Thanks to the unique advantages such as long life cycles, high power density, minimal environmental impact, and high power quality such as fast response and voltage stability, the flywheel/kinetic energy storage system (FESS) is gaining attention recently. There is noticeable progress made in FESS, especially in utility, large-scale deployment for the electrical grid, and renewable energy applications. This paper gives a review of the recent developments in FESS technologies. Due to the highly interdisciplinary nature of FESSs, we survey different design approaches, choices of subsystems, and the effects on performance, cost, and applications. This review focuses on the state of the art of FESS technologies, especially for those who have been commissioned or prototyped. We also highlighted the opportunities and potential directions for the future development of FESS technologies.

A review of flywheel energy storage systems: state of the art and opportunities.

This study is based on energy harvesting from vibration and deals with the comparison of different techniques. In the present scenario, energy harvesting has drawn the attention of researchers due ...

https://www.worldscientific.com/doi/pdf/10.1142/S2010135X19300019

Vibration energy harvesting: A review

Potassium sodium niobate lead-free piezoelectric nanocomposite generators based on carbon-fiber-reinforced polymer electrodes for energy-harvesting structures

With the continuous expansion of power grid capacity, the problem of short-circuit current exceeding the standard is becoming increasingly serious. Fault current limiter is a promising solution and is gradually becoming a research hotspot. In this study, fault current limiters are classified into four categories. And saturated-core fault current limiters are emphatically introduced, including its working principle and comparison with the other three categories. Saturated core fault current limiters are divided into four branches according to the ways leading the core saturated. A comprehensive review of the research activities and emerging technologies of saturated-core fault current limiters for AC power systems is presented in this study. The working principle and typical structure of DC-biased-, permanent-magnet-, superconducting- and hybrid-type saturated-core fault current limiters are introduced. The advantages and disadvantages of four types of saturated core fault current limiters are compared in detail from the aspects of current-limiting performance, iron core size and DC magnetomotive force. Real grid application examples of some types of devices are presented, as well as new progress in the techniques, are covered and discussed in detail. One may find the content of this study helpful as a detailed literature review or as practical technical guidance.

Saturated-core fault current limiters for AC power systems: Towards reliable, economical and better performance application

Optimal synchronous vibration control for magnetically suspended centrifugal compressor

Performance of a modified magnetostrictive energy harvester in mechanical vibration

This paper represents the force calculation in a radial passive magnetic bearing using Monte Carlo technique with general division approach (s-MC). The expression of magnetic force is obtained using magnetic surface charge density method which incurs a multidimensional integration with complicated integrand. This integration is solved using Monte Carlo technique with 1-division (1-MC) and 2-division (2-MC) approaches with a MATLAB programming. Analysis using established methods such as finite element method (FEM), semi-analytical method, and adaptive Monte Carlo (AMC) method has been carried out to support the proposed technique. Laboratory experiment has been conducted to validate the proposed method. 2-MC gives better result than 1-MC. The computation time of the proposed method is compared with the quadrature method, FEM and AMC. It is observed that the proposed method invites less computational burden than those methods as the algorithm adaptively traverses the domain for promising parts of the domain only, and all the elementary regions are not considered with equal importance.

Calculation of passive magnetic force in a radial magnetic bearing using general division approach

This paper presents a consideration of the nonlinear modelling and vibration control of a hybrid magnetic bearing (HMB). The dynamics of the system are highly nonlinear in nature and exhibit parame...

Vibration control of a hybrid magnetic bearing using an adaptive sliding mode technique

This paper presents the ac impedance control of a superconducting fault current limiter (SFCL), along with the minimization of undesirable voltage spike across dc biasing coil. The nonlinear state space model of the SFCL is established with SFCL current as state variable, ac impedance as output, and dc biasing current as input variables. From this dynamic model, it is observed that the impedance can be controlled between a minimum value, when both the cores are saturated due to high dc biasing current and a maximum value when both the cores are unsaturated due to field suppression (FS) or switching off the dc biasing source. At the same time, the undesirable but inevitable voltage across dc coil due to FS can be reduced by controlling the stiffness of the dc control current. A high-frequency modified bang–bang type controller is designed and simulated. The simulation shows that the controller not only tracks the reference impedance very well, but also reduces the induced voltage across dc coil. The controlled SFCL impedance not only reduces the prospective fault current, but is also useful for relay coordination especially for impedance relays.

Tapan Santra

Papers

Performance of a modified magnetostrictive energy harvester in mechanical vibration

Calculation of passive magnetic force in a radial magnetic bearing using general division approach

Vibration control of a hybrid magnetic bearing using an adaptive sliding mode technique

Impedance Control of a Saturated Core Superconducting Fault Current Limiter With an Improved Field Suppression

Calculation of force between two ring magnets using adaptive monte carlo technique with experimental verification