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Topic Review
Microgrid Applications
Microgrids need control and management at different levels to allow the inclusion of renewable energy sources. In this paper, a comprehensive literature review is presented to analyse the latest trends in research and development referring to the applications of predictive control in microgrids. As a result of this review, it was found that the application of predictive control techniques on microgrids is performed for the three control levels and with adaptations of the models in order to include uncertainties to improve their performance and dynamics response. In addition, to ensure system stability, but also, at higher control levels, coordinated operation among the microgrid’s components and synchronised and optimised operation with utility grids and electric power markets. Predictive control appears as a very promising control scheme with several advantages for microgrid applications of different control levels.
  • 3.4K
  • 28 Oct 2020
Topic Review
Hydrogen-Based Hybrid Microgrid System
Hydrogen is acknowledged as a potential and appealing energy carrier for decarbonizing the sectors that contribute to global warming, such as power generation, industries, and transportation. Many people are interested in employing low-carbon sources of energy to produce hydrogen by using water electrolysis. Additionally, the intermittency of renewable energy supplies, such as wind and solar, makes electricity generation less predictable, potentially leading to power network incompatibilities. Hence, hydrogen generation and storage can offer a solution by enhancing system flexibility. Hydrogen saved as compressed gas could be turned back into energy or utilized as a feedstock for manufacturing, building heating, and automobile fuel.
  • 3.4K
  • 10 Nov 2022
Topic Review
Environmental Aspects of the Electric Car
Electric cars (or electric vehicles, EVs) have different environmental impacts compared to conventional internal combustion engine vehicles (ICEVs). While aspects of their production can induce similar, less or alternative environmental impacts, some models produce little or no tailpipe emissions, and some have the potential to reduce dependence on petroleum and greenhouse gas emissions, depending on the source of electricity used to charge them, and health effects from air pollution. Electric motors are significantly more efficient than internal combustion engines and thus, even accounting for typical power plan efficiencies and distribution losses, less energy is required to operate an EV. Producing batteries for electric cars requires additional resources and energy, so they may have a larger environmental footprint from the production phase. EVs also generate different impacts in their operation and maintenance. EVs are typically heavier and could produce more tire, brake, and road dust, but their regenerative braking could reduce brake particulate pollution. EVs are mechanically simpler, which reduces the use and disposal of engine oil.
  • 3.4K
  • 30 Nov 2022
Topic Review
Operating Principles of Fiber Bragg Grating Sensors
Fiber Bragg gratings (FBG) sensors are increasingly commercially available and are, one of the most popular sensors from the fiber optic sensing family, having found use in a variety of industrial and research applications. A conventional FBG sensor is made up of a specially fabricated small and flexible segment imprinted into the core of a single-mode optical fiber.
  • 3.4K
  • 14 Dec 2022
Topic Review
Solid State Transformers in Distribution System
Solid State Transformer (SST) is considered to be the most suitable and appropriate conversion device to replace the traditional prevailing transformer. In this device, the weight/volume savings, extensive efficiency enhancement and above all, the cost economization are taken to be the hallmarks. SST configuration comprises of three main stages (i.e., a rectifier, isolation through the HF transformer and finally the DC-AC converter to reproduce line frequency AC).
  • 3.3K
  • 01 Dec 2022
Topic Review
Plug-in Electric Vehicles in Japan
The fleet of light-duty plug-in electric vehicles in Japan totaled about 303,000 highway legal plug-in electric vehicles in circulation at the end of 2019, consisting of 152,320 all-electric passenger cars, 141,680 plug-in hybrids, and 8,720 light-commercial vehicles. The rate of growth of the Japanese plug-in segment slowed from 2013, with annual sales falling behind Europe, the U.S. and China since then. The segment market share fell from 0.68% in 2014 to 0.59% in 2016. Then the market share increased to 1.2% in 2017, and fell to 1.1% in 2018, and to 0.9% in 2019. Norway surpassed Japan as the country with the third largest plug-in car stock in use in 2019. The decline in plug-in car sales reflects the Japanese government and the major domestic carmakers decision to adopt and promote hydrogen fuel cell vehicles instead of plug-in electric vehicles, although the first commercially produced hydrogen fuel cell automobiles began in 2015. (As of April 2018), the Nissan Leaf all-electric car ranked as the all-time top selling plug-in electric vehicle in the country, with over 100,000 units sold since December 2010. Ranking second is the Mitsubishi Outlander P-HEV with 34,830 units delivered through August 2016, followed by the Toyota Prius PHV with 22,100 units sold through April 2016. (As of December 2012), Japan was the country with the highest ratio of quick charging points to electric vehicles (EVSE/EV), with a ratio of 0.030 (As of December 2012). The country's charging infrastructure included 1,381 public quick-charge stations and around 300 non-domestic slow charger points. The Japanese government has set up a target to deploy 2 million slow chargers and 5,000 fast charging points by 2020.
