Development of Superconducting Cable With Energy Storage Function and Evaluation of its Functionality in DC Microgrid With Renewable Energy Sources

Higashikawa, Kohei; Ide, Akihito; Bian, Wenhao; Kiss, Takanobu

doi:10.1109/tasc.2023.3243566

Cited by 4 publications

(1 citation statement)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Energy saving and emission reduction is always the goal of future technology development. Recently, the distributed generation system and micro-grid technology is paid lots of attention to by researchers [1][2][3][4][5]. Renewable sources such as solar modules and fuel cells provide DC voltage.…”

Section: Introductionmentioning

confidence: 99%

A cascaded three‐level buck‐LLC DC/DC converter with high power density for high‐frequency applications

Ji,

Lou,

Hong

et al. 2023

IET Power Electronics

View full text Add to dashboard Cite

In distributed generation systems, converters play a vital role and DC/DC converter technology is constantly being promoted with the increasing demand for electrical equipment in various industries. A cascaded topology of DC/DC converter has been proposed in this paper, named three‐level Buck‐LLC(TL‐BLLC) converter. In the proposed TL‐BLLC, Buck and LLC circuit are cascaded by a switch and a diode, so that the input voltage of the LLC can be adjusted to three levels. The stability of the output voltage of the whole system depends on the three‐level weight, so the LLC works at fixed frequency, which simplifies the control and ensures the efficiency. At the same time, compared with the traditional cascaded Buck‐LLC, this structure can reduce the processing power and reduce the size of passive elements of the previous Buck. Finally, a 980 W experimental prototype was established and the results of the experiment verified the correctness of the theoretical analysis.

show abstract

Section: Introductionmentioning

confidence: 99%

A cascaded three‐level buck‐LLC DC/DC converter with high power density for high‐frequency applications

Ji,

Lou,

Hong

et al. 2023

IET Power Electronics

View full text Add to dashboard Cite

show abstract

RETRACTED ARTICLE: Significantly enhanced critical current density and pinning force in nanostructured, (RE)BCO-based, coated conductor

Goyal,

Kumar,

Yuan

et al. 2024

Nat Commun

View full text Add to dashboard Cite

High-temperature superconducting wires have many large-scale, niche applications such as commercial nuclear fusion as well as numerous other large-scale applications in the electric power industry and in the defense, medical and transportation industries. However, the price/performance metric of these coated conductor wires is not yet favorable to enable and realize most large-scale applications. Here we report on probing the limits of J c (H, T) possible via defect engineering in heteroepitaxially deposited high-temperature superconducting thin-films on coated conductor substrates used for long-length wire fabrication. We report record values of J c (H, T) and pinning force, F p (H, T) in (RE)BCO films with self-assembled BaZrO 3 nanocolumns deposited on a coated conductor substrate. A J c of ~190 MA/cm 2 at 4.2 K, self-field and ~90 MA/cm 2 , at 4.2 K, 7 T was measured. At 20 K, J c of over 150 MA/cm 2 at self-field and over 60 MA/cm 2 at 7 T was observed. A very high pinning force, F p , of ~6.4 TN/m 3 and ~4.2 TN/m 3 were observed at 7 T, 4.2 K and 7 T, 20 K respectively. We report on the highest values of J c and F p obtained to date for all fields and operating temperatures from 4.2 K to 77 K. These results demonstrate that significant performance enhancements and hence far more favorable price/performance metrics are possible in commercial high-temperature superconducting wires.

show abstract

Superconducting cable with energy storage function and its potential for next-generation power system compatible with large-scale renewable energy installation

Higashikawa,

Kiss,

Kitaguchi

et al. 2024

Supercond. Sci. Technol.

View full text Add to dashboard Cite

The mass introduction of renewable energy is essential to realize a sustainable society. On the other hand, when photovoltaic and wind power generation are used as main power sources in a power system, it is indispensable to compensate for their severe output fluctuations up to the rating of the power system; however, this is difficult to achieve with conventional energy storage devices alone. To solve this problem, we have proposed a superconducting cable with energy storage function and its use in a DC power system. This cable provides large inertia to the power system without the need for additional energy storage equipment; as a result, the power system itself become capable of high-speed and high-power compensating operations for output fluctuations from renewable energy sources. This paper summarizes our recent works on this research topic: an overview of the proposal, conceptual design of the cable, experimental verification of the principle, and positive effects on the energy use efficiency of renewable energy. For example, an experiment with the use of a small model cable showed the capability of high-speed charge-discharge operations at a high power up to the rating of the microgrid. It was also showed that such a function was indispensable for real-time use of electric power from photovoltaic power generation resulting in significant enhancement of energy use efficiency of renewable energy. These results suggests that this concept hold the key to next-generation power systems enabling massive use of renewable energy in the future society.

show abstract

Development of Superconducting Cable With Energy Storage Function and Evaluation of its Functionality in DC Microgrid With Renewable Energy Sources

Cited by 4 publications

References 12 publications

A cascaded three‐level buck‐LLC DC/DC converter with high power density for high‐frequency applications

A cascaded three‐level buck‐LLC DC/DC converter with high power density for high‐frequency applications

RETRACTED ARTICLE: Significantly enhanced critical current density and pinning force in nanostructured, (RE)BCO-based, coated conductor

Superconducting cable with energy storage function and its potential for next-generation power system compatible with large-scale renewable energy installation

Contact Info

Product

Resources

About