Maximum Power Point Tracking in Solar PV systems using Artificial Neural Networks

Volume 6 Issue 4 November - January 2019

Research Paper

Maximum Power Point Tracking in Solar PV systems using Artificial Neural Networks

Jyotsana Pandey*

* Department of Electrical Engineering, Raipur Institute of Technology, Raipur, Chhattisgarh, India.

Pandey, J. (2019). Maximum Power Point Tracking in Solar PV systems using Artificial Neural Networks i-manager’s Journal on Power Systems Engineering, 6(4), 45-52. https://doi.org/10.26634/jps.6.4.16409

Abstract

Maximum power point tracking (MPPT) is critical in the design and use of solar PV cells. However, attaining MPPT is often challenging due to the random fluctuations in solar irradiation. Off late Artificial Neural Networks (ANN) are being used for maximum power point tracking of solar PV cells. In the proposed work, the Levenberg-Marqardt (LM) algorithm has been used to train a neural network with training features. Subsequently, the neural network is tested and an accuracy of 98.84% has been achieved. The high accuracy can be attributed to the structuring of the training data and the effectiveness of the Levenberg Marqardt back-propagation algorithm which is both fast and stable. The performance of the system has been evaluated in terms of the number of epochs for training, the mean absolute percentage error, accuracy and regression.

Distribution Network Reconfiguration using GA & BPSO

Volume 6 Issue 4 November - January 2019

Research Paper

Distribution Network Reconfiguration using GA & BPSO

P. V. Prasad*, M. Balasubba Reddy**

*_** Department of Electrical and Electronics Engineering, Chaitanya Bharathi Institute of Technology(A), Hyderabad, India.

Prasad, P.V., and Reddy, M. B. S. (2019). Distribution Network Reconfiguration using GA & BPSO. i-manager’s Journal on Power Systems Engineering, 6(4), 37-44. https://doi.org/10.26634/jps.6.4.15802

Abstract

As increase in the high demand utilization of electrical energy over few decades the power loss issue is persevered. In order to minimize the power losses, various methods are followed in distribution system such as capacitor placement, distribution generator placement and proper conductor selection methods. In all these methods, lot of money is to be invested to decrease the losses. The network reconfiguration method is one, where investment for loss reduction is minimum. By changing the position of sectionalizing and the tie switches the distribution system reconfiguration is done to minimize the power losses. In this paper, Genetic Algorithm (GA) and Binary Particle Swarm Optimization (BPSO) techniques are used for distribution system reconfiguration. The performance of the two algorithms is tested with two different test systems i.e. 33 and 69 node radial distribution systems. The outcomes illustrate that after reconfiguration the power loss is minimized and voltage profile is improved. Finally the results of the two algorithms are compared and found that BPSO has given better results compared to Genetic Algorithm.

Peak Power Tracking Technique for a Small-Scale Photovoltaic System

Volume 6 Issue 4 November - January 2019

Research Paper

Peak Power Tracking Technique for a Small-Scale Photovoltaic System

Amine Daoud*

* Department of Electronics, Faculty of Electrical Engineering, University of Sciences and Technology of Oran, Oran, Algeria.

Daoud, A. (2019). Peak Power Tracking Technique for a Small-Scale Photovoltaic System. i-manager’s Journal on Power Systems Engineering, 6(4), 22-36. https://doi.org/10.26634/jps.6.4.16047

Abstract

A photovoltaic (PV) generator can directly transform the sun's rays into usable electric power. The power-voltage characteristic of PV generator is highly nonlinear and its optimal power point varies with sunlight intensity and temperature. Thus, to increase the efficiency of a PV system, it is important to track the optimal power point instantly. This paper presents a simple variable step-size maximum power point tracking (MPPT) technique for a small-scale PV system. The latter is composed of a PV array, a DC/DC power converter, and a DC motor-pump. Furthermore, using this technique, only the output voltage of the switching converter needs to be sensed in order to track the optimal power point. Compared with classical Perturbation & Observation (P&O) technique, the proposed MPPT technique can largely improve the MPPT efficiency and the total volume of water pumped a day. Also for comparison purpose, the artificial neural network (ANN) based MPPT technique is addressed in this manuscript. Moreover, the MPPT techniques considered in this study are applied to a solar-powered water pumping system under different climate conditions. Finally, mathematical modeling and computer simulations of such small-scale PV system are performed using the MATLAB environment.

