A Step-Up Transformerless, ZV–ZCS High-Gain DC/DC Converter With Output Voltage Regulation Using Modular Step-Up Resonant Cells for DC Grid in Wind Systems

Abbasi, Mehdi; Lam, John

doi:10.1109/jestpe.2017.2656919

Cited by 37 publications

(16 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The power converter transforms the output voltage from AC to DC using a rectifier and again the rectified DC to AC, having a constant voltage and frequency in subsequent steps using inverter circuit [ 36 , 38 ]. Step-up Transformer: The output from the generator in a grid connected MW turbine is rather low, in the range of 400 to 690 volts, which requires it to be stepped up since the grid connects directly to the high-tension lines [ 39 ]. The necessity of a step-up transformer can be annihilated by designing the generator and power electronic converter according to the wind farm collection point voltage, however it demands additional costs for medium voltage generator and power converter setup, diminishing the economic benefits of removing a step-up transformer from the circuit [ 40 ].…”

Section: Components Of Wecsmentioning

confidence: 99%

Energy Conversion Strategies for Wind Energy System: Electrical, Mechanical and Material Aspects

et al. 2022

View full text Add to dashboard Cite

Currently, about 22% of global electricity is being supplemented by different renewable sources. Wind energy is one of the most abundant forms of renewable energy available in the atmospheric environment due to different air-currents spread over the troposphere and stratosphere. The demand of modern wind energy conversion system (WECS) has increased to achieve a suitable alternate renewable energy source. In this paper, after a brief introduction, the classification of WECS is reviewed with attractive illustrations. The various mechanical materials and electrical components of WECS are discussed. The flow of power in WECS and its control strategies are also been described. The wind energy conversion is carried out with a suitable controlling mechanism for power grid integration. A maximum power-point tracking controller is an effective controlling method to extract the maximum possible power from the turbines. The present trends in WECS and the scope for improvement and future prospects are discussed. The materials used for both the blade and generator have been found to be key elements of wind turbines. Recycling of the polymer matrix composite materials are found to be a great threat to wind power plants, as well as to their supply chain industries.

show abstract

Section: Components Of Wecsmentioning

confidence: 99%

Energy Conversion Strategies for Wind Energy System: Electrical, Mechanical and Material Aspects

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Other DC/DC converter topologies for WTGs and also for application on the off‐shore platform to step‐up the MVDC collector grid voltage to HVDC transmission grid voltage have been proposed in the literature [17, 18]. The authors in [17] propose a DC/DC converter by combining resonant circuits and switching configurations. This result in an increased step‐up ratio; however, the approach is more complex than that of SAB and DAB.…”

Section: DC Wind System With Multiphase Hgmentioning

confidence: 99%

“…The authors in [15, 16] have proposed a wind power system with an MVDC collector gird, an HVDC transmission grid, and a simplified WTG system. The wind turbine in [17, 18] includes two main components: (i) a nine‐phase hybrid generator (HG) with nine‐phase stator winding and double rotor topology and, (ii) a nine‐leg passive rectifier. In the approach presented in [15, 16], active power electronics and AC transformers in the wind turbine are eliminated, which leads to a system amenable to higher voltages with reduced mass, cost and complexity.…”

Section: Introductionmentioning

confidence: 99%

Wind turbine multiphase operational trajectory in an all‐DC wind generation system

Beik

Al-Adsani

2020

IET Renewable Power Generation

View full text Add to dashboard Cite

“…The replacement of heavy low-frequency transformers by DC-DC converters with or without galvanic isolation through medium or high-frequency transformers that enable higher operating frequency is particularly used in compacting the system footprint [2], [5]. In addition, MVDC grids facilitate lower conduction losses since they generate lower current levels than MVAC grids do [2], [6]. MVDC grids put an end to the high AC cables since the cross-sectional area of the cables in MVDC grids depends on the thermal limits.…”

Section: Introductionmentioning

confidence: 99%

“…That leads to high efficiency and adhering to the softswitching characteristic in case of bidirectional power flow [5], [12]. However, non-isolated topologies can also provide high efficiency with zero voltage switching (ZVS) and/or zero current switching (ZCS) [6]. This work provides a review for MV DC-DC converters which are classified based on their structure, as shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Isolated and Nonisolated DC-to-DC Converters for Medium-Voltage DC Networks: A Review

Alhurayyis¹,

Elkhateb²,

Morrow³

2021

IEEE J. Emerg. Sel. Topics Power Electron.

115

View full text Add to dashboard Cite

MVDC technology is a promising solution to avoid installation of new AC networks. MVDC can provide optimum integration of large-scale renewable energy sources, the interconnection of different voltage levels of DC and AC grids with the ancillary services. The development in MVDC depends significantly on the DC-DC converters. Such converters support the modern trends of utilising medium-frequency transformers in power networks. Research on isolated converters technology is in its infancy and limited by the conversion ratio and component ratings. Besides, there is no standards exist covering specific aspects of isolated converter product. Thus, a review of such converters is needed. This work presents, for the first time, a review of the DC-DC power converter families in MVDC grids including the leading families which are isolated and nonisolated converters, as well as other subfamilies comparing the specifications and characteristics. Also, the applications of these converters are provided by focusing on the essential requirements for each application. Index Terms-MVDC grids, DC-DC power converters, dual active bridge (DAB), multilevel converter. TABLE I RECOMMENDED CLASSES FOR MVDC VOLTAGE MVDC Class (kV) Nominal Rated Voltage (kV) Maximum Rated Voltage (kV)

show abstract

A Step-Up Transformerless, ZV–ZCS High-Gain DC/DC Converter With Output Voltage Regulation Using Modular Step-Up Resonant Cells for DC Grid in Wind Systems

Cited by 37 publications

References 29 publications

Energy Conversion Strategies for Wind Energy System: Electrical, Mechanical and Material Aspects

Energy Conversion Strategies for Wind Energy System: Electrical, Mechanical and Material Aspects

Wind turbine multiphase operational trajectory in an all‐DC wind generation system

Isolated and Nonisolated DC-to-DC Converters for Medium-Voltage DC Networks: A Review

Contact Info

Product

Resources

About