Parameter design of a five-level inverter for PV systems

Kashihara, Yugo; Itoh, Jun‐ichi

doi:10.1109/icpe.2011.5944405

Cited by 19 publications

(6 citation statements)

References 8 publications

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“…In (13), the power semiconductor conduction and switching losses, cond P and sw P respectively, are calculated as the sum of the conduction and switching losses of the individual power switches and diodes forming the power section of the PV inverter. For the calculation of the power semiconductor conduction losses, cond P , the PV inverter power switches and diodes are considered as voltage sources with resistors connected in series [24]:…”

Section: Pv Inverter Modeling For Optimizationmentioning

confidence: 99%

“…After the GA-based optimization process described in § 2 has been accomplished, the optimal value of the LCLfilter damping resistor, dr R , is calculated according to (10) using the resulting optimal values of L , g L and f C . The values of cond P and sw P in (13) have been calculated using the equations of the power-loss model presented in [24] as a function of according to [21,22].…”

Section: Design Optimization Examplementioning

confidence: 99%

“…Typically, iterative trial-and-error techniques are employed in the design process of PV inverters, targeting to maximize performance metrics such as the power conversion efficiency at nominal operating conditions, or the "European Efficiency" [1,[11][12][13]. An optimal LCL-filter design procedure is proposed in [14] for the minimization of a PWM voltage-source converter output-filter cost and volume.…”

Section: Introductionmentioning

confidence: 99%

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Methodology for the optimal design of transformerless grid-connected PV inverters

Koutroulis

Blaabjerg

2012

IET Pwr. Electr.

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The transformerless PV inverters are the major functional units of modern grid-connected PV energy production systems. In this paper, a new optimization technique is presented for the calculation of the optimal types and values of the components comprising a transformerless PV inverter, such that the PV inverter Levelized Cost Of the generated Electricity (LCOE) is minimized. The proposed method constitutes a systematic design process, which is capable to explore the impact of the PV inverter configuration on the trade-off between the PV inverter manufacturing cost and the power losses affecting the corresponding energy production. The design optimization results demonstrate that the optimal values of the PV inverter design variables depend on the inverter specifications, the technical and economical characteristics of the components used to build the PV inverter and the meteorological conditions prevailing at the installation area. Compared to nonoptimized transformerless inverters, the PV inverter structures derived using the proposed design optimization methodology exhibit lower manufacturing cost and simultaneously are capable of producing more energy into the electric grid system.

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Section: Pv Inverter Modeling For Optimizationmentioning

confidence: 99%

Section: Design Optimization Examplementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Methodology for the optimal design of transformerless grid-connected PV inverters

Koutroulis

Blaabjerg

2012

IET Pwr. Electr.

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“…Changes may have been made to this work since it was submitted for publication. To generate the switching pulses, a variety of strategies have been presented to generate the output voltage with reduced harmonics and simultaneously regulate the FC voltage of the converter such as carrier-based PWM [4], modified triangular carrier-based PWM [5], optimized pulse pattern [6] and selective harmonic elimination PWM (SHE-PWM) [7], [8]. In these methods, to generate switching pulses, the dc-link capacitor voltages are considered to be balanced or the calculation is carried out based on balanced condition.…”

Section: Introductionmentioning

confidence: 99%

A Novel Modulation Technique and a New Balancing Control Strategy for a Single-Phase Five-Level ANPC Converter

Teymour

Sutanto

Muttaqi

et al. 2015

IEEE Trans. on Ind. Applicat.

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This paper proposes a novel modulation technique and a new balancing control strategy for a single-phase five-level flying-capacitor (FC)-based active-neutral-point-clamped (ANPC) converter. The proposed modulator can control the FC voltage to follow the requested reference value and simultaneously generate the required ac output voltage regardless of the values of the dc capacitor voltages of the converter. By implementing this method, smaller values of the dc-link capacitor and FC can be used even in applications that could experience ripple or transient in the capacitor voltage. In a single-phase five-level ANPC converter applications, where the capacitors can experience pulsation power and dc-link balancing issues, such as gridconnected photovoltaic system, the selection of the reference voltage value for the FC can play an important role to balance the average values of the dc-link capacitor voltage. The proposed new control strategy uses a new reference voltage for the FC to be applied by the new modulator to have an average balanced dc-link voltages as well as an ac output voltage with good power quality. Simulation studies and experimental results demonstrate the effectiveness of the proposed modulation technique and control strategy even with relatively small dc capacitors to produce high-quality output voltage and current waveforms while maintaining an average balanced dc-link voltages.

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“…The redundancy in the switching states of the FC-based ANPC converter allows the voltage across FC to be regulated. To generate the switching pulses, a variety of strategies has been presented to generate the output voltage with reduced harmonics and simultaneously regulate the FC voltage of the converter such as Carrier-based PWM [4], modified triangular carrier-based PWM [5], selective harmonic elimination PWM (SHE-PWM) [6] and optimized pulse pattern [7]. The use of five-level vector PWM in three phase applications using switching redundancies to control FC voltages are presented in [8]- [10].…”

Section: Introductionmentioning

confidence: 99%

Novel modulation and control strategy for five-level ANPC converter with unbalanced DC voltage applied to a single-phase grid connected PV system

Teymour

Sutanto

Muttaqi

et al. 2013

2013 IEEE Industry Applications Society Annual Meeting

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This paper proposes a new control strategy and a novel modulation technique for a grid-connected photovoltaic (PV) system using a single-phase five-level flying capacitor (FC) based active-neutral-point-clamped (ANPC) converter. The proposed modulator can control the FC voltage to follow the requested reference value and simultaneously generate the required ac output voltage regardless of the values of the dc capacitor voltages of the converter. By implementing this method, smaller values of dc-link and flying capacitors can be used even in applications that could experience ripple or transient in the capacitors voltage. In the gridconnected single-phase five-level ANPC, where the capacitors can experience pulsation power and dc-link balancing issues, the selection of the reference voltage value for the FC can play an important role to balance the average values of the dc-link capacitors voltage. The proposed new control strategy uses a new reference voltage for the FC to be applied by the new modulator to have an average balanced dc-link voltages as well as an ac output voltage with good power quality. Simulation studies demonstrate the effectiveness of the proposed modulation technique and control strategy even with using relatively small dc capacitors to produce high quality output voltage and current and maintaining an average balanced dc-link voltages. quality. Simulation studies demonstrate the effectiveness of the proposed modulation technique and control strategy even with using relatively small dc capacitors to produce high quality output voltage and current and maintaining an average balanced dc-link voltages.

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Parameter design of a five-level inverter for PV systems

Cited by 19 publications

References 8 publications

Methodology for the optimal design of transformerless grid-connected PV inverters

Methodology for the optimal design of transformerless grid-connected PV inverters

A Novel Modulation Technique and a New Balancing Control Strategy for a Single-Phase Five-Level ANPC Converter

Novel modulation and control strategy for five-level ANPC converter with unbalanced DC voltage applied to a single-phase grid connected PV system

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