Physical Parameter Optimization from Experimental Results in a Packed Bed Three-Phase Reactor Using the tracer Technique

The <i>dq</i>-frame admittance of closed-loop controlled three-phase converters is a linearized model that is dependent on the operating points of the system. Yet, it is impractical to measure the converter admittance at all operating points. This paper, thus, proposes an approach to estimating the <i>dq</i>-frame admittance of three-phase converters at a wide range of operating points. The method applies multidimensional interpolation to a given set of admittance data, which is measured from the pre-defined operating points. The accuracy of interpolation is then evaluated by using the posterior error estimation method. The number of pre-defined operating points is next adjusted to find a good compromise between the accuracy and efficiency of the approach. Simulations and experimental results verify the effectiveness of the approach.<div><br></div>

Download Full-text

Control and Design Constraints of Compensators for Mitigation of Harmonics in Photovoltaic Inverter

International Journal of Recent Technology and Engineering - 2 ◽

10.35940/ijrte.b1569.0982s1119 ◽

2019 ◽

Vol 8 (2S11) ◽

pp. 3386-3390

Keyword(s):

Transient Response ◽

Lower Order ◽

Frequency Deviation ◽

International Standards ◽

Experimental Results ◽

Electric Grid ◽

Design Constraints ◽

Lcl Filter ◽

Current Harmonics ◽

Three Phase

Compensators are devices which diminish the current harmonics of the lower order which are injected to the electric grid to meet the international standards. Resonant compensators are used to reduce the particular harmonics in grid-connected photovoltaic inverters. This paper presents how the harmonics are mitigated within the standards by using lead, lag, lead-lag compensators. The frequency deviation and transient response are considered the important factors during the design of the compensators. MATLAB design of grid connected photovoltaic inverter is presented with simulation result. A hardware of three phase photovoltaic load connected inverter with LCL filter was implemented. The simulation and experimental results of Grid connected Photovoltaic inverter with and without compensation are discussed. The harmonic profiles of these compensators are also presented.

Download Full-text

RESEARCH AND DESIGN OF GRID-CONNECTED INVERTER IN PHOTOVOLTAIC SYSTEM WITH SVPWM TECHNIQUE

International Journal of Engineering Technologies and Management Research ◽

10.29121/ijetmr.v6.i11.2019.460 ◽

2020 ◽

Vol 6 (11) ◽

pp. 18-31

Author(s):

Nguyen Duc Minh ◽

Bui Van Huy ◽

Ngo Thi Quan ◽

Nguyen Quang Ninh ◽

Trinh Trong Chuong

Keyword(s):

Pulse Width ◽

Pulse Width Modulation ◽

Experimental Results ◽

Photovoltaic System ◽

Photovoltaic Systems ◽

Space Vector ◽

Electrical Grid ◽

Three Phase ◽

Grid Connected Inverter ◽

Research And Design

This paper presents the design and simulation of three phase grid-connected inverter for photovoltaic systems with power ratings up to 5 kW. In this research, the application of Space Vector Pulse Width Modulation (SVPWM) technique for inverter is explored. With the use of SVPWM inverter, synchronization between the inverter and electrical grid follows the Phaselocked Loop (PLL) algorithm. The proposed design is simulated and validated by experimental results.

Download Full-text

Fault diagnosis of bearing based on relevance vector machine classifier with improved binary bat algorithm for feature selection and parameter optimization

Advances in Mechanical Engineering ◽

10.1177/1687814016685294 ◽

2017 ◽

Vol 9 (1) ◽

pp. 168781401668529 ◽

Cited By ~ 4

Author(s):

Sheng-wei Fei

Keyword(s):

