bluuebunny/crossref_metadata_2025_split huggingface dataset:
An Open-Circuit Fault Detection Method with Wavelet Transform In IGBT-Based DC/AC Inverter Used in Electric Vehicles
Authors: Moosavi Saeid , Akbari Hesam , Valipour Saeed 
Published: January 2019

<span>Today power electronics play an important role in the electric industry. Power electronic converters are an inseparable component in power systems. One of these converters is DC/AC inverter that is widely used in power systems, industrial applications, electric motor drive and electric vehicles. Due to the tense situation with the complexity that exists in these applications, inverters are exposed to failure. The fault occurring in inverter can cause disturbance and damaging harmonics, cut some industrial processes to in the power system or in the case of electric vehicles, causing irreparable damage. For this reason, detecting faults in the inverter is very important. In this paper, open circuit fault of IGBT in an electric vehicle has been examined. We use three-phase current and wavelet transform to identify the state of the system and we can extract current waveform characteristics. We use neural network algorithm for fault detection and classification. An electric vehicle in 5 different speeds and 5 different torque and a total of 220 failure modes have been studied and tested. The results show the method has been succeeded to detection all forms of defined faults</span>
Analysis of the Effect of an Installation of a Single Tuned Passive Filter on Harmonics and Distribution Transformers
Authors: Aini Zulfatri , Ahnur Zainal , Setiawan David , Fudholi Ahmad 
Published: January 2019

<span>Non-linear loads on power systems cause harmonics and losses in distribution transformers. Results of the measurements on the two distribution transformers showed several phase transformer test-driven development (TDD) values above the standard SPLN D5.004-1: 2012. The values were 5.58% in the phase transformer, T 1 and 5.48% and 6.10% in S and T phases of the second transformer, respectively. In the calculations, the transformer losses due to harmonic currents were 1.64 kW in the phase transformer T 1, and 1.64 kW and 1.82 kW in the S and T phases of transformer 2, respectively. Designing a single-tuned passive filter based on the characteristics of the current, voltage, power, and power factor in the phase transformer with a value above the TDD standard can reduce the harmonics and losses. A filter with different specifications in each filtered phase transformer was obtained. The filter reduced the TDD value on the phase transformer T 1 to 3.55% and to 3.88% and 3.43% on the on phase T and S phases of transformer 2. Moreover, it reduced the losses to 0.73 kW on phase transformer T 1, and 1.02 kW and 0.92 kW on the S and T phases of transformer 2. </span>
Maximum Power Point Tracker Using Fuzzy Logic Controller with Reduced Rules
Authors: Haddouche Adel , Kara Mohammed , Farah Lotfi 
Published: January 2019

<p><span lang="EN-US">This paper presents a fuzzy logic controller for maximum power point tracking (MPPT) in photovoltaic system with reduced number of rules instead of conventional 25 rules to make the system lighter which will improve the tracking speed and reduce the static error, engendering a global performance improvements. in this work the proposed system use the power variation and current variation as inputs to simplify the calculation, the introduced controller is connected to a conventional grid and simulated with MATLAB/SIMULINK. The simulation results shows a promising indication to adopt the introduced controller as an a good alternative to traditional MPPT system for further practical applications</span></p>
Using the Five-Level NPC Inverter to Improve the FOC Control of the Asynchronous Machine
Authors: Es-Saadi Mouna , Khafallah Mohamed , Chaikhy Hamid 
Published: January 2019

<span lang="EN-US">Many researches have been dedicated to develop the induction motor drive control strategy used on the railway traction applications. In this paper we propose to investigate and to improve the electric locomotives by using a Field Oriented Control (FOC) strategy of induction motor drive. This induction motor can be powered by a five-stage neutral point inverter controlled by sinusoidal pulse width modulation (SPWM) due to good quality for output voltage and The use of fast switches. Both conventional and improved locomotives are simulated in Matlab/Simulink and compared in open loop conditions and closed loop conditions using IP controller, in term of torque response, current harmonic distortions and rotor speed response.</span>
New Version of Adaptive Speed Observer based on Neural Network for SPIM
Authors: Thuy Pham Ngoc , Phu Nguyen Diep , Huu Nguyen Khuong , Van Nguyen Nho 
Published: January 2019

