A low-device-count single-stage direct-power-conversion solar microinverter for microgrid

Mazumder, Sudip K.; Mehrnami, Siamak

doi:10.1109/pedg.2012.6254082

Cited by 21 publications

(8 citation statements)

References 9 publications

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“…In the literature, several bidirectional DC-DC converters have been used, e.g., flyback [17,18], cuk [19,20], and boost [2][3][4][5][6][7][8]. The latter topology, also known as Dual Boost Inverter (DBI), is the one under analysis in this work.…”

Section: Topology Descriptionmentioning

confidence: 99%

Sliding Mode Based Control of Dual Boost Inverter for Grid Connection

et al. 2019

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Single-stage voltage step-up inverters, such as the Dual Boost Inverter (DBI), have a large operating range imposed by the high step-up voltage ratio, which together with the converter of non-linearities, makes them a challenge to control. This is particularly the case for grid-connected applications, where several cascaded and independent control loops are necessary for each converter of the DBI. This paper presents a global current control method based on a combination of a linear proportional resonant controller and a non-linear sliding mode controller that simplifies the controller design and implementation. The proposed control method is validated using a grid-connected laboratory prototype. Experimental results show the correct performance of the controller and compliance with power quality standards.

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Section: Topology Descriptionmentioning

confidence: 99%

Sliding Mode Based Control of Dual Boost Inverter for Grid Connection

et al. 2019

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“…Three phase SEPIC based inverter is shown by [24]. Differential-mode single-phase Ćuk inverter is introduced in [25], and its design and modulation are presented by [26], [27]. References [22], [28] shows that topological embodiment of the differential inverter with Ćuk converter has some advantages.…”

Section: Introductionmentioning

confidence: 99%

Modulation Scheme for Three-Phase Differential-Mode Ćuk Inverter

Mehrnami

Mazumder

Soni

2016

IEEE Trans. Power Electron.

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Three-phase differential-mode inverters are singlestage inverters, which have the potential to reduce the number of devices and cost with higher power density. Among such inverter topologies, differential-mode three-phase Ćuk inverter (DTCI) has some advantage over other topologies, including modularity, lower number of switches, bidirectional power flow capability, and galvanic isolation. DTCI is a promising configuration for renewable-/alternative-energy applications with isolated and nonisolated structures. The continuous modulation scheme (CMS), which was introduced originally for the DTCI, activates all of three modules of the inverter. CMS increases the circulating power in modules and hence increases inverter power loss. This paper describes a discontinuous modulation scheme (DMS) for the DTCI which deactivates one module at a time resulting in a discontinuous operation of the inverter modules. The experimental open-and closed-loop results of DMS and CMS based DTCI are provided and compared. DMS reduces the circulating power, device voltage ratings, and mitigates the DTCI losses. The DTCI exhibits a nonlinear voltage-gain with both DMS and CMS. It has been demonstrated that by feedforwarding the input voltage and incorporating a static linearization method the harmonic distortion of the output voltage is considerably reduced.A 0885-8993 (c)

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“…Overall, for low-power applications the cost-benefit tradeoff of a multi-stage HFL inverter topology requires careful attention. As such, for low-power single-phase HFL inverter applications, there is an enhanced thrust to seek single-stage topological solutions [12]- [26].…”

Section: Introductionmentioning

confidence: 99%

“…1, which was originally outlined in [25]. The DMCI topology [26] comprises two modules, which are connected in parallel at the dc side and connected in series at the ac side. The DMCI yields several useful features [12] that directly impact the cost, reliability, and power density.…”

Section: Introductionmentioning

confidence: 99%

Discontinuous Modulation Scheme for a Differential-Mode Ćuk Inverter

Mehrnami

Mazumder

2015

IEEE Trans. Power Electron.

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The differential-mode Ćuk inverter (DMCI) is a single-stage inverter with low device count. It offers advantages over other topologies because of compactness, higher power density, and reduced cost. It is a promising topological configuration for renewable-/alternative-energy applications with isolated as well as non-isolated structures. The continuous modulation scheme (CMS), which was introduced originally for this inverter, activates all the modules of the DMCI. The new discontinuous modulation scheme (DMS) deactivates one module in each half line-cycle leading to discontinuous operation of modules. This paper outlines the DMS and a mechanism to realize it. The experimental open-loop and closed-loop results of the DMCI using CMS and DMS are provided along with a comparison of their performances. It is shown that, the DMS reduces the circulating power and hence mitigates the losses. The voltage ratings of the devices also are reduced with the DMS. In contrast, the CMS has wider linearity in its normalized dcvoltage gain and yields reduced harmonic distortion of the output voltage. For DMS, to achieve comparable linearity in normalized dc-voltage gain and distortion, harmonic compensation under closed-loop control is a pathway that has been demonstrated.

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A low-device-count single-stage direct-power-conversion solar microinverter for microgrid

Cited by 21 publications

References 9 publications

Sliding Mode Based Control of Dual Boost Inverter for Grid Connection

Sliding Mode Based Control of Dual Boost Inverter for Grid Connection

Modulation Scheme for Three-Phase Differential-Mode Ćuk Inverter

Discontinuous Modulation Scheme for a Differential-Mode Ćuk Inverter

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