  • 3.3K
  • 04 Oct 2022
Topic Review
Failure Modes of the Electric Motors
The reliability assessment of electric machines plays a very critical role in today’s engineering world. The reliability assessment requires a good understanding of electric motors and their root causes. Electric machines mostly fail due to mechanical problems and bearing damage is the main source of this. The bearings can be damaged by mechanical, electrical, and thermal stresses. Among all stresses, the researcher should give special attention to the electrical one, which is bearing current and shaft voltage.
  • 3.3K
  • 21 Jun 2023
Topic Review
Beam-Squinting Effect in Broadband Mobile Communication
Due to the fact that the quality of the received signal is adversely affected by the beam squint phenomenon, which is especially pertinent to the millimeter wave (mmwave) bands, many studies have been utilised by other researchers to provide light on some of the challenges that come with analysing this type of occurrence. Squint causes several issues, the most important of which are its detrimental effects on gain, line of sight, angle of arrival, progressive phase, usable bandwidth, and fading effect. As a result of these obstacles, the advantages of adopting a high-frequency band such as mmwave in modern wireless communication systems are severely limited.
  • 3.3K
  • 06 Feb 2023
Topic Review
Types of Faults on Switchgear
Switchgear is generally known as a switching device. It is used for circuit isolation and the protection of power systems from overload and system faults. The definition of switchgear also includes devices that are utilized to regulate, meter, and control power systems. The term refers to switching and interrupting devices, as well as their combinations with control, instrumentation, metering, protective, and regulating devices, as well as the components of devices involved in dealing with interconnections, items, and supporting structures, which are used primarily in the generation, transmitting distribution, and conversion of electrical power.
  • 3.3K
  • 23 Sep 2022
Topic Review
Three Phase Induction Motor Drive
An induction motor is generally used in industrial applications because it is reliable, robust, and low cost. Reliability is one of the essential parameters based on which the motor is selected, and the induction motor primarily comes into force. The well-founded induction motor gives good results under various operating states. Dynamic simulation plays a significant part in evaluating the model’s design process to eliminate design errors in typical construction types and when testing the motor drive system. The induction motor is modeled in a synchronously revolving rotor flux-oriented frame, which is used as a reference.
  • 3.3K
  • 16 Jan 2023
Topic Review
Battery Equalizer Circuits
In this entry, several battery equalizer circuits are reviewed and simulated. In addition, a table is presented where the main characteristics of the equalizers are summarized. These characteristics are used to assign a score to each circuit with respect to how many characteristics are similar to the ideal equalizer. Finally, a methodology is presented to compare these equalizers, taking into account the results obtained from the table.
  • 3.3K
  • 25 Nov 2020
Topic Review
Quad Flat Package
A QFP or Quad Flat Package is a surface-mounted integrated circuit package with "gull wing" leads extending from each of the four sides. Socketing such packages is rare and through-hole mounting is not possible. Versions ranging from 32 to 304 pins with a pitch ranging from 0.4 to 1.0 mm are common. Other special variants include low-profile QFP (LQFP) and thin QFP (TQFP). The QFP component package type became common in Europe and United States during the early nineties, even though it has been used in Japan ese consumer electronics since the seventies. It is often mixed with hole mounted, and sometimes socketed, components on the same printed circuit board. A package related to QFP is PLCC which is similar but has pins with larger pitch, 1.27 mm (or 1/20 inch), curved up underneath a thicker body to simplify socketing (soldering is also possible). It is commonly used for NOR flash memories and other programmable components.
  • 3.3K
  • 29 Nov 2022
Topic Review
Pentacene and Its Derivatives Deposition Methods
Pentacene is a well-known conjugated organic molecule with high mobility and a sensitive photo response. It is widely used in electronic devices, such as in organic thin-film transistors (OTFTs), organic light-emitting diodes (OLEDs), photodetectors, and smart sensors. With the development of flexible and wearable electronics, the deposition of good-quality pentacene films in large-scale organic electronics at the industrial level has drawn more research attention. Several methods are used to deposit pentacene thin films. The thermal evaporation technique is the most frequently used method for depositing thin films, as it has low contamination rates and a well-controlled deposition rate. Solution-processable methods such as spin coating, dip coating, and inkjet printing have also been widely studied because they enable large-scale deposition and low-cost fabrication of devices. 
