New passive filter design for neutral current cancellation in balanced 3-phase 4-wire non-linear distribution systems

2003 ◽  
Vol 13 (2) ◽  
pp. 79-89 ◽  
Author(s):  
E. F. El-Saadany ◽  
M. M. A. Salama ◽  
A. Y. Chikhani
Keyword(s):  
Distribution Systems ◽  
Filter Design ◽  
Neutral Current ◽  
Linear Distribution ◽  
Passive Filter ◽  
Non Linear

LADDER-a microcomputer tool for passive filter design and simulation

1996 ◽  
Vol 39 (4) ◽  
pp. 478-487 ◽  
Author(s):  
R.D. Koller ◽  
B. Wilamowski
Keyword(s):  
Filter Design ◽  
Passive Filter

scholarly journals Internal model controller based PID with fractional filter design for a nonlinear process

2020 ◽  
Vol 10 (1) ◽  
pp. 243
Author(s):  
Hemavathy P.R. ◽  
Mohamed Shuaib Y ◽  
S.K. Lakshmanaprabu
Keyword(s):  
Internal Model ◽  
Process Model ◽  
Filter Design ◽  
Linear Process ◽  
Piecewise Linearization ◽  
Time Model ◽  
First Order ◽  
Non Linear ◽  
Internal Model Controller ◽  
Fractional Filter

In this paper, an Internal model Controller (IMC) based PID with fractional filter for a first order plus time delay process is proposed. The structure of the controller has two parts, one is integer PID controller part cascaded with fractional filter. The proposed controller has two tuning factors λ, filter time constant and a, fractional order of the filter. In this work, the two factors are decided in order to obtain low Integral Time Absolute Error (ITAE). The effectiveness of the proposed controller is studied by considering a non linear (hopper tank) process. The experimental set up is fabricated in the laboratory and then data driven model is developed from the experimental data. The non linear process model is linearised using piecewise linearization and two linear regions are obtained. At each operating point, linear first order plus dead time model is obtained and the controller is designed for the same. To show the practical applicability, the proposed controller is implemented for the proposed experimental laboratory prototype.

Stress Distribution on the Cracked Sandwich Plate with Non Linear Thermal and Moisture Concentration

2021 ◽  
Vol 32 ◽  
pp. 45-62
Author(s):  
Mohamed Khodjet Kesba ◽  
Noureddine El Meiche ◽  
A. Benkhedda
Keyword(s):  
Stress Distribution ◽  
Concentration Distribution ◽  
Sandwich Plate ◽  
Crack Density ◽  
Transverse Cracks ◽  
Linear Distribution ◽  
Moisture Concentration ◽  
Linear Temperature ◽  
Stiffness Reduction ◽  
Non Linear

The influence of linear and non-linear temperature and moisture concentration distribution on the stress distribution was studied for metal/ceramic sandwich plate with transverse cracks. An interlaminar adhesive layer between two different layers is taken into account which transferring the normal stress and the interlaminar shear stress. The validation of the used model was done with the comparison of the stiffness reduction as a function of crack density and the experimental data. A comparison showed that a satisfactory qualitative and quantitative agreement was obtained. The temperature and moisture concentration variation are studied using the linear and non-linear distribution around the cracks to predict the stress distributions along the axis x. Finally, it observed through this study that the variations of the thermal and moisture concentration distribution largely impact the stress distribution for a sandwich plate with transverse cracks in the central layer and also with different mechanical properties of each layers.

Modified Distribution Transformer for Enhancing Power Quality in Distribution Systems

2016 ◽  
Vol 7 (4) ◽  
pp. 1386
Author(s):  
Preetha P.K. ◽  
P.S. Chandramohanan Nair
Keyword(s):  
Power Distribution ◽  
Distribution Systems ◽  
Experimental Studies ◽  
Considerable Improvement ◽  
Distribution Transformer ◽  
Maximum Power Point ◽  
Non Linear ◽  
Power Point ◽  
Day By Day ◽  
Harmonic Power

<p>The percentage of non-linear loads in the power distribution sector is increasing day by day. Harmonics injected by these non-linear loads circulate in the delta windings of the conventional distribution transformer thereby increasing the temperature and losses. This reduces the efficiency and life of the transformers. In a modified distribution transformer configuration proposed recently, called star-star-delta_utilized configuration (YYD_utilized), the harmonics circulating in the delta winding was utilized and the drainage power thus recovered was used to power auxiliary loads. This paper presents the experimental studies conducted on YYD_utilized distribution transformer. When compared to conventional star-star, delta-star and star-star-delta transformers, the new configuration of YYD_utilized transformer has shown considerable improvement in transformer efficiency.  The results obtained show that when the power from the circulating harmonics is recovered and utilized, it not only improves transformer efficiency but also improves the power factor and reduces the harmonic distortions at the primary side of the transformer. The results obtained also suggest the existence of maximum power point or an optimum loading for the recovered harmonic power.</p>

A novel non-linear recursive filter design for extracting high rate pulse features in nuclear medicine imaging and spectroscopy

2013 ◽  
Vol 35 (6) ◽  
pp. 754-764 ◽  
Author(s):  
Salar Sajedi ◽  
Alireza Kamal Asl ◽  
Mohammad R. Ay ◽  
Mohammad H. Farahani ◽  
Arman Rahmim
Keyword(s):  
Nuclear Medicine ◽  
Filter Design ◽  
High Rate ◽  
Nuclear Medicine Imaging ◽  
Recursive Filter ◽  
Non Linear ◽  
Imaging And Spectroscopy
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