This paper presents a novel Stator Current based Model Reference Adaptive System (SC_MRAS) speed observer for high-performance Six Phases Induction Motor (SPIM) drives using linear neural network. The article aim is intended to improve performance of an SC_MRAS observer, which were presented in the literature. In this proposed scheme, the measured stator current components are used as the reference model of the MRAS observer to avoid the use of a pure integrator and reduce the influence of motor parameter variation. The adaptive model uses a two-layer Neural Network (NN) to estimate the stator current, which has been trained online by means of a Least Squares (LS) algorithm instead of uses a nonlinear Back Propagation Network (BPN) algorithm to reduce the complexity and computational burden, it also help to improve some disadvantages cause by the inherent nonlinearity of the BPN algorithm as local minima, two heuristically chosen parameters, initialization, and convergence problems, paralysis of the neural network. The adaptive model of the proposed scheme is employed in prediction mode, not in simulation mode as is usually the case in the literature, this made the proposed observer operate better accuracy and stability. In the proposed observer, stator and rotor resistance values are estimated online, these values thereafter were updated for the current observer and rotor flux identifier to enhance the accuracy, robustness and insensitivity to parameters variation for the proposed observer. The proposed LS SC_MRAS observer has been verified thought the simulation and compared with the BPN MRAS observer. The simulation results have proven that the speed is estimated a consequent quicker convergence, do not need the estimated speed filter, lower estimation errors both in transient and steady state operation, better behavior in low and zero speed operation.
Design and Analysis of Adaptive Sliding Mode with Exponential Reaching Law Control for Double-Fed Induction Generator Based Wind Turbine
Authors: Belgacem Kheira , Mezouar Abelkader , Essounbouli Najib 
Published: January 2019

<p>The main objective of this paper is to continue the development of activities of basic and applied research related to wind energy and to develop methods of optimal control to improve the performance and production of electrical energy from wind. A new control technique of Double fed induction generator for wind turbine is undertaken through a robust approach tagged nonlinear sliding mode control (SMC) with exponential reaching law control (ERL). The SMC with ERL proves to be capable of reducing the system chattering phenomenon as well as accelerating the approaching process. A nonlinear case numerical simulation test is employed to verify the superior performance of the ERL method over traditional power rate reaching strategy. Results obtained in Matlab/Simulink environment show that the SMC with ERL is more robust, prove excellent performance for the control unit by improving power quality and stability of wind turbine.</p>
The Optimization of Hybrid Air Ventilation System Combined with Silica Gel and Thermoelectric Using Monitoring Control
Authors: Chaisan Jirod , Maneewan Somchai , Punlek Chantana 
Published: January 2019

In this paper, the experimental is evaluated temperature, humidity and air pollution from CO<sub>2</sub> by monitoring control of hybrid air ventilation for producing fresh air. The experimental divided into 2 conditions: hybrid air ventilation on-off, recovery silica gel unit. That research consider of a voltage of thermoelectric devices relative with air cooling under thermal comfort zone Thailand climate conditions. In the experimental was designed by the DOAS system (dedicate outdoor air system) concept. Whereas, the hybrid air ventilation was improved by old air ventilation which the hybrid air ventilation combined with silica gel unit and thermoelectric device. Monitoring control is written by Arduino program that is open source for control performance of processes such as sensors, electric current and fan unit. That working is specified temperature and humidity Thailand thermal comfort range. In the part of CO<sub>2</sub> was released rate approximately 900 ppm corresponded with indoor air quality standard (IAQs). The results of experimental suggested that in case of hybrid air ventilation system explained thermal, humidity and CO<sub>2</sub> distribution due to the system was adapted significantly in the comfort zone temperature and humidity about 28 and 58% respectively. However, the CO<sub>2</sub> released into the hybrid air ventilation although control during 900 – 1,000 ppm. High CO<sub>2</sub> concentration in comfort zone used the hybrid air ventilation that decreased CO<sub>2</sub> inlet under ASHRAE 62.2. Therefore, the experimental is an evaluation of monitoring control hybrid air ventilation for management comfort zone. Finally this research concept of the optimization of the hybrid air ventilation combination with thermoelectric devices and silica gel unit.
Cost Effective Solution for a Shunt Hybrid Filter Using Enhanced Current Controller
Authors: Kameswari Y. Lalitha , Chandra Sekhar O. 
Published: January 2019

