Integration of Large Photovoltaic and Wind System by Means of Smart Transformer

Zhu, Rongwu; Carne, Giovanni De; Deng, Fujin; Liserre, Marco

doi:10.1109/tie.2017.2701758

Cited by 66 publications

(25 citation statements)

References 40 publications

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“…Zhu et al 49 proposes a parallel connection of a solid-state transformer-based smart transformer and CPT to reduce the power rating and to support the voltage amplitude and improve the grid current quality. Hossain et al 48 discusses challenges such as stability issues, complicated operating process, and remote control, in attempting the communication between renewable energy production and smart grid.…”

Section: Energy Efficiency and Renewable Energymentioning

confidence: 99%

“…Additionally, the magnetic characteristic of conventional power transformer (CPT) leads to high current harmonics when wind speed is low and irradiance is weak. Zhu et al 49 proposes a parallel connection of a solid-state transformer-based smart transformer and CPT to reduce the power rating and to support the voltage amplitude and improve the grid current quality.…”

Section: Energy Efficiency and Renewable Energymentioning

confidence: 99%

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A review on the features and technologies for energy efficiency of smart grid

Anjana¹,

Shaji

2017

Int J Energy Res

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Summary In today's world striving for efficiency in every sector, especially power generation and distribution, smart grids emerge as the solution for efficiently meeting the increasing demand. They adjust themselves to optimally deliver energy at the lowest cost and highest quality possible. The grid successfully makes use of renewable energy resources, electric vehicles, and smart pricing techniques in its attempt to achieve energy efficiency. It also promotes a greener environment by striving to reduce greenhouse gas emissions. Information communication technology (ICT) helps the grid in collecting consumption data from the consumers and in sharing tariff information. ICT also helps to gather information about the status of the grid with regard to aspects like power quality, faults etc. The purpose of this paper is to review recent literature with a view to comprehensively present the technologies employed in the smart grid for achieving energy efficiency and the challenges involved therein.

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Section: Energy Efficiency and Renewable Energymentioning

confidence: 99%

Section: Energy Efficiency and Renewable Energymentioning

confidence: 99%

A review on the features and technologies for energy efficiency of smart grid

Anjana¹,

Shaji

2017

Int J Energy Res

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“…The ST commonly consists of AC-DC rectifier, DC-DC converter and DC-AC inverter [2]. This structure can also provide the DC port to integrate the DC subsystems, i.e., renewable energy sources [3], electric energy storages [4,5] and electric vehicle charger stations [6]. Active control of the ST manages the power flow between the subsystems [7].…”

Section: Introductionmentioning

confidence: 99%

Methodology for Assessment of the Impact of Smart Transformers on Power System Reliability

Chen

Nouri

Keane

et al. 2019

IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society

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The smart transformer (ST) has been proposed as an alternative to the traditional low frequency transformer as a means to provide extra control functionality in the smart power system. The ST has merits in terms of reactive power decoupling and voltage decoupling at the primary and secondary side. This provides flexibility for reactive power compensation in the transmission system and demand reduction in the distribution system. Using its ability to control demand through voltage regulation, the ST provides the possibility to reduce demand while keeping the entire load online, which can provide an alternative to load curtailment. Thus, it may provide a means to improve power system reliability. However, no of previous research has investigated these potential system reliability benefits of the ST. The paper presents a methodology which can be used to quantify the system reliability impacts of the use of STs as an interface between the transmission and distribution systems. Using the methodology, the ST impacts on the system reliability are assessed using the IEEE 39-bus system as an example.

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“…In MV grid, the ST can perform grid current congestion, power factor correction, harmonics mitigation [9], [10]. By providing reactive power in MV grid, the ST can also support MV grid voltage performance, similarly to the STATCOM [11], [12]. This paper compares the performances and cost between the STATCOM and ST as a guide for design of ancillary services.…”

Section: Introductionmentioning

confidence: 99%

Comparison of voltage support services by means of STATCOM and smart transformer in medium voltage grid

Gao

Zhu

Carne

et al. 2018

2018 13th IEEE Conference on Industrial Electronics and Applications (ICIEA)

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Due to the increasing demand of electrical energy, especially in urban areas, the traditional distribution power grid reaches its limitations of operation (e.g. large current flow or voltage deviation). The distribution grid needs to be upgraded to ensure stability margin of operation. Since the cost of space is expensive and there is also resistance against installation of extra equipment from local resident, to install new equipment in distribution grid becomes difficult. The choice of new device to support the grid must consider not only the services but also the cost of equipment and space. The devices based on power electronics (STATCOM, smart transformer (ST)) are able to provide ancillary services such as voltage support to medium voltage (MV) distribution grid. In this paper, the ST is analyzed and compared with the STATCOM in terms of cost and performance. By means of literature review and simulation, the performance of ST has been analyzed. The result shows that the ST provides more services to assist the control in distribution grid than STATCOM. In order to achieve the same performance of voltage support, the investment of ST is less. Index Terms-Smart Transformer, voltage support in distribution grid, reactive power control, MV grid control, STATCOM.

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Integration of Large Photovoltaic and Wind System by Means of Smart Transformer

Cited by 66 publications

References 40 publications

A review on the features and technologies for energy efficiency of smart grid

A review on the features and technologies for energy efficiency of smart grid

Methodology for Assessment of the Impact of Smart Transformers on Power System Reliability

Comparison of voltage support services by means of STATCOM and smart transformer in medium voltage grid

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