Multilevel Converters for Step-Up-Transformer-Less Direct Integration of Renewable Generation Units with Medium Voltage Smart Microgrids

Islam, Md. Rabiul; Guo, Youguang; Zhu, Jun

doi:10.1007/978-981-4585-30-9_5

Cited by 10 publications

(4 citation statements)

References 25 publications

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“…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 ]. However, studies are being conducted in recent years to eliminate the needs of transformers in medium voltage grids in order to reduce transmission losses incurred from stepping up the voltages required for transmission [ 39 , 41 ]. Wind Farm Collection Points or Point of Common Coupling: The point of common coupling (PCC) is a connecting ground of all the turbines of a wind farm.…”

Section: Components Of Wecsmentioning

confidence: 99%

“… Wind Farm Collection Points or Point of Common Coupling: The point of common coupling (PCC) is a connecting ground of all the turbines of a wind farm. The preferred mode of connection in the wind farms is a parallel connection, which facilitates either maintaining a desired potential difference or having a defined node for connecting more turbines if necessary [ 41 ]. …”

Section: Components Of Wecsmentioning

confidence: 99%

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

et al. 2022

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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.

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Section: Components Of Wecsmentioning

confidence: 99%

Section: Components Of Wecsmentioning

confidence: 99%

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

et al. 2022

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“…For that purpose, the role of EVs is used. It is a private transport sector to reduce their pollution emissions and in order to improve the energetic efficiency of the vehicles [88]. In this context, due to their zero emissions and lower environmental impact, EVs have been a promising alternative to conventional cars with combustion engines [89].…”

Section: Development and Testing Applications In M‐mcmentioning

confidence: 99%

Modular‐multilevel converter topologies and applications – a review

Priya

Ponnambalam

Muralikumar

2019

IET Power Electronics

118

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Recently developed modular-multilevel converter (M-MC) has a major attention in the industry and research works which is moving into feasible technology for many medium and high-power applications. M-MCs have been improved by existing power conversion technology in several aspects, including efficiency, modular structure, power quality, transformerless operational capability, fault tolerant and redundancy operations having a low expense, standard components utilisation, high availability, excellent quality of output wave forms. However, as several challenges combined with M-MC topologies, include reduced voltage stress, compact size, and substantially lower semiconductor losses. These attributes the lower operating cost for high-power applications such as distribution systems and high-voltage direct current (HVDC) transmission systems. The main contribution of this study is to bring the scrutiny of M-MC applications and different circuit topologies. These M-MC configurations consist of converter structures with sub-module converters and M-MC family members. In such a way, the M-MC applications are generalised and it results the size and cost halved, reduced conduction and switching losses and increases system reliabilities. Moreover, in each application of M-MC, drawbacks, and advantages have been discussed in detail. This review presents the latest performance of M-MC with respect to the mentioned research areas and new applications.

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“…However, the rise in NPC levels considerably increases the number of clamping diodes. [9], [10]. The inverse retrieval times of the clamping diode render this topology not feasible to develop a medium voltage converter of high level [11].…”

Section: Developments In DC To Ac Power Converter Topologiesmentioning

confidence: 99%

Technological Developments in Direct Grid Connected Power Converters for Solar PV Power Plants

Kumar¹,

Ganesh²

2019

IJEAT

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Most of the countries in the world are concentrating on renewable energy generation, due to day-day increase in population increasing the energy demand, also to make their environment sustainable. With the many of features, use of megawatts rating solar photovoltaic (PV) power plants are becoming more popular for upgrading the existing power generation throughout the world. Moreover, among the existing renewable energy generations, solar power is the primary choice to meet the rapidly increasing demands; since solar PV plant installing time is relatively quick, say about in 3- 4 months, compared to conventional (thermal, hydro & diesel) plants which may require about 3-4 years. The low voltage (270‒700V) power converters require a filter and a step-up transformer for interconnecting the local grids with solar PV power plants. The advances in power converters without transformers and filters have recently become more attractive for solar PV power plants connected directly to grid. The study of this article describes the essential requirement and the technological developments in the design of power electronics converters, together with their modulation schemes to integrate solar power directly with standard power grid. This article, review ongoing research activities and the probable directions for the future research in developing inverters for cost-efficient grid connected solar PV plants

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Multilevel Converters for Step-Up-Transformer-Less Direct Integration of Renewable Generation Units with Medium Voltage Smart Microgrids

Cited by 10 publications

References 25 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

Modular‐multilevel converter topologies and applications – a review

Technological Developments in Direct Grid Connected Power Converters for Solar PV Power Plants

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