Dc-dc converter topology assessment for large scale distributed photovoltaic plant architectures

Agamy, Mohammed; Todorovic, Maja Harfman; Elasser, Ahmed; Sabate, Juan; Steigerwald, R.L.; Jiang, Yan; Essakiappan, Somasundaram

doi:10.1109/ecce.2011.6063847

Cited by 27 publications

(13 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Commonly, the electricity demand was supplied by fossil fuels as oil, natural gas and coal; but the variability of electricity price, the rise of CO 2 emissions and the reduction of LS-PVPP of 100MW [22] inverter (dc-ac) is commonly used, and in two stages an additional dc-dc converter is connected [42,43]. The use of dc-dc converter in LS-PVPPs is still on research.…”

Section: Introductionmentioning

confidence: 99%

Topologies for large scale photovoltaic power plants

Cabrera-Tobar

Bullich‐Massagué

Aragüés‐Peñalba

et al. 2016

Renewable and Sustainable Energy Reviews

124

View full text Add to dashboard Cite

The concern of increasing renewable energy penetration into the grid together with the reduction of prices of photovoltaic solar panels during the last decade have enabled the development of large scale solar power plants connected to the medium and high voltage grid. Photovoltaic generation components, the internal layout and the ac collection grid are being investigated for ensuring the best design, operation and control of these power plants. This article addresses the review of components as photovoltaic panels, converters and transformers utilized in large scale photovoltaic power plants. In addition, the distribution of these components along this type of power plant and the collection grid topologies are also presented and discussed.

show abstract

Section: Introductionmentioning

confidence: 99%

Topologies for large scale photovoltaic power plants

Cabrera-Tobar

Bullich‐Massagué

Aragüés‐Peñalba

et al. 2016

Renewable and Sustainable Energy Reviews

124

View full text Add to dashboard Cite

show abstract

“…To increase its efficiency, the dc-dc full-bridge converter with partial power processing can be used, where only a partial of the generated power in the PV string flows through the full-bridge converter and the remaining power is directly fed forward to the output of the converter. However, this mode of operation leads to the loss of the benefit of the converter being an isolated topology [6].…”

Section: Centralized Topology String Topology Multistring Topology Momentioning

confidence: 99%

“…Efficiency can also be improved by operating the inductor in critical conduction mode [6]. In high frequency transformer topology, the full-bridge dcdc converter is the most used isolated topology, both as CSI or VSI.…”

Section: Centralized Topology String Topology Multistring Topology Momentioning

confidence: 99%

“…However, it has disadvantages at operating voltage range 800 -1,200 V where usually using the relatively low switching frequency, and consequently a large input inductor. In addition, it can not meet the efficiency requirements without adding auxiliary circuit for soft switching operations [6]. The basic topology of dc-dc boost converter is shown on Fig.…”

Section: Grid Connected Pv Array Topologymentioning

confidence: 99%

“…Currently, there has been developed more recent topology and more modular topology namely multistring converter topology with two-stage power conversion. This topology is based on string topology that considers a different power conditioning topology, the arrangement of series-parallel from different PV modules, and orientation to optimize costs and to maximize systems modularity and the power generated [6]. For medium-scale to large-scale PV systems where a large number of PV module must be connected to the grid, multistring topology is preferred because string PV has various types, size, modules orientation, can be connected to a different converter [1], [7], [8].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

High Performance Multistring Converter Topology for Three-Phase Grid Tied 200 kW Photovoltaic Generating System

Rustam

Wijaya

2017

IJITEE

View full text Add to dashboard Cite

Abstract---Under various external conditions, grid connected PV system performance is strongly affected by the topology that is used to connect a PV system with grid. This research aims to design a multistring based converter topology for three-phase grid connected 200 kW PV system that has a high performance in various operating conditions. Research was done by a simulation method using Matlab-Simulink with performance being evaluated including the generated power, efficiency, power quality in accordance with grid requirements, as well as the power flow. In the simulation, multistring converter topology was designed using two dc-dc boost multistring converters connected in parallel to a centralized of three-phase three-level NPC inverter with the size of the string being shorter and more parallel strings as well as the maximum voltage of the PV array of 273.5 V close to dc voltage reference of 500 V. Each dc-dc boost multistring converter have individual MPPT controllers. The simulation results showed that this multistring converter topology had a high performance in various operating conditions. This due to more power generated by the NPC inverter (> 190 kW) at the time of high power generation on the STC conditions (1000 W/m 2 , 25 o C), the lowest efficiency of the total system is 95.08 % and the highest efficiency of the total system is 99.4 %, the quality of the power generated in accordance with the requirements of grid, as well as the inverter put more active power to the grid and less reactive power to the grid. The response of the inverter slightly worse for loads with greater reactive power and unbalanced.Keywords---PV array topology, power electronics converter topology, maximum power, efficiency, power quality, power flow.

show abstract

Low‐leakage current two‐stage transformerless grid‐connected converter for residential PV application

Farswan

Datta

2019

IET Power Electronics

View full text Add to dashboard Cite

Conventional PV-fed three-level DC-DC converter has greater leakage current due to varying common mode (CM) voltage, and thus requires galvanic isolation if interfaced with on-grid inverters. To reduce the leakage current and eliminate the requirement of galvanic isolation, a low-leakage three-level DC-DC converter is proposed for residential application. Efficacy of the converter is demonstrated by proposing a two-stage single-phase on-grid PV system by interfacing with a three-level transformerless single-phase inverter topology. The DC-DC converter has reduced leakage current, which decreases the overall leakage current in the PV inverter system. In addition, smaller filter magnetics are required for both the three-level converter and three-level inverter. The CM analysis of the proposed system is presented. The proposed system is simulated using PSCAD and a laboratory prototype is developed for experimental evaluation. The experimental results show a part-load efficiency of >96% for the overall system. Furthermore, the measured leakage current in the proposed system is <10 mA, which is below the prescribed RMS limit, as specified in German DIN VDE 0126-1-1 standard.

show abstract

Dc-dc converter topology assessment for large scale distributed photovoltaic plant architectures

Cited by 27 publications

References 10 publications

Topologies for large scale photovoltaic power plants

Topologies for large scale photovoltaic power plants

High Performance Multistring Converter Topology for Three-Phase Grid Tied 200 kW Photovoltaic Generating System

Low‐leakage current two‐stage transformerless grid‐connected converter for residential PV application

Contact Info

Product

Resources

About