Study of the application of bidirectional dual active bridge converters in dc nanogrid energy storage systems

Silva, Waner Wodson A. G.; Donoso-Garcia, P.F.; Seleme, Seleme Isaac; Oliveira, Thiago Ribeiro de; Santos, Chad; Bolzon, A. S.

doi:10.1109/cobep.2013.6785178

Cited by 14 publications

(9 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These are optional in nanogrids, but they improve the stability. It further adds reliability and backup capacity for the residential load [89]. Figure 9 represents the grouping of nanogrids to form a microgrid.…”

Section: International Journal Of Photoenergymentioning

confidence: 99%

Variable Load Demand Scheme for Hybrid AC/DC Nanogrid

Rauf

Kalair

Khan

2020

International Journal of Photoenergy

View full text Add to dashboard Cite

This paper addresses the use of nanogrid technology in resolving the issue of blanket load shedding for domestic consumers. This is accomplished by using different load management techniques and load classification and utilizing maximum solar energy. The inclusion of DC-based load in basic load and DC inverter load in regular load and scheduling of the burst load during the hours of maximum solar PV generation bring novelty in this work. The term “nanogrid” as a power structure remains ambiguous in various publications so far. An effort has been done in this paper to present a concise definition of nanogrid. Demand side load management is one of the key features of nanogrid, which enables end users to know major characteristics about their energy consumption during peak and off-peak hours. A microgrid option with nanogrid facility results in a more reliable system with overall improvement in efficiency and reduction in carbon emission. PV plants produce DC power; when used directly, the loss will automatically be minimized to 16%. The AC/DC hybrid nanogrid exhibits 63% more efficiency as compared to AC-only nanogrid and nearly 18% more efficiency as compared to DC-only nanogrid. Smart load shifting smoothens the demand curve 54% more adequately than during conventional load shifting. Simulation results show that real-time pricing is more economical than flat rate tariff for a house without DG, whereas flat rate results are more economical when DG are involved in nanogrids. 12.67%-21.46% saving is achieved if only flat rates are used for DG in nanogrid instead of real-time pricing.

show abstract

Section: International Journal Of Photoenergymentioning

confidence: 99%

Variable Load Demand Scheme for Hybrid AC/DC Nanogrid

Rauf

Kalair

Khan

2020

International Journal of Photoenergy

View full text Add to dashboard Cite

show abstract

“…The use of photovoltaic (PV) systems in DC nanogrids is quite attractive due to the low maintenance and operating [9]. In this context, DC buses rated at 380 V are widely employed in several applications [19]- [21]. Since the PV modules typically provide low voltages rated between 20 V and 50 V, the series connection of PV modules is employed to obtain higher voltages, which allows the use of basic DC-DC converters in the interconnection between PV modules and the DC bus [22].…”

Section: Introductionmentioning

confidence: 99%

High-Voltage Gain DC-DC Converter For Photovoltaic Applications In DC Nanogrids

Pontes¹,

Silva²,

Sá³

2020

Eletrônica de Potência

View full text Add to dashboard Cite

Photovoltaic (PV) systems used in DC Nanogrids present prominent advantages associated with low maintenance need and operation costs. Owing to the low output voltage of the PV module, highly efficient high-voltage gain DC-DC converters are required for connection with the DC nanogrid. This work presents a novel DC-DC converter topology with current source characteristic for PV applications and current injection in DC nanogrids. The introduced converter uses coupled inductors and switched capacitors to achieve high voltage gain with low component count and without using extreme duty ratios. Besides, the main switch is turned on with nearly zero current, thus contributing to minimized switching losses. The qualitative and quantitative analyzes of the circuit are presented in detail and a prototype rated at 200 W is developed and evaluated in the laboratory. Experimental results demonstrate efficient renewable energy conversion, where the maximum efficiency is 96.8%.

show abstract

“…Based on reviews, among all the DC-DC converters, the DAB-IBDC converter provides an attractive solution by interconnecting different DC buses, particularly where a high power density with higher efficiency is required. Among the many researchers in the dc power conversion field, DAB-IBDC topology is the most popular converter because of its galvanic isolation, bi-directional power flow ability, buck/boost capability, high efficiency, handling high power density, and inherent soft switching property [15][16][17][18]. Moreover, it can be used in a wide range of applications, such as photovoltaic systems, energy storage systems, electric vehicles, renewable energies integration, and avionics applications.…”

Section: Introductionmentioning

confidence: 99%

Digital Soft Start Implementation for Minimizing Start Up Transients in High Power DAB-IBDC Converter

et al. 2018

View full text Add to dashboard Cite

Abstract:The dual active bridge isolated bidirectional DC-DC converter (DAB-IBDC) is one of the prime converters used in dual active bridge renewable energy storage system (RESS) applications, particularly where a high-power density is required. The digital DSP (Digital Signal Processer) control technique also provides intelligence to applications and achieves a super compact elegant system by reducing the complicated control hardware. All power converters, including the DAB-IBDC converter, often draw an inrush current, which is many times higher than their steady state current. The inrush current is the maximum current drawn by a converter for a very few milliseconds while being freshly energized. Although it appears for only a very few milliseconds, it can cause severe damage to the entire energy storage system, including the sources and loads. To save the RESS system from the starting inrush current and peak overshoot voltages, this paper proposes a five-phase digital soft-start control algorithm for a high-power DAB-IBDC converter that was implemented at a renewable energy storage system aimed at developing an intelligent self-powered energy zone. The proposed five phase digital soft-start algorithm can alone solve the startup transients without the use of any additional hardware. First, it prevents the output current and voltages from transients, such as the inrush current and peak overshoot voltages, by ensuring that the output current does not increase too rapidly while starting up. Second, it also eliminates the large backflow inrush current released by a partially discharged energy storage device at the starting period. Third, it helps achieve a simple super compact size DAB-IBDC converter with a simple elegant design by ensuring the control and soft-start in digital technology.

show abstract

Study of the application of bidirectional dual active bridge converters in dc nanogrid energy storage systems

Cited by 14 publications

References 13 publications

Variable Load Demand Scheme for Hybrid AC/DC Nanogrid

Variable Load Demand Scheme for Hybrid AC/DC Nanogrid

High-Voltage Gain DC-DC Converter For Photovoltaic Applications In DC Nanogrids

Digital Soft Start Implementation for Minimizing Start Up Transients in High Power DAB-IBDC Converter

Contact Info

Product

Resources

About