Direct Power Control of a Dual Converter Operating as a Synchronous Rectifier

Restrepo, José; Aller, J.M.; Bueno, Alexander; Viola, Julio; Berzoy, Alberto; Harley, R.G.; Habetler, T.G.

doi:10.1109/tpel.2010.2084106

Cited by 20 publications

(6 citation statements)

References 32 publications

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“…However, it leads to improper multilevel voltage waveforms with high harmonic distortion and increased dv/dt. The second group consists of composite modulators with carrier based (CB) or space vector (SV) based pulse width modulation (PWM) strategies [9], [17]- [24]. Even the combinations of CBPWM and SVPWM strategies can be applied for the two inverters with proper communication or estimation [9].…”

Section: Power Sharingmentioning

confidence: 99%

Dual inverter system with integrated energy storage for grid connected photovoltaic systems

Jayasinghe

Vilathgamuwa

2015

2015 IEEE 11th International Conference on Power Electronics and Drive Systems

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Smooth and fluctuation free power dispatch is strongly encouraged by grid operators and therefore energy storage is becoming an indispensable part in modern large scale grid connected photovoltaic (PV) systems. As a result, associated power converter topologies and energy storage interfacing technologies are currently receiving unprecedented attention. The most common energy storage interfacing technique used in grid connected PV systems is the use of an additional power electronic converter between the energy storage system and the grid connecting inverter. Taking the disadvantages of this implementation into account this paper proposes a dual inverter based battery direct integration scheme for grid connected PV systems. In this approach, the generation of proper multilevel voltage waveforms is a complicated process, particularly when the battery is charging. A modified space vector modulation method and switching strategy are proposed in this paper to address this issue. Simulation results are presented to prove the efficacy of the proposed topology and the modulation technique.Index Terms-Dual inverter, energy storage interfacing, grid connected PV systems.

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Section: Power Sharingmentioning

confidence: 99%

Dual inverter system with integrated energy storage for grid connected photovoltaic systems

Jayasinghe

Vilathgamuwa

2015

2015 IEEE 11th International Conference on Power Electronics and Drive Systems

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“…The output voltage is maintained by the back-gate diode D1 of the rectifying power switching device NM1 under a certain magnitude when the chip is enabled [22][23][24]. When the output voltage is not high enough to supply the sub-circuits properly, the ultra-low startup module is operated.…”

Section: Structure Of Proposed Hysteretic Current Mode Convertermentioning

confidence: 99%

Ultra‐low startup voltage low output ripple high‐efficiency hysteretic current mode step‐up DC–DC converter

Chi

Lai

2015

IET Power Electronics

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This study proposes a hysteretic current mode step-up DC-DC converter with ultra-low startup voltage, low output ripple and high efficiency, which is suitable to be used as a power supply for an accurately voltage controlled systems, high-efficiency devices and low-voltage supply applications. A startup module is used for operating the switches when the input voltage is not high enough to supply the control circuit. The output ripple is restricted by a fixed-hysteretic current mode controller whether the load is heavy or light. The high efficiency is obtained by applying an auto-mode changed technology under light load. This makes some sub-circuits of the chip enter into the power save mode and shuts down the power switching devices. At the same time, a back-gate diode of the rectifying power metal-oxide semiconductor device is used for maintaining output voltage. The chip has been made with a standard 0.35-μm complementary metal-oxide semiconductor process forming an area of only 960 μm × 820 μm. Experimental results show that the minimum startup voltage is 0.8 V; and the output voltage ripple is <10 mV. Moreover, the peak efficiency is 95% with a heavy load that can prolong battery life.

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“…It is worth pointing out that the values of the predicted duration times for the selected two active voltage vectors can be less than zero, which should be taken into account in the real control system since the duration time of a voltage vector must never be negative. More recently, an optimized version of DPC algorithm has been proposed in [19] for a dual converter's topology, which was constructed as one controlled rectifier for increased power conversion applications by employing lower voltage switching devices. Based on the instantaneous variations of active and reactive powers, the authors in [20] presented modified switching tables and asymmetrical hysteresis controller for active power regulation with respect to LUT DPC strategy of grid-connected dc-ac converters.…”

Section: Introductionmentioning

confidence: 99%

Improved Voltage-Vector Sequences on Dead-Beat Predictive Direct Power Control of Reversible Three-Phase Grid-Connected Voltage-Source Converters

Zhu

2013

IEEE Trans. Power Electron.

152

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This paper presents a dead-beat predictive direct power control (DPC) strategy and its improved voltage-vector sequences for reversible three-phase grid-connected voltage-source converters (VSCs). The instantaneous variation rates of active and reactive powers, by applying each converter voltage vector in 12 different sectors, are deduced and analyzed. Based on the power variation rates, it is found that the values of the predicted duration times for the two conventional active converter voltage vectors are less than zero when the grid-connected VSC operates as either a rectifier or an inverter. In order to solve this issue, two new alternative vector sequences are proposed and compared. Experimental results on a 1.5 kW reversible grid-connected VSC system are presented to validate the feasibility of the proposed voltage-vector sequences on the dead-beat predictive DPC strategy.

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Direct Power Control of a Dual Converter Operating as a Synchronous Rectifier

Cited by 20 publications

References 32 publications

Dual inverter system with integrated energy storage for grid connected photovoltaic systems

Dual inverter system with integrated energy storage for grid connected photovoltaic systems

Ultra‐low startup voltage low output ripple high‐efficiency hysteretic current mode step‐up DC–DC converter

Improved Voltage-Vector Sequences on Dead-Beat Predictive Direct Power Control of Reversible Three-Phase Grid-Connected Voltage-Source Converters

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