Energy Harvesting Comparison and Analysis in 1000V and 1500V Grid-Connected PV Systems

Stevanovic, Branislav; Serban, Emanuel; Vasić, Miroslav; Ordonez, Martin; Cobreces, Santiago; Alou, P.

doi:10.1109/ecce44975.2020.9236312

Cited by 9 publications

(5 citation statements)

References 21 publications

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“…Figure 4 shows the RMS inductor current ripple (⟨∆i pp,rms ⟩ Tsw ) over the line cycle. Two different conditions are considered: with n − o connection and without n − o connection, both cases with sinusoidal pulsed-width modulation (SPWM), according to expression (1).…”

Section: Current Inductor Ripple On 2-level Three Phase Invertersmentioning

confidence: 99%

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Magnetic Design of a 3-Phase SiC-Based PV Inverter With DC-Link Referenced Output Filter

et al. 2023

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The use of Silicon carbide (SiC) devices represents an improvement in terms of size, weight and efficiency of power converters. However, SiC-based solutions present high dv/dt and di/dt on the switching events, increasing the common-mode noise injected into the grid. To reduce the common-mode noise, three-phase inverters with a DC-link referenced output filter are widely considered in photovoltaic (PV) inverters connected to the grid. However, if the filter is DC-link referenced the inductor ripple is larger, and this must be considered for the AC inductor filter design. This work shows, on a PV inverter, the impact of that DC-link referenced filter on the current ripple of the inductor, and the improvement achieved with the use of SiC devices, increasing the switching frequency. A comparison in terms of weight, size, losses and materials costs is presented for different core materials and configurations.

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Section: Current Inductor Ripple On 2-level Three Phase Invertersmentioning

confidence: 99%

“…However, with the increase of DC voltage up to 1500 V, 690 V AC or even 800 V AC have appeared on the market. With this increment in the voltage it is possible to manage higher power installation points without increasing the current, and therefore the employed copper [1]- [3].…”

Section: Introductionmentioning

confidence: 99%

Magnetic Design of a 3-Phase SiC-Based PV Inverter With DC-Link Referenced Output Filter

et al. 2023

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“…The benefits of the 1500-V PV technology over the 1000-V one have been proved by many studies [7]- [12]. Applying the 1500-V PV strings offers opportunities to reduce the installation cost (less cabling and combiner boxes), which is associated with the decrease of current ratings in different installation points [7]- [9].…”

Section: Introductionmentioning

confidence: 99%

“…In [11], the impact of different DC voltages on the PV inverter performance is presented, where the 1500-V and 2000-V PV inverters show better performance in efficiency and power density when compared with the 1000-V PV inverter. The work in [12] compares the energy harvesting for different DC and AC voltage levels and converter architectures (i.e., single-stage and two-stage), which mainly focuses on the energy losses in the PV converters. However, none of the previous studies have analyzed the impact of different DC and AC voltage ratings and installation sites on the system performance.…”

Section: Introductionmentioning

confidence: 99%

Performance Comparison of PV Inverter Systems Considering System Voltage Ratings and Installation Sites

Sangwongwanich

Yang

et al. 2021

2021 IEEE Applied Power Electronics Conference and Exposition (APEC)

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Currently, string photovoltaic (PV) inverters with wide DC and AC operating voltage ranges are available on the market, which can be employed for interfacing either 1000-V or 1500-V PV strings with different AC grid voltage levels (e.g., 400 V or 690 V). The selection of both the DC-and AC-side voltage levels should be carefully considered during the design phase. In this context, this paper compares the performance of PV systems using centralized string inverter solutions. The comparison is carried out by evaluating the power losses on each component (e.g., DC wire, inverter, AC filter, and transformer) of a 1.8-MW PV system considering different system voltage ratings and installation sites (mission profiles in Denmark and Sacramento, California). The evaluation results reveal that the impact of system voltage ratings on the energy yield of the PV system varies with mission profiles. Higher DC and AC voltage ratings can contribute to considerable energy loss reduction in both cases. However, in the cold climate, e.g., Denmark, the energy yield is more sensitive to the DC-bus voltage range, where the 1500-V PV system tied to a lower AC grid voltage (e.g., 400 V) can achieve higher energy yield.

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“…1500-V photovoltaic (PV) systems are increasingly employed in utility-scale power plants to achieve lower installation costs [1]- [4]. Notably, the single-stage approach based on three-level neutral point clamped (3L-NPC) inverters, as shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Discontinuous Modulation for Improved Thermal Balance of Three-Level 1500-V Photovoltaic Inverters under Low-Voltage Ride-Through

Sangwongwanich

Yang

et al. 2021

2021 IEEE Energy Conversion Congress and Exposition (ECCE)

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This paper investigates the thermal behavior of a 90-kW/1500-V, three-level, neutral-point-clamped (3L-NPC), singlestage PV inverter during low-voltage ride-through (LVRT) operation. To improve thermal performance during LVRT operation, a modified discontinuous pulse-width modulation (DPWM) scheme is proposed in this paper. As a major outcome, we concluded that, with the proposed scheme, the thermal stress is distributed more equally among the power devices compared to that with the conventional strategy. Simulation and experimental results are presented to assess the effectiveness of the proposed DPWM.

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Energy Harvesting Comparison and Analysis in 1000V and 1500V Grid-Connected PV Systems

Cited by 9 publications

References 21 publications

Magnetic Design of a 3-Phase SiC-Based PV Inverter With DC-Link Referenced Output Filter

Magnetic Design of a 3-Phase SiC-Based PV Inverter With DC-Link Referenced Output Filter

Performance Comparison of PV Inverter Systems Considering System Voltage Ratings and Installation Sites

Discontinuous Modulation for Improved Thermal Balance of Three-Level 1500-V Photovoltaic Inverters under Low-Voltage Ride-Through

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