i-manager's Journal on Electrical Engineering (JEE)


Volume 13 Issue 3 January - March 2020

Research Paper

Comparative Analysis of Mitigation Methods for Overvoltage in Adjustable Speed Drive

Rashmi B.* , Chandrashekhar Badachi**
*-** Department of Electrical and Electronics Engineering, MS Ramaiah Institute of Technology, Bangalore, Karnataka, India.
Rashmi, B., & Badachi, C. (2020). Comparative Analysis of Mitigation Methods for Overvoltage in Adjustable Speed Drive, i-manager's Journal on Electrical Engineering, 13(3), 1-9. https://doi.org/10.26634/jee.13.3.14749

Abstract

Many of the industrial applications require long power cables to connect the motor and Adjustable Speed Drive (ASD). The Pulse Width Modulated (PWM) inverter output voltage pulses and long cable length connecting the motor and ASD are the typical causes of over voltage inside drive. This high inverter output voltage (dv/dt) pulses and the impedance mismatch between motor and cable causes voltage reflection phenomenon. The reflected pulse creates over voltage condition that causes voltage stress inside the drive. This paper presents comparative study of over voltage mitigating methods for ASD, which includes RC clamp circuit method and LC filter method. The effectiveness of the clamp circuit method and LC filter method is verified by MATLAB/SIMULINK simulation. From the results obtained, it can be seen that the increase in length of cable increases over voltage and also RC clamp circuit is the simple and effective way to mitigate the overvoltage.

Research Paper

Power Generation Module from Exhaust Gas

M. Santhosh * , Sankari Ashok Alshiya **, J. Shidharth ***, V. K. Santhosh ****
*-**** Department of Mechanical Engineering, SRM Valliammai Engineering College, Chennai, India.
Santhosh, M., Alshiya, S. A., Shidharth, J., & Santhosh, V. K. (2020). Power Generation Module from Exhaust Gas, i-manager's Journal on Electrical Engineering, 13(3), 10-15. https://doi.org/10.26634/jee.13.3.16740

Abstract

Loss of energy is generally transferred to the atmosphere on any physical, chemical or mechanical change by any process engine. On any mechanical engine that uses fuel, flue gas is emitted after combustion. This can be used as an input for generating electricity. The idea is that when the exhaust gas is made to hit the turbine placed near to it, tends to rotate. This rotational movement is converted into electric power by using direct current (DC) generator. The material for the turbine should be good enough to withstand the force, chemicals and heat emitted through the exhaust gas. To avoid slippages the turbine and the shaft should be fitted with appropriate couplings. The generated electricity is used to power the Day time Running Lights (DRL, which is mandatory according to Bharat Stage Emission Standards (BSES) – IV norms for all vehicles.

Research Paper

Fractional Order Control of Multilevel Boost Converter for Photovoltoic System

V. Anil Kumar* , M. Arounassalame **
*-** Department of Electrical and Electronics Engineering, Pondicherry Engineering College, Pondicherry, India.
Kumar, V. A., & Arounassalame, M. (2020). Fractional Order Control of Multilevel Boost Converter for Photovoltoic System, i-manager's Journal on Electrical Engineering, 13(3), 16-23. https://doi.org/10.26634/jee.13.3.16773

Abstract

This paper presents a novel control scheme based on the fractional order PI controller for a high gain multilevel boost converter. Non-conventional energy resources such as solar PV cells produce DC output voltages, which are continuously change with weather conditions. It is necessary to obtain a constant DC voltage from such systems to use them for battery charging applications. The voltage gain obtained using the traditional boost converter is very limited. Switched capacitor circuit can act as a multiplier circuit and can be combined with boost converters to increase the gain. Even though the output voltage from this converter meets the requirement of high output voltage, but heavy fluctuations in the solar energy makes this system inefficient to use for battery charging applications where a constant DC voltage is required. In this paper, a control scheme is proposed for this high gain multilevel boost converter circuit using Fractional Order PI (FOPI) controller. Modeling of the high gain boost converter is required for the design of fractional order controller. A reduced order model is developed for the high gain DC-DC converter and the transfer function is obtained from this. The parameters of the FOPI controller are designed using the fractional order toolbox FOMCON. The performance of the proposed converter is compared with the conventional PI controller and the superiority of the proposed converter was proved in terms of bench mark performance measures. The simulation was carried out in MATLAB/SIMULINK and the fractional order toolbox FOMCON is used to design and simulate the FOPI controller.