<p>The increasing demand of energy and development of distributed generation systems have led to great progress in medium voltage high-power inverters. On the other side, due to more intransigent regulations in the area of power quality and appearance of new grid codes, which limit the harmonics’ amounts in ac grids, special attention has to be made to restrict the harmonics. The recently proposed selective harmonic mitigation pulse width modulation method reduces the values of specific harmonics to meet the grid codes, instead of making them zero. In this way, there are much more solutions for mitigating the same harmonics which in the Selective Harmonic Eliminated Pulse-Width Modulation (SHEPWM), are completely eliminated. The SHMPWM was first introduced in, where a waveform having 750 Hz switching frequency was employed to mitigate harmonics up to 49th to satisfy the grid codes EN 50160 and CIGRE WG 36-05 without using any filtering system. In this contribution a solution to the parallel resonance problem that can be present in practical applications of shunt Active Power Filter (APF) compensation is proposed. The proposed solution involves turning the shunt APF scheme of compensation into a Shunt Hybrid Filter (SHF) configuration. A Linear Quadratic Regulator (LQR)-based switching controller was specifically designed for this hybrid scheme of compensation, maintaining stringent performance requirements on the tracking of filtering currents and the draining of the harmonic ripple currents.</p>
Efficiency Performances of Two MPPT Algorithms for PV System With Different Solar Panels Irradiancess
Authors: Abdulrazzaq Ali Abdulwahhab , Hussein Ali Adnan 
Published: January 2019

<span lang="EN-US">A main source of current renewable energy is solar energy. This source of renewable energy can be converted to electrical energy using solar photovoltaic (PV) cells. The Maximum Power Point Tracking (MPPT) earns for maximum energy extractor from PV panels by different irradiance levels. In this paper, overall efficiency of most two popular MPPT techniques utilized in PV applications are analyzed, these algorithms are Perturb and Observe (P&amp;O) and Incremental Conductance (INC). An analysis of the results for the algorithms based on MATLAB simulation for various changes in solar irradiance is performed. Results showed that the efficiency of P&amp;O algorithm was higher than that of the INC, but to obtain the same performance for both, more concentrated calculations should be used for INC. In measuring the output power, current and voltage responses, the use of a solar array having constant and variable irradiations was employed as input for the algorithms. The output waveforms which were derived from a simulation run for the purpose of obtaining the algorithms response to changes in solar array irradiations were compared. In general, the consequences of the P&amp;O algorithm are quiet good and adequate. However, there is a need to improve the algorithm so as to satisfy the requirements of face confident timing in addition to its rapid response so as to make its performance better than that of InCond algorithms.</span>
A Neural Network and Fuzzy Logic based MPPT Algorithm for Photovoltaic Pumping System
Authors: Assahout Salwa , Elaissaoui Hayat , El Ougli Abdelghani , Tidhaf Belkassem , Zrouri Hafida 
Published: January 2019

<p><span lang="EN-US">The use of solar energy had gained a great attention last decades, as it is pollution-free. It is used in isolated areas for lighting, pumping, etc. However, the extraction of the maximum power generated by a PVG at any moment of the day is a big deal because the characteristic of a PVG in non-linear which makes the location of the Maximum Power Point (MPP) difficult. Therefore, a Maximum Power Point Tracking technique (MPPT) is required to maximize the output power.<strong> </strong>In this paper, a photovoltaic water pumping system has been studied. This system consists of three main parts: PVG, a DC-DC boost converter and a DC motor coupled with a centrifugal water pump. We have proposed a new MPPT algorithm based on Fuzzy logic and Artificial Neural Network (ANN) to improve the system performances. The ANN is used to predict the optimal voltage of the PVG, under different environmental conditions (temperature and solar irradiance) and the fuzzy controller is used to command the DC-DC boost converter. The proposed method is compared to P&amp;O technic, by simulation under Matlab/Simulink, to verify its effectiveness. </span></p>
Overview of Bifluid-based Photovoltaic Thermal (PVT) Systems
Authors: Shahirah Binti Rukman Nurul , Fudholi Ahmad , H. Zaidi Saleem , Sopian Kamaruzzaman 
Published: January 2019

