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Abhinav Kumar

Bio: Abhinav Kumar is an academic researcher from Lovely Professional University. The author has contributed to research in topics: Supercritical fluid & Magnet. The author has an hindex of 3, co-authored 14 publications receiving 38 citations.

Papers
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Journal ArticleDOI
TL;DR: In this article, an algorithm is developed to estimate the recovery time of resistive type superconducting fault current limiter (R-SFCL) with three phases to be used in SMES.
Abstract: Energy storage devices experience load fluctuations due to fault currents, lightening and non-uniform load distribution. Hence, Superconducting Magnetic Energy Storage (SMES) devices are incorporated to balance these fluctuations as well as to store the energy with larger current density. Further, Superconducting Fault Current Limiter (SFCL) are integrated with SMES for avoiding fault currents. In addition, SFCL are preferred in electrical utility networks due to their better technical performance during faults as compared to the conventional Circuit Breakers. Self-triggering from superconducting state to normal state during fault and very fast recovery to its original superconducting state after fault removal is the fundamental operation of Resistive type Superconducting Fault Current Limiter (R-SFCL). Moreover, commercial applications of SFCL in electrical power systems are enormously increasing due to the availability of long length High Temperature Superconducting (HTS) tapes. In the present work, an algorithm is developed to estimate the recovery time of R-SFCL with three phases to be used in SMES. Further, the electrical and thermal strategies to develop R-SFCL are also presented. In addition, the short circuit behaviour under fault currents is investigated considering 440 kV/1.2 kA capacity line. Finally, the percentage of fault compensation in all the three phases of SMES integrated with R-SFCL is calculated.

21 citations

Journal ArticleDOI
TL;DR: In this paper, the effect of aspect ratio (solenoidal height to bore diameter ratio) on the normal component of the magnetic field has also been assessed in the superconducting domain and it has been concluded that it would be beneficial to operate at higher currents as it can reduce the total length of the superconductor.
Abstract: Due to fast response and high energy density characteristics, Superconducting Magnetic Energy Storage (SMES) can work efficiently while stabilizing the power grid. The challenges like voltage fluctuations, load shifting and seasonal load demands can be accomplished through HTS magnet as this device has a great potential to supply power for a time span varies from few seconds to hours. Solenoidal configuration has been widely employed (over toroidal) in the development of SMES prototypes as it is simpler to manufacture and allows an easier handling of the mechanical stresses imposed on the structure due to Lorentz forces. A micro-SMES of capacity 10 MJ can be employed to mitigate the challenges like load leveling, dynamic stability, transient stability, voltage stability, frequency regulation, transmission capability enhancement, power quality improvement, automatic generation control, uninterruptible power supplies, etc. In this work, solenoidal configuration has been engaged in the development of 10 MJ SMES Magnet using 2 G (SuperPower, YBCO having Tc = 90 K @0T) High Temperature Superconducting (HTS) tape. The superconducting tape has been cooled at 14 K using conduction cooling. The effect of maximum operating current (3250A, 2600A, 1950A and 1300A) on the inductance, maximum storable energy and length of superconductor has also been evaluated for a constant deliverable energy of 10 MJ. A numerical analysis is done on 10 MJ HTS SMES where perpendicular field of 3T has been considered. The effect of aspect ratio (solenoidal height to bore diameter ratio) on the normal component of the magnetic field has also been assessed. Lorentz forces (N/m3) have been evaluated in the superconducting domain. It has been concluded that it would be beneficial to operate at higher currents (i.e. more current through single tape) as it can reduce the total length of the superconductor. The perpendicular component of magnetic flux for the analysis is found to 2.96T which is less than 3T.

9 citations

Journal ArticleDOI
TL;DR: In this paper, a 2.5MJ SMES solenoidal magnet using 2G (SuperPower, YBCO having Tc=90K @ 0T) HTS tape has been evaluated.

8 citations

Proceedings ArticleDOI
27 Apr 2019
TL;DR: In this paper, a 2D numerical model has been developed where the effect of number of turns on the AC losses for magnet coils/stacks has been examined using SCS 12050 tape having 12mm width and critical temperature as 240 A. The model is being tested for a sinusoidal input having 50 Hz frequency for the full cycle.
Abstract: Coated conductors are widely employed in various power applications including superconducting motors, fault current limiters, energy storage, transmission and distribution systems etc. Ideal 2G (YBCO) superconductors are having almost zero resistance when cooled below 90K and can carry currents without loss. Coated conductors are made from Yttrium-Barium ceramic powder where stabilizer and substrate are being coupled together to strengthen the tape architecture. Practically, AC losses are found to occur when current is flowing through the tape and the losses are high when large currents flowing through the coated conductors. In this work, a 2D numerical model has been developed where the effect of number of turns on the AC losses for magnet coils/stacks has been examined using SCS 12050 tape having 12mm width and critical temperature as 240 A. The numerical model is based on H-formulations integrated with E-J Power law where homogenized approach has been proposed to estimate the magnetic flux density and AC losses. The model is being tested for a sinusoidal input having 50 Hz frequency for the full cycle.

