface between clean energy and the grid. It is estimated that 21% of the global electricity generation capacity from renewable sources is supplied by photovoltaic systems. In these systems, a transformer to ensure grid isolation is used. Nevertheless, the transformer makes the system expensive, heavy, bulky and reduces its efficiency. Therefore, transformerless schemes are used to eliminate the mentioned disadvantages. One of the main drawbacks of transformerless topologies is the presence of a leakage current between the physical earth of the grid and the parasitic capacitances of the photovoltaic module terminals. The leakage current depends on the value of the parasitic capacitances of the panel and the common-mode voltage. At the same time, the common-mode voltage depends on the modulation strategy used. Therefore, by the manipulation of the modulation technique, is accomplished a decrease in the leakage current. However, the connection standards for photovoltaic inverters establish a maximum total harmonic distortion of 5%. In this paper an analysis of the common-mode voltage and its influence on the value of the leakage current is described. The main topologies and strategies used to reduce the leakage current in transformerless schemes are summarized, highlighting advantages and disadvantages and establishing points of comparison with similar topologies. A comparative table with the most important aspects of each converter is shown based on number of components, modes of operation, type of modulation strategy used, and the leakage current value obtained. It is important to mention that analyzed topologies present a variation of the leakage current between 0 to 180 mA. Finally, the trends, problems, and researches on transformerless grid-connected PV systems are discussed.

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Section: Single-stage Buck-boost Invertersmentioning

confidence: 99%

Leakage Current Reduction in Single-Phase Grid-Connected Inverters—A Review

et al. 2020

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“…The switch-mode inverter topologies are developed through the reorganizing of the direct current-direct current (DC-DC) converters to be able to produce alternative voltages. Although buck-, [14][15][16] boost-, [17][18][19][20] buck-boost-, [21][22][23][24] and Cuk-type [25][26][27] switch-mode singlephase inverters in quite numbers are successfully developed, the limited numbers of three-phase switch mode inverters find place in the literature with such as buck, 28,29 boost, 30,31 and Cuk 32,33 types. Buck-boost-type switch-mode three-phase inverters are also studied in the literature, and a comparative brief analysis of these studies is given in the below paragraph.…”

Section: Introductionmentioning

confidence: 99%

A novel three‐phase buck‐boost inverter controlled by an open‐loop assisted closed‐loop hybrid control method

Yalçın

2021

Circuit Theory & Apps

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Summary A novel general purpose three‐phase buck‐boost inverter without need of additional filtering units is presented in this study. The proposed inverter topology is built with moderate numbers of elements in terms of the operation advantages and qualities. The buck‐boost converter‐based structure provides obtaining wide‐range output voltage amplitudes lower or higher than the input voltages. A novel hybrid control method that is open‐loop assisted closed‐loop control is proposed for the inverter operation to improve the response performance on various input and output operation conditions. The wye‐connected modular structure of the proposed inverter topology also enables unbalanced three‐phase operation and single‐phase operation for each phase with independent phase voltages and frequencies. An experimental laboratory setup is built for the proposed three‐phase inverter for 0–50 Hz, 0–100 Vp, and 1.5 kW operation values for real‐time application tests. Simulation tests are also applied for the inverter. The obtained results for both the simulation and the experimental tests show that the presented inverter with the proposed hybrid control method is capable of operating in balanced/unbalanced three‐phase and independent single‐phase modes while producing close to sine wave output voltages under 5% THD levels with wide range desired amplitudes and frequencies on different operating points.

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“…[18] presented a converter with eight switches and four inductors, while [19] has four switches, four diodes, and six inductors, which make the topologies quite complicated. The topology in [20] has merits of a wide input voltage range, low leakage currents, small grid current ripples, and low common-mode voltages. However, as seen in Figure 1f, it has four high-frequency switches and two bidirectional switches, which are realized by connecting back-to-back MOSFETs in series.…”

Section: Introductionmentioning

confidence: 99%

“…Doing so significantly increases the total number of switches (i.e., eight). Although the ideas of [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] are very interesting, their attained voltage gain is comparable to the traditional buck-boost converter.…”

Section: Introductionmentioning

confidence: 99%

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A Family of Single-Stage, Buck-Boost Inverters for Photovoltaic Applications

et al. 2020

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This paper introduces a family of single-stage buck-boost DC/AC inverters for photovoltaic (PV) applications. The high-gain feature was attained by applying a multi-winding tapped inductor, and thus, the proposed topologies can generate a grid-level AC output voltage without using additional high step-up stages. The proposed topologies had a low component count and consisted of a single magnetic device and three or four power switches. Moreover, the switches were assembled in a push-pull or half/full-bridge arrangement, which allowed using commercial low-cost driver-integrated circuits. In this paper, the operation principle and comparison of the proposed topologies are presented. The feasibility of the proposed topologies was verified by simulations and experimental tests.

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Manitoba Inverter—Single-Phase Single-Stage Buck-Boost VSI Topology

Cited by 33 publications

References 20 publications

Leakage Current Reduction in Single-Phase Grid-Connected Inverters—A Review

Leakage Current Reduction in Single-Phase Grid-Connected Inverters—A Review

A novel three‐phase buck‐boost inverter controlled by an open‐loop assisted closed‐loop hybrid control method

A Family of Single-Stage, Buck-Boost Inverters for Photovoltaic Applications

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