<p>This review presents various research and development, as well as design and performances of bifluid-based PVT systems. Moreover, the development of PVT system is a very promising area of research. PVT systems using in various applications, such as solar drying, solar cooling, water heating, desalination, and pool heating. With the recognition of the potentials and contributions of PV system, considerable research has been conducted to attain the most advancement which may produce reliable and sustainable PVT system. The cooling system’s design refers to the absorber design which mostly focuses on water and air-based PVT systems. An air-based system has been developed through different absorber configurations, air flow modes and single- or double-pass design. Bifluid-based PVT system is used to remove heat accumulated in a PV panel and reuses the waste heat (hot air and water) in an appropriate way. PV, thermal and PVT efficiencies of bifluid PVT systems were 6.6%-18.6%, 31%–90% and 60%-83%, respectively. </p>
Brushless DC Motor Speed Control Using Single Input Fuzzy PI Controller
Authors: Baharudin N. N. , Ayob S. M. 
Published: January 2019

<span lang="EN-US">Brushless DC (BLDC) motor is more reliable than classic DC motor with higher efficiency. Commonly used conventional linear controller such as PI, PID and PD controller. FLC is considered a replacement to conventional controller due to advantages on non-linear system. Hybrid controller e.g Fuzzy PI controller is developed to cope with drawback of both controller. Simplification of FLC in previous study is the pioneer of the idea of proposed method. Single-Input Fuzzy PI Controller (SIFPIC) is a hybrid controller that combines advantages of linear PI controller and fuzzy controller in one control structure. Since it is a single input based fuzzy controller, it yields simpler design and tuning process. Simulation is done using MATLAB/Simulink and the performance is observed through speed response under several conditions namely constant speed, changing seed and changing load torque. The performance of SIFPIC is compared with conventional PI and fuzzy PI controller. SIFPIC is as expected produced a response similar with the conventional fuzzy PI controller with both fuzzy based controller produce response with better dynamic.</span>
Population status and floral biology of Trichopus zeylanicus ssp. travancoricus Burkill ex K. Narayanan (Dioscoreaceae), an important ethnomedicinal plant of the southern Western Ghats, India
Authors: Sasikala Nambi , Ramasubbu R. 
Published: January 2019

Trichopus zeylanicus ssp. travancoricus is locally known in Tamil Nadu as Arogyapachai, meaning a plant that provides good health and vitality. The unripe fruits of the plant are highly rejuvenating and are used by the Kani Tribe to ameliorate fatigue. This subspecies is also known for its pharmacological and medicinal utility and possesses choleretic, aphrodisiac, hepatoprotective, mast cell stabilizing, adaptogenic, and cardioprotective properties. A study was attempted to understand the population status and floral biology of T. zeylanicus ssp. travancoricus in its natural habitat. The population of this herb was found to be severely fragmented and settled in shaded banks of streams and rivulets in Agasthyamalai Hills. Being a rhizomatous herb, its flowers are concealed by its broad leaves, thus preventing exposure to pollinators. The number of pollinating agents in the flowers was reported as meager. The fruits are capsules with two to six seeds, each having a hard seed coat with a projected endosperm. Therefore, the conventional propagation of the subspecies is not so successful due to its poor seed set and prolonged maturation time. In addition, the fruits are damaged by rodents, livestock, and collection for medicinal usage, which severely affect the population status of the plant. Sustainable use of this wonder herb is important for its conservation in its natural habitat.
Redescription of Leposternon octostegum (Duméril, 1851), with an identification key for Brazilian Leposternon species, remarks on meristic methodology, and a proposal for pholidosis nomenclature (Squamata: Amphisbaenidae)
Authors: Barros-Filho José Duarte de , Freitas Marco Antonio de , Silva Thais Figueiredo Santos , Loguercio Mariana Fiuza de Castro , Valverde Maria Celeste Costa 
Published: January 2019