Mitigation of Torsional Oscillations via Interval Type-2 Fuzzy Logic Based Chopper Rectifier Controlled Braking Resistor

Volume 6 Issue 4 November - January 2019

Research Paper

Mitigation of Torsional Oscillations via Interval Type-2 Fuzzy Logic Based Chopper Rectifier Controlled Braking Resistor

M. Fayez*, M. Mandor**, M. El-Hadidy***, F. Bendary****

* Cairo Electricity Production Company (CEPC), Cairo, Egypt.

**,**** Electrical Engineering Department, Faculty of Engineering Shoubra, Benha University, Cairo, Egypt.

*** Egyptian Electricity Holding Company (EEHC), Cairo, Egypt.

Fayez, M., Mandor, M., El-Hadidy, M., and Bendary, F. M. (2019). Mitigation of Torsional Oscillations via Interval Type-2 Fuzzy Logic Based Chopper Rectifier Controlled Braking Resistor. i-manager’s Journal on Power Systems Engineering, 6(4), 11-21.https://doi.org/10.26634/jps.6.4.16079

Abstract

Autoreclosrure is an indispensable protection scheme firstly designed for enhancing the power system stability especially in countries with high isokeraunic levels. Its unsuccessful operation would much more likely cause dire consequences on the thermal power plants in the vicinity. Therefore, almost all major utility-scale turbine-generator suppliers have been expressing concern about performing autoreclosing activities near the generator bus. A resistor brake interfaced to the grid through power electronic devices is a special FACTS controller. A more recent resistor model, namely Chopper Rectifier Controlled Braking Resistor controlled via Interval Type-2 fuzzy logic controller is proposed in this work for mitigation of torsional oscillations resulting from unsuccessful reclosure. Local control input signal synthesized from the generator shaft speed is employed in this work for the proposed controller. For testing the effectiveness of the proposed scheme, non-linear time-domain simulation study is performed on the Western System Coordinated Council, 3-machine 9-bus system via MATLAB/Simulink-based modelling and simulation platform. Comparative simulation studies of the test system after being subjected to unsuccessful reclosure of three-phase to ground fault condition should demonstrate the effectiveness of proposed scheme. From the time domain simulation results, the torsional torque profiles for both machines reach an excellent level due to the implementation of the proposed scheme.

Different Energy Conservation Techniques for Various Operations in Opencast Mine

Volume 6 Issue 4 November - January 2019

Article

Different Energy Conservation Techniques for Various Operations in Opencast Mine

Virendra Kumar*, Arnab Bhuiya **, Aditi Chatterjee***, S. K. Chaulya****, Gautam Banerjee*****

*, ***_***** CSIR-Central Institute of Mining & Fuel Research, Dhanbad, Jharkhand, India.

** M. Tech. Scholar of Mine Machinery, IIT-ISMS, Dhanbad, Jharkhand, India

Kumar, V., Bhuiya, A., Chaaterji, A., Chaulya, S. K., and Banerjee, G. (2019). Different Energy Conservation Techniques for Various Operations In Opencast Mine. i-manager’s Journal on Power Systems Engineering, 6(4), 1-10.https://doi.org/10.26634/jps.6.4.15845

Abstract

Conservation of natural resources by increasing the energy efficiency is the primary objective. With increment in the power requirement, there is substantial pressure on innovation and designers are required to take into account the upgrade energy efficient electrical systems. In the current circumstance, the need for energy is substantial, and control of resources is constrained; considering the mining business the foundation of development in any nation requires a great efforts on the sustenance of electric power. The principle objective of this study is the energy conservation in mines by supplanting conventional system with the current innovative systems that would greatly reduce utilization of electricity. In this study, the different electrical equipment that are utilized in the opencast coal mines are recorded with their details and operations. The recommendations are given as per the improvement of PF (Power Factor) of different machines using different customary techniques in the opencast mines where electrical vitality is being squandered. The protection process can be actualized in various mining perspectives and devices like brightening, haulers, transports, penetrating and impacting equipment's, cutting apparatuses and crushers, dragline, dumper, scoop, scrubber and other electrical equipment.

