Power Loss Comparison of Single- and Two-Stage Grid-Connected Photovoltaic Systems

Wu, T.-F.; Chang, Chih-Hao; Lin, Li‐Yen; Kuo, Chia‐Ling

doi:10.1109/tec.2011.2123897

Cited by 248 publications

(87 citation statements)

References 15 publications

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“…It can be seen that a small perturbing step-size can contribute to a small voltage ripple and thus less power losses , but a slow transient [21]. In that case, a capacitor of smaller value can be adopted as the PV-side capacitor in a double-stage system [22]. However, as it is shown in Fig.…”

Section: B Capacitor Sizingmentioning

confidence: 99%

Mission profile translation to capacitor stresses in grid-connected photovoltaic systems

Yang

Wang

et al. 2014

2014 IEEE Energy Conversion Congress and Exposition (ECCE)

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Section: B Capacitor Sizingmentioning

confidence: 99%

Mission profile translation to capacitor stresses in grid-connected photovoltaic systems

Yang

Wang

et al. 2014

2014 IEEE Energy Conversion Congress and Exposition (ECCE)

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“…Several transformer-less inverters with MPPT have been proposed in [6,[37][38][39][40][41][42][43] for PV system to overcome the abovementioned problems. Most of these topologies have no doubly grounded features.…”

Section: Introductionmentioning

confidence: 99%

A Single Phase Doubly Grounded Semi-Z-Source Inverter for Photovoltaic (PV) Systems with Maximum Power Point Tracking (MPPT)

2014

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Abstract:In this paper, a single phase doubly grounded semi-Z-source inverter with maximum power point tracking (MPPT) is proposed for photovoltaic (PV) systems. This proposed system utilizes a single-ended primary inductor (SEPIC) converter as DC-DC converter to implement the MPPT algorithm for tracking the maximum power from a PV array and a single phase semi-Z-source inverter for integrating the PV with AC power utilities. The MPPT controller utilizes a fast-converging algorithm to track the maximum power point (MPP) and the semi-Z-source inverter utilizes a nonlinear SPWM to produce sinusoidal voltage at the output. The proposed system is able to track the MPP of PV arrays and produce an AC voltage at its output by utilizing only three switches. Experimental results show that the fast-converging MPPT algorithm has fast tracking response with appreciable MPP efficiency. In addition, the inverter shows the minimization of common mode leakage current with its ground sharing feature and reduction of the total harmonic distortion (THD) as well as DC current components at the output during DC-AC conversion.

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“…1(b)) consisting of DC-DC boost converter and DC-AC inverter can enlarge the MPPT operation range for PV grid-connected system. Using a DC-DC boost converter in front, the efficiency of whole inverter system would decrease since more passive and active components (IGBT, capacitor, inductor, diode) are involved in the energy processing when compared to the single-stage topology but when considering the improved MPPT efficiency and wide operation range the two-stage solution is superior to the single-stage inverter [5,6].…”

Section: Introductionmentioning

confidence: 99%

Fault Diagnosis and Fault-Tolerant Control of DC-link Voltage Sensor for Two-stage Three-Phase Grid-Connected PV Inverters

Kim

Lee

et al. 2013

Journal of Electrical Engineering and Technology

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-This paper proposes a method for fault diagnosis and fault-tolerant control of DC-link voltage sensor for two-stage three-phase grid-connected PV inverters. Generally, the front-end DC-DC boost converter tracks the maximum power point (MPP) of PV array and the rear-end DC-AC inverter is used to generate a sinusoidal output current and keep the DC-link voltage constant. In this system, a sensor is essential for power conversion. A sensor fault is detected when there is an error between the sensed and estimated values, which are obtained from a DC-link voltage sensorless algorithm. Faulttolerant control is achieved by using the estimated values. A deadbeat current controller is used to meet the dynamic characteristic of the proposed algorithm. The proposed algorithm is validated by simulation and experiment results.

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Power Loss Comparison of Single- and Two-Stage Grid-Connected Photovoltaic Systems

Cited by 248 publications

References 15 publications

Mission profile translation to capacitor stresses in grid-connected photovoltaic systems

Mission profile translation to capacitor stresses in grid-connected photovoltaic systems

A Single Phase Doubly Grounded Semi-Z-Source Inverter for Photovoltaic (PV) Systems with Maximum Power Point Tracking (MPPT)

Fault Diagnosis and Fault-Tolerant Control of DC-link Voltage Sensor for Two-stage Three-Phase Grid-Connected PV Inverters

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