Two electrical systems

On one of my returns to California, I attended the "Disabilities Expo 88" at the Los Angeles Convention Center. Among the various marvels oftech­ nology for the wheelchair disabled were stair-climbing wheelchairs, self­ raising and lowering kitchen cabinetry, and even a completely accessible "dude ranch" experience.

214p vimeyers 29-05-2024 3 2   Download

Part 2 book "Electric circuits" includes content: AC power, three phase systems, magnetically coupled circuits, the laplace transform, circuit analysis in the s-Domain, first and second order analog filters, analog filter design, fourier series, fourier transform, two port circuits.

837p dianmotminh01 20-05-2024 5 3   Download

Excessive unbalance of the DC capacitor voltages of the inverter can cause overvoltages on power components and capacitors, causing unintended low-order harmonics on the load side such as second harmonics, 3rd, 4th, 5th,..., causing direct harm to the motor load, reducing the controllability of the reverse voltage and filter compensating current for the active filter circuit, affect to the performance of electric vehicles (EVs).

12p viohoyo 25-04-2024 3 2   Download

Part 1 book "Advanced control of electrical drives and power electronic converters" includes content: Sensor less control of polyphase induction machines, adaptive position tracking with hard constraints—barrier lyapunov functions approach, predictive position control of a two mass system with an induction motor in a wide range of speed changes, selected methods for a robust control of direct drive with a multi mass mechanical load,... and other contents.

156p dianmotminh00 22-04-2024 6 4   Download

Dynamic vibration absorber (DVA) integrated with a piezoelectric stack energy harvesting subjected to base excitation is introduced in this paper. The system of dynamic vibration absorber and piezoelectric stack energy harvesting system (DVA-PSEH) has two functions, the first is to reduce vibrations for the primary system, and the second is to convert a part of the vibrational energy into electricity through the piezoelectric effect.

10p viisac 15-09-2023 8 3   Download

This thesis is dedicated to study how the charging behaviours of plug-in hybrid vehicles affect the local distribution network. This study focuses on two issues: the power loss and charging cost optimization. The multi-objective particle swarm optimization technique is applied to achieve the optimal charging schedule, resulting in acceptable additional power loss ratio and charging cost.

89p runthenight07 01-03-2023 5 2   Download

"Zinc-doped silicene nanoribbons under the influence of constant electric field: A DFT study" investigates the structural and electrical properties of SNRs when doped with zinc. In addition, the system is placed in a constant external electric field. Research shows that the top configuration is the most stable configuration in the external electric field. The research creates a premise for applications in controlling the properties of materials by doping and external electric field effects.

8p lieuyeuyeu18 23-12-2022 14 4   Download

Improvement of the optical absorption coefficient is essential to enhance the light conversion efficiency of thin-film organic solar cells. Here we report the use of an external electric field as a novel switch to improve the optical absorption capacity of two-dimensional defect blue phosphorene (BlueP) systems.

11p vimelindagates 18-07-2022 4 2   Download

Unit commitment is a critical problem in electrical power system optimization that has been well solved over the years. This problem is more complicated for microgrids with high penetration of renewable energy resources. In that context, stochastic optimization has emerged as a remarkable approach that is considered uncertainties in the unit commitment problem besides robust optimization.

4p vistephenhawking 26-04-2022 12 2   Download

Lecture Methods of Electric power systems analysis - Lesson 5: Power flow provide students with knowledge about two bus Newton-Raphson example; two bus solved values; two bus case low voltage solution; practical power flow software note; two bus region of convergence; power flow fractal region of convergence; modeling voltage dependent load;...

38p hanthienngao 15-04-2022 16 1   Download

Lecture Methods of Electric power systems analysis - Lesson 15: Least squares, state estimation provide students with knowledge about revisit the uncommitted transfer capability (UTC) calculation using PTDFs and LODFs; recall trying to determine maximum transfer between two areas (or buses in our example); for base case maximums are quickly determined with PTDFs;...

52p hanthienngao 15-04-2022 10 1   Download

Lecture Methods of Electric power systems analysis - Lesson 19: Voltage stability, economic dispatch, optimal power flow provide students with knowledge about PV curves can be traced by plotting the voltage as the real power is increased; QV curves as reactive power is increased; at least for the upper portion of the curve; two bus example PV and QV curves;...

53p hanthienngao 15-04-2022 19 1   Download

Lecture Methods of Electric power systems analysis - Lesson 21: Optimal power flow, linear programming (LP) provide students with knowledge about OPF problem formulation; two bus with unconstrained line; power flow in a simple network distributes inversely to impedance of path; LP OPF solution method; enforces real/reactive power balance at each bus;...

42p hanthienngao 15-04-2022 13 1   Download

Lecture Methods of Electric power systems analysis - Lesson 24: Geomagnetic disturbances provide students with knowledge about growing concern to consider what the NERC calls calls high-impact, low-frequency events (HILFs); others call them black sky days; keeping the lights on involves designing and operating the electric grid with a goal of simultaneously increasing two related but ultimately different concepts: reliability and resiliency;...

44p hanthienngao 15-04-2022 14 1   Download

Before this earthquake, water resources were monitored in the areas of Bayraklı, Gülbahçe, and Seferihisar. For this purpose, 10 groundwater monitoring wells were drilled in the Bayraklı area, where groundwater level, temperature, and electrical conductivity changes were monitored at 1-h intervals in 5 wells. Besides physical parameters such as groundwater levels, temperatures and electrical conductivities, hydrogeochemical cations, and anions measured in the study area. Change in the groundwater levels was observed before, during, and after the Samos earthquake.

21p tanmocphong 29-01-2022 10 0   Download

This report presents the results on the modeling and optimization the systems of two buoys for wave energy converter. The first is a floater. The second is a semi-submerged body. The energy is converted from the relative motion between the two buoys by the linear generator. For simulation in three dimensions, the system of equations (6 modes of motions) has been obtained. The governing equations are solved by ANSYS AQWA software and Matlab tools.

6p parasite 07-06-2021 17 2   Download

The study of microstructure shows no obvious change of grain size and shape. The magnetic properties of the as-prepared samples show the linear magnetic field dependence of magnetization, suggesting the antiferromagnetic feature of polycrystalline ceramics. The field dependence of magnetization measured after two-years synthesis and after applying an electric field reveal a decrease of maximum magnetization but the hysteresis loops retain the antiferromagnetic behavior.

10p nguyenxuankha_bevandan 14-08-2020 18 2   Download

In this paper, analyses are conducted in order to investigate to which extent and way the absorption capacity of the power system from RES electricity can be improved. As an effective approach of implementing wind power, fostering the accommodation of renewable energy sources, especially on large-scale, a detailed techno-economic analysis of the 164 MW installed grid-connected wind farm, considered as a potential source, Korça district is analyzed.

17p nguyenxuankha_bevandan 13-08-2020 28 2   Download

Water is the most valuable resource in the world and is playing a crucial role in daily activities of living beings on the earth. To meet the ever increasing demand, conservation and management of water resource is very important. Conventional methods of irrigation, like surface and subsurface flooding leads to scarcity of water, which can be reduced by adopting drip or trickle irrigation. Drip irrigation system can be controlled through different automation techniques.

11p angicungduoc6 20-07-2020 17 1   Download

This paper explains how to convert the lost energy through exhaust system in internal combustion engines “ICE” to electric energy by using thermoelectric generators "TEG" with the benefit of the equipment’s which are already existed in most of the internal combustion engines such as water pump, heat exchanger, and exhaust system.

8p lucastanguyen 01-06-2020 17 1   Download