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The objective of this article is to study the kinetics of charged particles in a glow discharge low pressure in DC mode, sustained by electrons and ions uniform production source. We deduced for the stationary state, the electrics characteristics distributions of the charged particles in a two-dimensional 2D plan-plan configuration. The numerical model presented in this work is based on the first...
The power filter plays an important role in the power transfer, but the capacity of typical filter to discharge the surge is very low, especially to the lightning surge. In this paper, an improved filter to the power is presented. With 2-stage SPD and the filtering inductance as decoupling component, the filter has dual function of high capacity for surge and filtering for disturbing. By the simulation...
Electrostatic discharge is a well-known electromagnetic interference. Its transient field can affect operation of electronic equipment. In the paper, the transient electromagnetic field of indirect electrostatic discharge through vertical coupling plane is numerically simulated by using the FDTD method. An expression of pulse function is used as the electrostatic discharge current. Configuration with...
Sintered particle trajectories in the electrostatic precipitator(EP) have been studied numerically in this study. There are live discharge electrodes in the geometry configuration. The discharge electrodes are placed inside the collecting electrodes channel which is 300mm in height, the wire-to-wire distance of each discharge electrode is 500mm. The particle trajectories in the electrostatic precipitator...
Based on the dissolved gases analysis and grey relational theory, a fault diagnosis method for transformers is proposed. Fault diagnosis in transformers has several parameters such as the severity of fault and the kind of fault, a lot of typical fault samples are divided into several sets according to the fault type. The practical data are analyzed using grey relational analysis. The experiment showed...
The performance of an indirect Non-thermal plasma (INTP) system used to decompose harmful exhaust emission from diesel engine was experimentally studied, using a self-designed dielectric barrier discharge (DBD) NTP reactor with coaxial cylinder structure. The impact of peak to peak value (Vp-p) and frequency of voltage-supplied, flow rate of air and the temperature of discharge zone on the concentration...
Maximum continuous discharge current is one key parameter for Lithium ion battery pack design in mobile computing system. This paper proposes a RMS(Root Mean Square) equivalent current method to evaluate this parameter and address relationship between maximum continuous discharge power and this parameter. The experiment has been conducted to verify effectiveness of this method to assist battery pack...
The smart grid's cell unit -smart microgrid combins with the advantages of distributed generation systems (DGS) and big power grid supply systems, The proposed of smart grid has brought new opportunities and challenges for the development of electric vehicle charging station systems. This paper introduces the domestic and foreign research status about electric vehicle charging station, puts forward...
The height of electrical equipment in the converter station increases with the increase of voltage level of power transmission system, and the limitation of the existing calculation methods of protection range of lightning rod is gradually being revealed. Based on the theoretical analysis of the electrogeometric model (EGM), a new design scheme of lightning rod for ultra high voltage direct current...
It is opinion that climate change on the planet is largely dependent on the increase of greenhouse gases in the atmosphere and that this effect is related largely to human activities that make CO2. Reducing the discharge of CO2 has therefore become a common objective of the international community, including China. There are various actions that are proposed for the reduction of the gas: increased...
In order to study the removal effect of non-thermal plasma (NTP) after-treatment system on diesel engine harmful emissions, a dielectric barrier discharge (DBD) plasma reactor is designed, and the NOx removal effect is studied. The results show that reduce the initial concentration of NO, increase the residual time and decrease the gas flow rate would get a high NO removal efficiency. NO reduction...
Electric vehicles play an important role in the energy saving and emission reduction program. However, the influence on the power quality of distribution network caused by the electric vehicles becomes more and more serious, including the voltage drop and other aspects. Therefore in the paper, a flexible and ordered charging control system for the electric vehicles is developed. Firstly the electricity...
Three working fluids R125, R143a and R32 were analyzed thermodynamically for the transcritical heat pump with low temperature geothermal source as its heat source. The system parameters investigated include coefficient of performance (COP), volumetric heat capacity (Qv), compressor discharge temperature and the pressure ratio. The results show that Qv, pressure ratio and compressor discharge temperature...
In Thailand, fossil and coal fuel energies are normally used for electrical generation and the tendency of used fossil and coal fuel energy is continuously increasing. There are about 1300-1500 mm rainfall and 1467 reservoirs in Mun river basin, which covers 71,071 square kilometers in lower northeastern of Thailand. Then, micro-hydropower is of interest as a renewable energy form of mankind for providing...
Charged supercapacitors are in a state of high free energy relative to that of the discharged state, so there is a internal drive-force for their self-discharge. The self-discharge behavior of supercapacitors is an important factor when considering the capability of charge hold and evaluation of performance. Several mechanisms of self-discharge are distinguished and measurements of the self-discharge...
Studies on lightning discharge processes are foundation for well-know the lightning physics and effects, and it is very important to make optical, electric and magnetic observation data synchronized with each other. Combining with the China Grid Lightning Detection Network (CGLDN), this paper utilizes the latest high-speed CCD video system, Fast/Slow electric-field antenna, magnetic-field antenna,...
A new method to estimate the battery state of charge (SOC) in electric vehicles (EV) based on support vector machine is presented. The key of the proposed method is to establish the relationship of the SOC to the battery current, voltage and temperature by using weighted least squares support vector machine (WLS-SVM). With the goal of achieving the optimal robust estimation of the SOC, the extended...
Trichel pulse characteristics of needle-to-plate electrode were studied. The experimental results indicate that time-averaged corona current increased with the voltage, but the peak pulse current decreased with the voltage; when the averaged electric field strength reached about 7.6kV/cm, Trichel pulse was not steady and easily converted to pulseless corona. The curvature radius had influence on the...
SOC (State Of Charge) was one of the most important parameters for EVs (Electric Vehicles). It was the basis for EVs to prevent over-charging and over-discharging. Many researchers had been done to improve SOC estimation accuracy. In this paper, definition of SOC was discussed and the traditional SOC estimating algorithms and some improved SOC estimation algorithms were reviewed. The principles of...
Micro-grid technology can integrate the advantages of distributed generation power system, to provide users with quality and reliable electricity. This paper designs the photovoltaic system which is short for PV based on the energy storage structure which not only analyses the energy flow direction of the charging and discharging circuit, but also designs the control strategy of charging and discharging...
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