Feature Selection ◽

Fault Diagnosis ◽

Parameter Optimization ◽

Bat Algorithm ◽

Relevance Vector Machine ◽

Experimental Results ◽

Machine Method ◽

Training Samples ◽

Kernel Parameter

In this article, fault diagnosis of bearing based on relevance vector machine classifier with improved binary bat algorithm is proposed, and the improved binary bat algorithm is used to select the appropriate features and kernel parameter of relevance vector machine. In the improved binary bat algorithm, the new velocities updating method of the bats is presented in order to ensure the decreasing of the probabilities of changing their position vectors’ elements when the position vectors’ elements of the bats are equal to the current best location’s element, and the increasing of the probabilities of changing their position vectors’ elements when the position vectors’ elements of the bats are unequal to the current best location’s element, which are helpful to strengthen the optimization ability of binary bat algorithm. The traditional relevance vector machine trained by the training samples with the unreduced features can be used to compare with the proposed improved binary bat algorithm–relevance vector machine method. The experimental results indicate that improved binary bat algorithm–relevance vector machine has a stronger fault diagnosis ability of bearing than the traditional relevance vector machine trained by the training samples with the unreduced features, and fault diagnosis of bearing based on improved binary bat algorithm–relevance vector machine is feasible.

Download Full-text

Model predictive torque control of a six-phase PM synchronous hub motor with auxiliary voltage vectors

International Journal of Applied Electromagnetics and Mechanics ◽

10.3233/jae-201550 ◽

2020 ◽

pp. 1-17

Author(s):

Hao Xu ◽

Long Chen ◽

Xiaodong Sun

Keyword(s):

Permanent Magnet ◽

Electric Vehicles ◽

Control Method ◽

Research Direction ◽

Synchronous Motor ◽

Torque Control ◽

Experimental Results ◽

Vector Model ◽

Dynamic State ◽

Three Phase

Permanent magnet synchronous hub motors (PMSHMs) have been gradually introduced into the applications of electric vehicles. In order to output more torque, many researchers turned their research direction to six-phase motors. Because it is composed of two sets of three-phase windings, there will be interference between the windings, affecting the performance of the motor. In order to improve the steady and dynamic-state performance of permanent magnet six phase synchronous motor, a predictive torque control method based on multi vector model is proposed in this paper. Finally, experimental results show the effectiveness of this method.

Download Full-text

An Analytical Model for the Effective Dielectric Constant of a 0-3-0 Composite

Volume 12: Processing and Engineering Applications of Novel Materials ◽

10.1115/imece2010-39651 ◽

2010 ◽

Author(s):

K. A. Cook-Chennault ◽

S. Banerjee

Keyword(s):

Dielectric Constant ◽

Aspect Ratio ◽

Analytical Model ◽

Experimental Results ◽

Effective Dielectric Constant ◽

The Third ◽

Third Phase ◽

Three Phase ◽

Phase 0 ◽

Experimental Values

An analytical expression for prediction of the effective dielectric constant of a three phase 0-3-0 ferroelectric composite is presented. The analytical results are verified with the experimental results from Nan et al [1]. We extend the analytical model, so that the influence of the shape of the third phase inclusion, on the effective dielectric constant of the composite, can be investigated. The results indicate that the dielectric constant increases ∼7 times, when the aspect ratio of the conductive inclusion is increased from 1 (sphere) to 10 (spheroid). The analytical predictions compare favorably with the experimental values.

Download Full-text

Transient Analysis of a Multi-phase Induction Machine Operating as Generator

Indonesian Journal of Electrical Engineering and Computer Science ◽

10.11591/ijeecs.v2.i1.pp79-87 ◽

2016 ◽

Vol 2 (1) ◽

pp. 79

Author(s):

Alok Kumar Mohanty ◽

K B Yadav

Keyword(s):

Power Generation ◽

Performance Analysis ◽

Experimental Analysis ◽

Transient Analysis ◽

Induction Machine ◽

Experimental Results ◽

Three Phase ◽

Different Types ◽

Generating Mode ◽

Multi Phase

<em>Multi-phase machines are considered serious contenders as compared to the three phase machines for variable applications in generating mode. </em><em>This paper presents the transient performance analysis of a multi-phase induction machine operating in six-phase mode for power generation. In this paper the simulation and experimental analysis of a six-phase machine in generating mode have been made. The simulations are made and the machine functionality was investigated during no-load and when subjected to different types of loads. Experimental results are provided to confirm the ability of these models to represent during no load as well as during load period and the result were found to be satisfactory for power generation</em>.

Download Full-text