scholarly journals Implementation of a Hybrid ANN-Based Filter for the Reduction of Harmonic Currents

2021 ◽  
Vol 23 (3) ◽  
pp. 265-272
Author(s):  
José Abel Obando ◽  
Victoria Serrano
Keyword(s):  
Control System ◽  
Electrical Network ◽  
Electrical System ◽  
Hybrid Filter ◽  
Electrical Systems ◽  
Harmonic Currents ◽  
Artificial Neural Network Ann ◽  
Voltage Harmonics ◽  
Total Voltage ◽  
Harmonic Distortions

Harmonic distortions caused by non-linear loads (NLLs) affect the behavior of electrical systems, creating harmonics in the fundamental signal. As a result, this deteriorates the power quality. Therefore, this work proposes the implementation of a hybrid filter based on an artificial neural network (ANN) control system, focused on subharmonic, interharmonic and odd harmonic distortions generated by a three-pulse cycloconverter. In addition, a passive double tuned filter was implemented to damp even and odd harmonics. As a result, the simulation performed in MATLAB/SIMULINK showed that the responses produced by the ANN are approximate to the distortions present in the electrical system. Consequently, the levels of total voltage distortions (THDV) and total current distortions (THDI) are reduced. Therefore, the ANN control system improves the quality in the electrical network because the current and voltage harmonics comply with the electrical standards.

Crosstalk in Electrical Connectors

2021 ◽  
Vol 3 (3) ◽  
pp. 54-59
Author(s):  
Van Tai NGUYEN ◽  
◽  
Vladimir Y. Kirillov ◽  
Keyword(s):  
Frequency Band ◽  
Electromagnetic Interference ◽  
Experimental Studies ◽  
Electrical System ◽  
Electrical Wire ◽  
Electrical Systems ◽  
Efficient Reduction ◽  
External Electromagnetic Fields ◽  
Resonance Nature ◽  
Electrical Connectors

Crosstalk electromagnetic interference occurs in on-board electrical wire bundles of aircraft electrical systems under the effect of external electromagnetic fields. Efficient reduction of crosstalk and elimination of their propagation paths in wire bundles can be achieved by shielding the conductors in the bundles and the bundles as a whole without breaks and discontinuities between the shields and housings of electrical connectors. The shielding of conductors in bundles does not eliminate the crosstalk completely, which can propagate through the contacts of electrical connectors. For estimating the influence of electrical connectors on the levels of crosstalk in electrical system circuits, their experimental studies should be carried out. In the course of these experimental studies, the interference voltage induced at the receptor contacts when voltage is applied to the source contacts in the specified frequency band is measured. The results from experimental studies of crosstalk for various types of electrical connectors in a specified frequency band make it possible to evaluate the resonance nature and levels of crosstalk interference levels depending on the relative position of the contacts and frequency.

scholarly journals An Optimized HT-Based Method for the Analysis of Inter-Area Oscillations on Electrical Systems

Energies ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 2935 ◽  
Author(s):  
Francesco Bonavolontà ◽  
Luigi Pio Di Noia ◽  
Davide Lauria ◽  
Annalisa Liccardo ◽  
Salvatore Tessitore
Keyword(s):  
Phasor Measurement Unit ◽  
Measurement Unit ◽  
Frequency Interval ◽  
Electrical System ◽  
Characteristic Parameters ◽  
Electrical Systems ◽  
Electromechanical Oscillations ◽  
Simulated Experiment ◽  
Novel Method ◽  
The Individual

The paper deals with a novel method to measure inter-area oscillations, i.e., electromechanical oscillations involving groups of generators geographically distant from one another and ranging within the frequency interval from 0.1 Hz up to 1 Hz. The estimation of the parameters characterizing inter-area oscillations is a crucial objective in order to take the necessary actions to avoid the instability of the transmission electrical system. The proposed approach is a signal-based method, which uses samples of electrical signals acquired by the phasor measurement unit (PMU) and processes them to extract the individual oscillations and, for each of them, determine their characteristic parameters such as frequency and damping. The method is based on Hilbert transformations, but it is optimized through further algorithms aiming at (i) improving the ability to separate different oscillatory components, even at frequencies very close to each other, (ii) enhancing the accuracy associated with the damping estimates of each oscillation, and (iii) increasing the robustness to the noise affecting the acquired signal. Results obtained in the presence of signals involving the composition of two oscillations, whose damping and frequency have been varied, are presented. Tests were conducted with signals either synthesized in simulated experiment or generated and acquired with actual laboratory instrumentation.

scholarly journals A Comparative Study between Traditional Backup Generator Systems and Renewable Energy Based Microgrids for Power Resilience Enhancement of a Local Clinic

Electronics ◽  
2019 ◽  
Vol 8 (12) ◽  
pp. 1485 ◽  
Author(s):  
Jamal Faraji ◽  
Masoud Babaei ◽  
Navid Bayati ◽  
Maryam A.Hejazi
Keyword(s):  
Energy Systems ◽  
Energy System ◽  
Sensitivity Analyses ◽  
Extreme Weather Events ◽  
Electrical Network ◽  
Emergency Situations ◽  
Electrical Systems ◽  
Cost Of Energy ◽  
Weather Events ◽  
Battery Energy

Extreme weather events lead to electrical network failures, damages, and long-lasting blackouts. Therefore, enhancement of the resiliency of electrical systems during emergency situations is essential. By using the concept of standby redundancy, this paper proposes two different energy systems for increasing load resiliency during a random blackout. The main contribution of this paper is the techno-economic and environmental comparison of two different resilient energy systems. The first energy system utilizes a typical traditional generator (TG) as a standby component for providing electricity during the blackouts and the second energy system is a grid-connected microgrid consisting of photovoltaic (PV) and battery energy storage (BES) as a standby component. Sensitivity analyses are conducted to investigate the survivability of both energy systems during the blackouts. The objective function minimizes total net present cost (NPC) and cost of energy (COE) by considering the defined constraints of the system for increasing the resiliency. Simulations are performed by HOMER, and results show that for having almost the same resilience enhancement in both systems, the second system, which is a grid-connected microgrid, indicates lower NPC and COE compared to the first system. More comparison details are shown in this paper to highlight the effectiveness and weakness of each resilient energy system.

