The Teaching of Switched Mode Power Supplies - Design, Simulation and Practical Implementation for Undergraduate and Postgraduate Students

© 2018 IEEE. The teaching of switched mode power supplies can be very challenging. For example, do we just teach the operation of the power supplies? Is teaching a topology enough to produce a graduate capable of designing power supplies for the highest specifications? Should we consider other details like EMI, thermal effects and packaging in the design? What will happen if we ignore them? Should these details be considered at the simulation stage, or only when it comes to manufacturing phase? This paper covers all the steps required for the design procedure of switched mode power supplies. The paper can be used in developing practical/simulation courses in power electronics for teaching the design of switched mode power supplies

Impacts of domestic load and electric vehicles on domestic consumption in UK

This paper highlights domestic consumption of electricity in UK and effect of electric vehicles on the domestic demands. Also, consider the trends and growth of domestic electricity demand and the implication of using the electric vehicles. One challenging factor is the management of the domestic load electricity demand on the electric vehicles. To this end, this paper investigates new management technology technique that can be used in domestic sector. The key point to tackle this problem is to outline pattern shape of the electricity usage per individual household. However, lack of information on individual usage per consumer is complicating the path to the new solutions. Data were collected from daily energy consumption and energy peak demands from UK electricity industries. In additional the research explores the effect of recently introduced UK energy plan to reduce the CO2 emission and how this affects usage of the electric vehicle. The proposal in the new solutions includes the use of renewable energy sources such as solar panels and batteries banks for domestic supply. This would go a long way to reducing electricity demand as well as reduce CO2 emission from domestic sector

Virtual Power Electronics Labs for Online Teaching

A textbook and traditional classroom only approach in teaching power electronics can mean that design of power electronic circuits could be isolated and will be difficult to absorb by students. If we add to this, the sudden switch to virtual delivery of lectures then the challenge to engage the students in the learning process of power electronics could be even more complicated. In this paper, a virtual way of teaching power electronic circuits without much compromise with real practical environment is presented. A boost and flyback converter circuits are presented as a case study where all practical parameters are considered in the 'virtual' practical circuit

Emulations of Overvoltage and Overcurrent Relays In Transmission Lines

An 'Over Voltage Relay' is one of the protective relays which operates when the voltage exceeds a preset value. In a typical application the over voltage relay is used for over voltage protection, which is connected to a potential transformer, and calibrated to operate at or above a specific voltage level. An 'Under Voltage Relay' and an 'Over Current Relay' are also protective relays which operate when the voltage is reduced, or the current is increased below or above a preset value. In a typical application these relays are connected to potential transformers, and calibrated to operate at, above or below a specific voltage or current levels. The emulator used in paper simulated experiments of all three types of relays mentioned above. The transmission line emulator used in this paper is an HVAC transmission line of length of 180 km. The transmission line of the emulator can be used as a 3-phase transmission line of 180 km length or as a single-phase transmission line of 540 km long. This transmission line in the emulator is divided into 6 $\pi$ sections and each $\pi$ section is 30 km long. The line inductance of the transmission line of the emulator is examined for every 30 km and the line capacitance is examined for every 15 km. The line parameters of the emulator (RLC) for the 400kV transmission line are: 0. 02978$\Omega$/km, 1.06 mH/km and 0.0146 $\mu$F/km, respectively

Simulation of HVAC Transmission Line

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Energy Efficient Snubber Networks

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Review of battery management systems

In this work the authors investigate the different parts and functions offered by Battery Management Systems (BMS) specifically designed for secondary/rechargeable lithium batteries. Compared to other chemistries, lithium batteries offer high energy density and cell voltage, which makes them the most attractive choice for electronic devices including EV and RES. However, lithium technology is vulnerable and highly susceptible to catastrophic failures which result in fire. Hence, the use of electronic safety designs is a must. BMS are responsible for the monitoring of the battery state, ensuring operation within safe limits. BMS offer multiple functionalities with the state of charge (SoC) estimation being the most challenging hence the most studied by engineers. All estimation methodologies and algorithms have pros and cons, which best suits the application that is developed for. This research concludes that according to designers, the optimum BMS provides battery packs with the needed protection, good functioning conditions and accurate prediction for the battery's state including charge and life. Finally, this research presents and validates an SoC algorithm based on the reformulated Peukert's equation which is also valid for variable load and multi-pulsing scenarios with an accuracy exceeding 95%