The amphisbaenian Leposternon octostegum (Duméril, 1851) is redescribed based on newly collected material from the state of Bahia, Brazil. Species validity was confirmed, and comparisons made to other Leposternon species and to the scarce literature available on Leposternon octostegum taxonomy. Aspects of meristic annuli methodology are reviewed, and nomenclatural adjustments for some scales are proposed. To place this information in its taxonomic context, a species identification key for the Brazilian species of the genus Leposternon is provided. The present redescription contributes to a better understanding of Amphisbaenia taxonomy, thus also enabling the design of more adequate conservation and management strategies for the species belonging to this group.
Additional record of the poorly known Argus Paralasa nepalica (Paulus, 1983) (Insecta: Lepidoptera: Nymphalidae) in Nepal
Authors: Suwal Sanej Prasad , Hengaju Krishna Dev , Kusi Naresh 
Published: January 2019

The Nepal Argus Paralasa nepalica is poorly known in Nepal. There are only three records of the species so far, near the Nepal-China border. This photographic record, obtained about 166km north-west from Dolpa and 68.7km north-east from Chya lekh, Darchula, provides the fourth record and also extends the national distribution of the species further north-west towards Humla District. The photograph, presented herein, is probably the first of this species in its natural habitat. Our observation of the species from a wide valley calls for further research to better understand the habitat and ecology of the species.
Marine snakes of Indian coasts: historical resume, systematic checklist, toxinology, status, and identification key
Authors: Ganesh S.R. , Nandhini T. , Samuel V. Deepak , Sreeraj C. R. , Abhilash K. R. , Purvaja R. , Ramesh R. 
Published: January 2019

We compile an up-to-date checklist of 26 species of marine snakes known from the Indian coastlines. We furnish information on the original orthography, authorship, date of publication, current binominal representation, synonymy and chresonymy lists for each recognized taxon. In addition, we provide details of name-bearing types, repository and type locality (both original and subsequent restrictions where applicable) of the prevailing nomen for all recognized species. We summarise the history of research on Indian marine snakes from Linnaeus to the present day, including taxonomic and regional treatises, and highlight the taxonomic flux. We also provide a revised key for this group to facilitate easier identification and support effective conservation.
First report of the catfish Nilgiri Mystus Hemibagrus punctatus (Jerdon, 1849) (Bagridae) from Stanley Reservoir, Tamil Nadu, India
Authors: Jayasimhan Praveenraj , Nallathambi Moulitharan , Goutham-Bharathi M. P. 
Published: January 2019

The Nilgiri Mystus Hemibagrus punctatus (Jerdon, 1849), a Critically Endangered catfish endemic to the Western Ghats of India, is recorded for the first time from Stanley Reservoir in Tamil Nadu, India. An account of the morphometrics of this species, along with notes on its habitat and threats, is provided.
Distribution of the threatened Assamese Macaque Macaca assamensis (Mammalia: Primates: Cercopithecidae) population in Nepal
Authors: Khanal Laxman , Chalise Mukesh Kumar , Jiang Xuelong 
Published: January 2019

Sustainable conservation and management of a species require detailed knowledge of its population status and distribution pattern. The population of the Assamese Macaque Macaca assamensis in Nepal, probably a new subspecies endemic to the country, is yet to be studied for documenting its spatial distribution and size. We did extensive surveys across three major river systems of Nepal (Koshi, Gandaki, and Karnali river systems) by modified line transect method covering almost the entire distribution range of the species within the Nepal territory. We counted a total of 829 individuals in 43 groups that accounted for the average group size of 19.29 (±10.40) individuals. The elevation distribution of the species ranged between 130m and 2650m. Further, we assessed the potential distribution areas of the species by ecological niche modeling employing maximum entropy algorithm. The census and ecological niche modeling congruently revealed the mid-hills of eastern and central Nepal outside the protected areas as the major habitats of this nationally endangered and protected primate. Conservation attempts, therefore, should focus on this area.