4 citations

Journal ArticleDOI
TL;DR: In this article, one jet fuel surrogate (n-dodecane) which has been recognized as the constituent of real jet fuel is studied and thermophysical properties of each is evaluated in the supercritical regime.

3 citations


Cited by
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Journal ArticleDOI
01 Mar 2022-Energy
TL;DR: In this paper , the authors proposed an optimized forecasting model-an extreme learning machine (ELM) model coupled with the heuristic Kalman filter (HKF) algorithm to forecast the capacity of supercapacitors.

59 citations

Journal ArticleDOI
TL;DR: In this paper , a comprehensive overview of the applications of various energy storage technologies and evaluates their capabilities of mitigating the fluctuation and uncertainty of renewable energy, including superconducting magnetic energy, flywheel energy, redox flow batteries, compressed air energy storage, pump hydro storage and lithium-ion batteries.
Abstract: Given the urgency of climate change mitigation, it is crucial to increase the practical utilization of renewable energy. However, high uncertainty and large fluctuation of variable renewable energy create enormous challenges to increasing the penetration of renewable energy. Various energy storage technologies have been applied to renewable energy to handle the fluctuation and uncertainty problem. To enrich the knowledge about the effects of energy storage technologies, this paper performs a comprehensive overview of the applications of various energy storage technologies and evaluates their capabilities of mitigating the fluctuation and uncertainty of renewable energy. The main techno-economic characteristics of the energy storage technologies, including: super-conducting magnetic energy storage, flywheel energy storage, redox flow batteries, compressed air energy storage, pump hydro storage and lithium-ion batteries, are analyzed. Moreover, supercapacitor storage, sodium‑sulfur batteries, lead-acid batteries and nickel‑cadmium batteries are also discussed in this study.

47 citations

Journal ArticleDOI
TL;DR: The objectives of the paper are to determine and evaluate the fault current, variations in voltage and inter-area oscillations, ascertain the performance of suggested techniques at diverse fault-clearance times, and find out the finest control method for different kinds of faults.
Abstract: This paper presents a novel approach in two-area interconnected power system for enriching the transient stability at perturbations. The challenging task in the interconnected system is to equalize the power production and load demand without changing the system parameters. Therefore, a sophisticated controller of flexible alternating current transmission system (FACTS) called distributed power flow controller (DPFC) is suggested to the two-area power system for enhancing the system stability. Furthermore, the resistive type superconducting fault current limiter (SFCL) is also suggested to employ with DPFC for alleviating the fault current, and power quality issues. In this work, three cases are investigated by using without auxiliary, SFCL, unified power flow controller (UPFC), SFCL-UPFC, and SFCL-DPFC on two-area multi-machine system. The objectives of the paper are to determine and evaluate the fault current, variations in voltage and inter-area oscillations, ascertain the performance of suggested techniques at diverse fault-clearance times, and find out the finest control method for different kinds of faults. The simulation outcomes disclose that the coordination of SFCL and DPFC yielded finer outcomes over other control approaches.

20 citations

01 Jan 2011
TL;DR: In this article, a simulation of a synchronous generator with superconducting rotor windings is presented, where a finite element model is used to evaluate the transient response of the generator.
Abstract: In this work we present a simulation of a synchronous generator with superconducting rotor windings. As many other electrical rotating machines, superconducting generators are exposed to ripple fields that could be produced from a wide variety of sources: short circuit, load change, mechanical torque fluctuations, etc. Unlike regular conductors, superconductors, experience high losses when exposed to AC fields. Thus, calculation of such losses is relevant for machine design to avoid quenches and increase performance. Superconducting coated conductors are well known to exhibit nonlinear resistivity, thus making the computation of heating losses a cumbersome task. Furthermore, the high aspect ratio of the superconducting materials involved adds a penalty in the time required to perform simulations.The chosen strategy for simulation is as follows: A mechanical torque signal together with an electric load is used to drive the finite element model of a synchronous generator where the current distribution in the rotor windings is assumed uniform. Then, a second finite element model for the superconducting material is linked to calculate the actual current distribution in the windings of the rotor. Finally, heating losses are computed as a response to the electric load. The model is used to evaluate the transient response of the generator.

19 citations