Volume 19 (2019): Issue 2 (October 2019)

In this paper, a Discrete Wavelet Transform (DWT) has been utilized for processing the current signal in order to fault-location evaluation in network transmission using pre-fault and post-fault current data of both the terminals of a transmission line. In fact, the basis of the work is based on the information recorded before the fault at the end of the line and after the fault at the beginning of the line received by the relay. Obviously, high-frequency components are created at the time of the fault, which is a way of extracting these components using a wavelet transform. In this design, characteristics extorted from synchronous recording of three-phase current signals at the two terminals using DWT. In the following, can accurately estimate the exact location of the fault in the transmission network by extraction and subtracting of the minimum and maximum components of the DWT approximate and detail components of the signal before and after the fault (pre-fault and post-fault). The simulation results reveal that the minimum and maximum extracted components are highly dependent on the fault resistance. Hence, due to increase the fault resistance, the level of signal decomposition has to be increased so that the algorithm is not compromised. Eventually, the proposed method is tested on the transmission network of 735 kV at different distances of the transmission line, which indicates that the proposed algorithm can accurately estimate the fault distance, depending on the type of fault (including low-impedance and high-impedance fault) by changing the signal decomposition level.

Nowadays, Failure Mode and Effect Analysis (FMEA) is more present in any standard evaluation of a product or process. In automotive industry, the IEC 61508 Standard adapted the ISO 26262 restrictions for Electrical and Electronic Devices. Conducting an FMEA reduces the costs by focusing on preventing failures, improving safety and increasing customer satisfaction. This paper presents a case study of a FMEA on a CAN (Controller Area Network) Bus Harness considering the entire process from defining the scope and building the team, to the action plan that will reduce the Risk Priority Number below the acceptable risk value. Also, the brainstorming that identifies the possible failure modes is presented.

In the upcoming years (expected 2020), 5G technology is going to deploy all around the world. Presently a lot of researches and project on the fifth generation mobile communication system are finalized and tested successfully in the research labs. Within two to three years, 5G technology is going to replace the present technology and many mobile gadgets are coming with 5G support. The main focus of this technology is to provide better spectrum utilization, ultra speed communication, QoS, etc. In this article, the comprehensive analysis of next-generation mobile communication system is provided and it includes technologies employed for 5G. This work will give a detailed investigation and discussion on the features of 5G technology.

Nowadays, many factors lead to selection and utilization of distributed generations (DG) in distributed networks. But more penetration of DG's in network faced with problem due to existence of passive and inactive distribution networks. One of these essential issues is voltage rise due to injection of active power generated by DG's. That in this paper, control strategies for controlling of voltage profile of distribution network and adjustment of increase of DG's penetration is assessed and an optimal strategy for voltage rise with mathematical formulation is presented that will include both local and coordinated control approaches of reactive power generation. Finally, in this paper an implementation plan with smart control tools of DG's is suggested.

One of the most important issues in employing distribution networks is detecting the fault location in medium-voltage distribution feeders. Due to the vastness of distribution networks and growing distributed generation (DG) sources in this network, detection is difficult with the common methods. The aim of this paper is to present a method based on voltage distributed meters in a medium-voltage distribution network (by smart meters installed along the feeder) in order to detect the fault location in the presence of DG sources. Due to vastness of distribution network and cost of installing smart meters, it is not economically possible to install meters in all the Buses of the network. That’s why in this article, combination of genetic and locating algorithms and fault-based on voltage drop has been used to suggest a method to optimize the meter locations. In order to evaluate the efficiency of the method suggested, first we determine the optimal number and location of the meters and then we apply the fault that has been simulated in different Buses of the sample network, using PSCAD/EMTDC software. After results analysis, the fault location is estimated by MATLAB. Simulation results show that the fault locating method by optimal number of meters has good efficiency and accuracy in detecting faults in different spots and in different resistance ranges.

The paper generally seeks to demonstrate an in depth understanding of computer communication using Bluetooth. The working principle of this technology has to be fully understood and thus the software required to save the phone book to the computer needs to be developed and implemented and thus demonstrated on how it works. The paper clearly illustrates how reliable the Bluetooth phone book manager is in terms of creating a backup of one’s contacts. The software program is developed and then analysed in depth to understand the workability of the phone book manager which runs on any computer and is compatible with any phone. The hardware used is USB Bluetooth dongle, a cell phone and a computer.

Nowadays, phasor measurement units have many applications in the power network. Fault location using the network’s impedance matrix and phasor measurement units (PMU) is a subject that has been recently brought to the location light. In this research, we review the effect of the increased number of PMUs on the precision of the fault location. The method presented in this study uses the impedance transferring between these units and the fault location based on the fault distance. In the suggested method, the uncertainty on the network’s parameters has been considered and using the least-squares of faults, we can obtain the most optimal response. The advantage of this method is that it is not affected by the fault type and resistance of the short connection. In the end, the suggested method is implemented on the 14 bus distribution network and its performance has been evaluated.

In this paper it is proposed, for the local control of an autonomous mobile robot, the use of only a motherboard of an Android smartphone, instead of a full smartphone. Thus, in addition to presenting the mobile robot, it is shown how the control system was conceived and achieved. The control system does not contain the display or the touchscreen of the smartphone. The motherboard is connected to the motor driver via a standard interface called “Android ADK Interface”. Motion control is performed using an Android app that is run on the motherboard and that is automatically launched at the power up of the mobile robot. The app offers the possibility of automatic detection and bypass of obstacles and was created in the Android Studio programming environment.

The importance of the heating systems is given both by the quality brought to the social life and from the point of view of pollution. Environmental pollution, global energy crisis as well as global energy policy and our gas heating systems. This motivating reason for the heating system, in terms of their viability and pollution reductions, is the future. In this article a dual heating system is presented, while an electric heating system and one of the gases, the care is coordinated by a monitoring and control system. The operating strategy of the two systems is dictated by an algorithm and a cost optimization function. The use of a dual heating system is the result of comparative results regarding the measurement of the measures and the simulation of the algorithm.

As a critical constituent of many associations’ protection and security precedence, video surveillance has set up its importance and benefits numerous instances with the aid of imparting immediate supervising of possessions, people, surroundings and property. This paper deals with the diagram strategy of an embedded real-time surveillance gadget based totally on Raspberry-Pi single board computer (SBC) for intruder detection which is reinforcing technology of surveillance to supply fundamental security to our life and associated control and alert operations. The suggested safety solution is hinging on our novel integration of cameras and action detectors into application of web. Raspberry-Pi is operating and controlling action detectors and video cameras for far flung sensing and surveillance, streams live video and files it for future playback. Also, this paper is focusing on growing a surveillance machine that detects strangers and to response speedily through taking pictures and relaying photos to proprietor based totally wireless module. This Raspberry-Pi based clever surveillance machine presents the concept of monitoring a region in a far-flung area. The suggested solution offers a fee advantageous ubiquitous surveillance solution, environment friendly and convenient to implement. Furthermore, the paper presents the idea of motion detection and tracking using image processing. This type of technology is of great importance when it comes to surveillance and security. Live video streams therefore be used to show how objects can be detected then tracked. The detection and tracking process are based on pixel threshold.

This article presents the testing of a wireless power transmission system (WPT) in order to obtain the operating parameters for the optimal design of the WPT systems. The system is based on the inductive transfer of wireless energy and is configured for a large range of electrical appliances whose mobility requires the efficient charging of electricity (smartphone, laptop, vacuum cleaner).