The Research on the Automatic System of Circulating Garage in Stereo Car Parking

2013 ◽  
Vol 655-657 ◽  
pp. 1313-1316 ◽  
Author(s):  
Jian Zhang ◽  
Chuan Qi Wang ◽  
Wei Rong Wang ◽  
Xue Jing Gu
Keyword(s):  
Control System ◽  
Automatic System ◽  
Control Method ◽  
Parking Space ◽  
Electrical System ◽  
Parking Garage ◽  
Parking Lots

Currently, the number of cars in city is dramatically rising; meanwhile, car parking is becoming the serious problem in city. A way to solve this problem is to use the parking space efficiently; therefore, a control system of stable stereo circulating parking garage is introduced in this paper which contained multi-layers and various parking lots. The system adopted PLC as the primary controller. It discussed the structure of the hardware and software of its electrical system, and its control method in detail, in order to provide a new storing solution for stereo parking garage.

scholarly journals A New Fractional Particle Swarm Optimization with Entropy Diversity Based Velocity for Reactive Power Planning

Entropy ◽  
2020 ◽  
Vol 22 (10) ◽  
pp. 1112 ◽  
Author(s):  
Muhammad Waleed Khan ◽  
Yasir Muhammad ◽  
Muhammad Asif Zahoor Raja ◽  
Farman Ullah ◽  
Naveed Ishtiaq Chaudhary ◽  
...  
Keyword(s):  
Particle Swarm Optimization ◽  
Reactive Power ◽  
Cost Minimization ◽  
Operating Cost ◽  
Particle Swarm ◽  
Cumulative Distribution ◽  
Electrical Network ◽  
Swarm Optimization ◽  
Electrical Systems ◽  
Line Loss

Optimal Reactive Power Dispatch (ORPD) is the vital concern of network operators in the planning and management of electrical systems to reduce the real and reactive losses of the transmission and distribution system in order to augment the overall efficiency of the electrical network. The principle objective of the ORPD problem is to explore the best setting of decision variables such as rating of the shunt capacitors, output voltage of the generators and tap setting of the transformers in order to diminish the line loss, and improve the voltage profile index (VPI) and operating cost minimization of standard electrical systems while keeping the variables within the allowable limits. This research study demonstrates a compelling transformative approach for resolving ORPD problems faced by the operators through exploiting the strength of the meta-heuristic optimization model based on a new fractional swarming strategy, namely fractional order (FO)–particle swarm optimization (PSO), with consideration of the entropy metric in the velocity update mechanism. To perceive ORPD for standard 30 and 57-bus networks, the complex nonlinear objective functions, including minimization of the system, VPI improvement and operating cost minimization, are constructed with emphasis on efficacy enhancement of the overall electrical system. Assessment of the results show that the proposed FO-PSO with entropy metric performs better than the other state of the art algorithms by means of improvement in VPI, operating cost and line loss minimization. The statistical outcomes in terms of quantile–quantile illustrations, probability plots, cumulative distribution function, box plots, histograms and minimum fitness evaluation in a set of autonomous trials validate the capability of the proposed optimization scheme and exhibit sufficiency and also vigor in resolving ORPD problems.

Design of Computer Measurement and Control System for Electro-Hydraulic Stepping Cylinder

2011 ◽  
Vol 101-102 ◽  
pp. 1138-1141
Author(s):  
Sheng Hao Zhou ◽  
Jun Kai Cao ◽  
Jin Chun Song
Keyword(s):  
Control System ◽  
Hydraulic System ◽  
Electrical System ◽  
Measurement And Control System ◽  
Computer Measurement ◽  
Working Principle ◽  
And Control ◽  
Measurement And Control

To meet the requirements of measurement and control system for common servo-cylinder and considering the characteristics of electro-hydraulic stepping cylinder, a computer measurement and control system is designed. In this paper, the working principle of hydraulic system, the structure of electrical system, the process of measurements and the functions of testing software based on LabVIEW are introduced.

Wind and Electricity Supplementary Actuation Desalination Control System Research

2014 ◽  
Vol 577 ◽  
pp. 390-394
Author(s):  
Chang Xuan Ma ◽  
Zhen Ping Sun
Keyword(s):  
Control System ◽  
Vertical Axis ◽  
Water Desalination ◽  
Electrical Network ◽  
System Research ◽  
Vertical Axis Wind Turbine ◽  
High Pressure Pump ◽  
Final Assembly ◽  
And Control ◽  
Turbine Impeller

This article is the windward electricity supplementary actuation desalination control system conducts the research, With the wind directly driven desalination high pressure pump, Complemented by electricity network as a supplementary, When the wind is great, Also may the back coupling electrical network, This system according to the amount of water desalination successively calculated, design, Select vertical-axis wind turbine impeller, the transmission system, desalination system and control system, final Assembly and test.

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