  • 3.2K
  • 18 Apr 2022
Topic Review
Resonant cavity antennas technology
       Resonant cavity antennas (RCAs) are suitable candidates to achieve high directivity with a low-cost and easy fabrication process. The stable functionality of the RCAs over different frequency bands, as well as, their pattern reconfigurability make them an attractive antenna structure for the next-generation wireless communication systems, i.e., fifth-generation (5G). The variety of designs and analytical techniques regarding the main radiator and partially reflective surface (PRS) configurations allow dramatic progress and advances in the area of RCAs. Adding different functionalities in a single structure by using additional layers is one appealing feature of the RCA structures, which has opened the various fields of studies toward 5G applications. This paper reviews the recent advances on the RCAs along with the analytical methods, and various capabilities that make them suitable to be used in 5G communication systems. 
  • 3.2K
  • 27 Aug 2020
Topic Review
Plug-in Electric Vehicles in France
The adoption of plug-in electric vehicles in the France is actively supported by the French government through a bonus-malus system through which provides subsidies towards the purchase of all-electric vehicles and plug-in hybrids with low CO2 emissions. The government also provides non-monetary incentives; subsidies for the deployment of charging infrastructure; and long term regulations with specific targets. Additionally, France passed a law in December 2019 to phase out sales of cars that burn fossil fuels by 2040. (As of September 2021), there were 687,876 light-duty plug-in electric vehicles in use in France, consisting of 453,143 all-electric passenger cars and commercial vans, and 234,733 plug-in hybrids. Of these, over 50,000 were fully electric light commercial vehicles. The split among type of powertrain is influenced by the rules of the government subsidies, which favors pure electric vehicles over plug-in hybrids. The plug-in passenger car segment attained a market share of 0.5% in 2013, rose to 1.2% in 2015, 2.2% in 2018, and climbed to 2.8% in 2019. Despite the global strong decline in car sales brought by the COVID-19 pandemic, plug-in electric car sales in France during the first six months of 2020 achieved a record sales volume of 65,267 units, and a market share of 9.1%. (As of December 2019), France listed as the world's second largest market after China for light-duty electric commercial vehicles, with a stock of 49,340 utility vans in circulation. The market share of all-electric utility vans attained 1.2% of new vans registered in 2014, rose to 1.8% in 2018, but declined to 1.7% in 2019. The Renault Zoe has led all-electric car sales in France since 2013, and is the country's all-time best selling plug-in electric car with more than 100,000 units registered through June 2020. The electric utility van segment has been led by the Renault Kangoo Z.E. with over 21,000 units sold through February 2019.
  • 3.2K
  • 28 Nov 2022
Topic Review
Radio-Absorbing Materials and Technologies for Their Production
Radio waves cover a fairly wide spectrum of the frequency range (the range of waves used is from ultra-long to millimeter; the range is from centimeters and meters to thousands of kilometers) and are harmonic signals modulated in amplitude and frequency. The main source of powerful electromagnetic radiation is an antenna that radiates a flow of electromagnetic energy in a directionally or non-directionally into the surrounding space.
  • 3.2K
  • 17 Aug 2022
Topic Review
Microgrid Operation Mode and Architectures
Energy security and the resilience of electricity networks have gained critical momentum as subjects of research. The challenges of meeting the increasing electrical energy demands and the decarbonisation efforts necessary to mitigate the effects of climate change have highlighted the importance of microgrids for the effective integration of renewable energy sources. Microgrids (MGs) can operate in grid-connected and islanded operation. MG architectures are categorised as alternating current microgrid (ACMG), direct current microgrid (DCMG) and hybrid microgrid (HMG).
  • 3.2K
  • 31 Jan 2023
Topic Review
Gas-Sensing Characteristics of Metal Oxide Semiconductor Sensors
The sensing characteristics of metal oxide semiconductors (MOSs) depend on the carrier concentration, which is relevant to the working temperature. The characteristic parameters commonly used to measure gas-sensing performance include optimal working temperature, sensitivity, selectivity, stability, repeatability, response and recovery time, and the lowest detection limits.
  • 3.2K
  • 29 Jun 2022
Topic Review
SPAD Arrays
The SPAD is the basic unit cell of all SiPM/PDC technologies. It consists of a photodiode biased above breakdown in a metastable state awaiting to be triggered by a photoelectron or a thermally excited carrier to switch to high current.
  • 3.2K
  • 18 Mar 2021
Topic Review
Deep-Learning-Based Channel Estimation Methods
With the rapid development of wireless communication technology, intelligent communication has become one of the mainstream research directions after the fifth generation (5G). In particular, deep learning has emerged as a significant artificial intelligence technology widely applied in the physical layer of wireless communication for achieving intelligent receiving processing. Channel estimation, a crucial component of physical layer communication, is essential for further information recovery. 
  • 3.2K
  • 25 Dec 2023
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