Research Paper

Hybrid PV and Wind Based Energy Optimized Control Scheme by Using FACTS and PSO Technique

Krishna Sarker* , Tanmoy Chakraborty **, Sayan Paramanik ***, Jayanti Sarker ****, Satadal Mal *****, Utpal Biswas ******
*,**** Department of Electrical Engineering, Techno India Group, Kolkata, West Bengal, India.
** Department of Computer Science and Engineering, Saroj Mohan Institute of Technology, Hooghly, West Bengal, India
*** Autometers Alliance Ltd., Noida, Uttar Pradesh, India.
***** Department of Electrical Engineering, Kalyani Government Engineering College, Kalyani, Nadia, India.
****** Department of Computer Science and Engineering, University of Kalyani, Nadia, India.
Sarker, K., Chakraborty, T., Paramanik, S., Sarker, J., Mal, S., & Biswas, U. (2020). Hybrid PV and Wind Based Energy Optimized Control Scheme by using Facts and PSO Technique, i-manager's Journal on Electrical Engineering, 13(3), 24-37. https://doi.org/10.26634/jee.13.3.16784

Abstract

Nowadays, due to various types of load variation in power grid makes the stability issues. This paper represents a PV-Wind based hybrid system connected to a Flexible Alternating Current Transmission System (FACTS) controller with Micro-grid (MG), which is controlled by three-phase Multilevel Inverter (MLI) using Particle Swarm Optimization (PSO) algorithm. Solar cells are connected in series or parallel to built-in PV array. A battery or super capacitor is used to store the generated energy that supplies the voltage to three-phase inverter during the deficiency of sunlight and wind. MPPT controller is connected, which is capable of extracting maximum power from PV array. The proposed technique can efficiently mitigate the power quality problem, for example, voltage interruption, sag, swell, flicker, reactive power, unbalanced neutral current, current and voltage harmonics. PSO algorithm is applied for calculating the exact switching angles for the proposed inverter at each modulation index, considering the minimum total harmonic distortion for the output voltage. The proposed topology improved the voltage harmonics and current harmonics, which includes the enhanced active and reactive power. The optimum inverter switching angles are computed off-line to remove the selected lower order harmonics and suppress the higher order harmonics. The calculated switching angles are stored in micro controller processor memory using mixed model equation for online application. This work concluded that the mode of Unified Power Quality Conditioner (UPQC) performance is significantly better compared to Static Synchronous Compensator (STATCOM) and Dynamic Voltage Restorer (DVR) models. Both the simulation and experimental results agree well with the analytical formulation.

Research Paper

Comparison of Single Loop and Cascade Loop Control of BLDC Motor Drive

Manoj Kumar Merugumalla*
Department of Electrical and Electronics Engineering, Tirumala Engineering College, Jonnalagadda, Andhra Pradesh, India.
Merugumalla, M. K. (2020). Comparison of Single Loop and Cascade Loop Control of BLDC Motor Drive, i-manager's Journal on Electrical Engineering, 13(3), 38-45. https://doi.org/10.26634/jee.13.3.16858

Abstract

This paper is aimed at the speed control of a Brushless Direct Current (BLDC) motor drive, for which a single loop control and cascade system of control is established and the performance of the drive system is compared. Initially, the drive system is modeled in a single loop using transfer function model. Then it is modeled with cascaded loops. Both the models are simulated using MATLAB/SIMULINK. Magnitude optimum multiple integration tuning method has been introduced for BLDC motor drive system to tune PID controller parameters. By performing various simulation tests with and without disturbances at supply side, load side and under set-point changes, the simulation results show that the cascade control system has better performance than single loop control no matter where the disturbances enter and sudden changes occur at the reference speed of the drive system.