Spectacular Simulation Review - Analysis of different wind turbine companies by Weibull Analysis

Volume 6 Issue 3 August - October 2018

Review Paper

Spectacular Simulation Review - Analysis of different wind turbine companies by Weibull Analysis

Sunil Kumar Jilledi*, Shalini J.**, Ashok Kumar Mechiri***

* Research Scholar, OPJS University, Churu, India, and Lecturer, Department of Electrical and computer Engineering, Mainefhi College of Engineering and Technology, Eritrea, East Africa

** Assistant Professor, Department of Dairy Engineering, Dairy Technology College, Sri Venkateswara Veterinary University, Andhra Pradesh, India.

***Associate Professor, Eritrea Institute of Technology, Asmara, Eritrea, East Africa.

Jilledi, S. K., Shalini, J., and Mechiri, A. K., (2018). Simulation Review - Analysis of Different Wind Turbine Companies by Wei bull Analysis for Powers Tacular. i-manager’s Journal on Power Systems Engineering, 6(3), 32-42.https://doi.org/10.26634/jps.6.3.15709

Abstract

Renewable energy sources are playing a vital role in the power sector. Among the renewable energy sources, wind energy is playing a vital role. As the power of wind energy system increases, the control of their system becomes complex. Active and reactive power becomes increasingly more important from a system to satisfy the load demand for the consumers. To improve the power production, in the market, many companies are in the competition. Weibull analysis is used for analysis of wind speed. Based on the wind probability distribution function (pdf), the power curve and power distribution is calculated. This paper provides the detail set of power production of different types of wind power plants. A case study has been performed using simulation software by considering the base data of the companies.

Reliability Assessment of Radial Distribution System with Different Automation Schemes of One and Half Breaker Substation

Volume 6 Issue 3 August - October 2018

Research Paper

Reliability Assessment of Radial Distribution System with Different Automation Schemes of One and Half Breaker Substation

S. Deepti*, E. Vidya Sagar **

* Associate Professor, Department of Electrical and Electronics Engineering, Bhoj Reddy Engineering for Women, Hyderabad, Telangana India.

** Associate Professor, Department of Electrical Engineering, Osmania University, Hyderabad, Telangana, India.

Deepti, S., and Sagar, E. V. (2018). Reliability Assessment of Radial Distribution System with Different Automation Schemes of One and Half Breaker Substation. i-manager’s Journal on Power Systems Engineering, 6(3), 26-31.https://doi.org/10.26634/jps.6.3.15306

Abstract

A radial distribution system consists of 33/11 kV substation, 11kV feeders, distribution transformers, service mains and load points. The reliability of the radial distribution system has a significant influence on overall power system reliability. One of the method to improve the reliability of distribution system is automating both the substation and feeders. The automation process will reduce the restoration time after occurrence of fault and hence the annual average outage duration of load points decreases. In this paper (i) the effect of centralized star and redundant star automation schemes on load points of one and half breaker substation, (ii) the reliability indices of 11 kV radial feeder for non-automated and iii) automated scheme are evaluated. Further, the reliability indices of the complete distribution system for the above said cases are evaluated. Reliability of substation is evaluated using cut-set method and reliability of feeder is evaluated using Failure Mode and Effective Analysis Method (FMEA). Results obtained shows that redundant star automation scheme is better over the centralized star automation scheme. It is also concluded from the results that redundant star substation and feeder automation have more effective impact on distribution reliability.