Aalborg Inverter - A New Type of “Buck in Buck, Boost in Boost” Grid-Tied Inverter

Wu, Weimin; Ji, Junhao; Blaabjerg, Frede

doi:10.1109/tpel.2014.2363566

Cited by 115 publications

(56 citation statements)

References 36 publications

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“…Another single-stage, buck-boost inverter has the advantage of reduced magnetic volume and low leakage currents [9]. The topologies in [10][11][12] were conceived to also eliminate the leakage currents, but the number of active switches is increased, as observed in Figure 1d. Furthermore, a differential buck-boost inverter with active power decoupling capability was proposed in [13,14], where no extra components are required.…”

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%

“…(e) (f) Figure 1. Prior-art, single-stage, buck-boost inverters: (a) [5], (b) [6], (c) [7], (d) [12], (e) [15], and (f) [20].…”

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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Section: Introductionmentioning

confidence: 99%

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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“…At the same time all of them did not find industrial application. For example, the solution [26] requires reverse-blocking IGBTs, while others are quite complex solutions.An Aalborg inverter ( Figure 1b) is proposed as an inverter that combines buck and boost functionality [30][31][32][33][34][35]. These solutions have two independent buck-boost stages that are responsible for output sinusoidal voltage generation.…”

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confidence: 99%

Bidirectional Twisted Single-Stage Single-Phase Buck-Boost DC-AC Converter

et al. 2019

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This paper describes a bidirectional twisted single-phase single-stage buck-boost dc-ac converter based on an output unfolding circuit. This solution is derived by the combination of an inverting buck-boost dc-dc converter and an unfolding circuit. The operation principle, component design guidelines, along with the control approach are presented. The zero-crossing distortion problem is discussed and solved by a simple approach. The simulation and experimental results confirm all theoretical statements. Loss distribution and achievable efficiency are analyzed. Finally, the pros and cons of the proposed solution, along with the most promising application field, are analyzed and discussed in the conclusion.Another application field of the dc-ac converter with wide input voltage regulation is battery storage. Lithium-ion batteries are targeted to become the most popular choice for on-grid and grid-off solar battery storage in the foreseeable future. Such types of batteries have a wide range of input voltage. A converter that accepts different storage elements is preferable.Several single-stage alternatives were presented as alternative solutions. Inverters with an active boost cell were described in [6][7][8][9]. These inverters provide very high boost of the input voltage but suffer from high current spikes in the semiconductors and passive elements. Impedance-source networks have been reported in many research papers as a promising single-stage solution. Z-source inverters (ZSIs) and quasi-Z-source inverters (qZSIs) were proposed for different applications. Existing solutions were reviewed in [10][11][12][13][14], and different relevant issues are addressed in [15][16][17][18][19][20]. However, recent research revealed evident drawbacks of the IS-based converters in terms of power density and efficiency [21][22][23].Split-source inverters (SPIs) [24,25] were proposed as another alternative solution. According to the literature, SPIs have less passive component counts accompanied by higher voltage and current stresses at lower voltage gains, and they do not have short circuit immunity.Several interesting single-stage buck-boost inverters were proposed in [26][27][28][29]. At the same time all of them did not find industrial application. For example, the solution [26] requires reverse-blocking IGBTs, while others are quite complex solutions.An Aalborg inverter ( Figure 1b) is proposed as an inverter that combines buck and boost functionality [30][31][32][33][34][35]. These solutions have two independent buck-boost stages that are responsible for output sinusoidal voltage generation. The main advantage of the proposed solution is in the minimum voltage drop of the filtering inductors in the power loop at any time. At the same time, this solution uses a double number of semiconductors and an inductor in the buck and boost stage, which is an obvious drawback. Another drawback consists in the two power sources utilization. A similar idea with double components is discussed in [36].The solution based on the input boost a...

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“…Paper [19] presents a family of high efficiency single-stage dc/ac inverter, only one power stage works in high frequency stage at any time, which can reduce switching losses. Nonetheless, the passive components still can not be decreased.…”

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confidence: 99%

Comparative Analysis of Two Modulation Strategies for an Active Buck–Boost Inverter

Tang

Bai

et al. 2016

IEEE Trans. Power Electron.

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The inverter used in new energy power generation system should have the ability to adapt a wide range of DC input voltage. Based on the active buck-boost inverter which consists of a full bridge and Boost AC/AC part, two modulation methods are compared: constant boost ratio modulation and dual mode modulation. Along with the relationship of the input DC voltage and the reference AC voltage, the converter completes buck or boost inversion with different equivalent circuits and there are fewer switches working at high frequency in dual mode modulation, which is in favor of the system with high efficiency. The current of the inductor and the current stress of the switches is analyzed in this paper. Experimental results are presented to verify the proposed topology can achieve dual mode operation with wide range of input voltage.Index terms-wide input, buck-boost inverter, constant boost ratio modulation, dual mode modulation I. INTRODUCTIONWith the development of the new energy, more and more attention is paid to inverters which can convert the DC voltage to AC voltage. According to whether there is isolation, the inverter can be divided into isolated and non-isolated type [1]-[3].The isolated type with a transformer has bigger volume and a higher cost, which is a disadvantage for new energy power generation system [4]-[5]. Influenced by the light, temperature and so on, the output voltage range of PV cell is very wide [6]-[7]. The output voltage of the single fuel cell is very low. If too many cells are in series, the voltage sharing is difficult to realize. So the inverters should have the ability to boost the input voltage [8].The non-isolated inverters also can be divided into single-stage inverters and multi-stage inverters [9]- [11].Boost cascaded inverters and buck-boost cascaded inverters are typical two-stage inverters [12]- [13]. The two-stage structure has many inductors and capacitors which are not suitable for integration. The DC bus needs big electrolytic capacitor which reduces the power density, is aging easily and has a short service life. On the other hand, 0885-8993 (c)

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Aalborg Inverter - A New Type of “Buck in Buck, Boost in Boost” Grid-Tied Inverter

Cited by 115 publications

References 36 publications

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

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

Bidirectional Twisted Single-Stage Single-Phase Buck-Boost DC-AC Converter

Comparative Analysis of Two Modulation Strategies for an Active Buck–Boost Inverter

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