Parallel Operation of Two Single-Phase Rectifiers with Three-Phase Inverter by Implementing Generalized SVPWM

Volume 6 Issue 2 May - July 2018

Research Paper

Parallel Operation of Two Single-Phase Rectifiers with Three-Phase Inverter by Implementing Generalized SVPWM

Srinivas Singirikonda*, Geetha Chapal**

* Assistant Professor, Department of Electrical and Electronics Engineering, TKRCET, JNTUH, Hyderabad, India.

** M.Tech Scholar, Department of Electrical and Electronics Engineering, TKRCET, JNTUH, Hyderabad, India.

Singirikonda, S., and Chapal, G. (2018). Parallel Operation of Two Single-Phase Rectifiers with Three-Phase Inverter by Implementing Generalized SVPWM. i-manager’s Journal on Power Systems Engineering, 6(2), 28-36.https://doi.org/10.26634/jps.6.2.15060

Abstract

In this paper, a parallel five-leg (P5L) operation of two single-phase rectifiers with three-phase inverter by implementing generalized Space Vector Pulse Width Modulation (SVPWM) is proposed, consisting of two parallel 1-phase half-bridge rectifiers with shared leg. This configuration facilitates the continuity of power flow among the switches though if one switch fails to operate, and reduces the power losses at both rectifier and inverter circuits. The proposed topology is evaluated by connecting 3-phase Induction Motor (IM), which is controlled by SVPWM. The SVPWM is a generalized modulation of PWM derived from Sinusoidal Pulse Width Modulation (SPWM) combination of common-mode voltage. It facilitates the outcomes of the conventional SVPWM with the generalized SVPWM. This power conversion is attained by maintaining the DC-link voltage by using capacitors. This strategy facilitates the balancing of current and voltage at the DC-link. A comparative analysis of machine characteristics with SPWM and SVPWM topology is done. The MATLAB simulation results are analyzed and represented.

Predictive Current Control for Zero D-Axis Current Control of PMSG Based Wind Energy Conversion System

Volume 6 Issue 2 May - July 2018

Research Paper

Predictive Current Control for Zero D-Axis Current Control of PMSG Based Wind Energy Conversion System

Tripura Pidikiti *, G. Tulasi Ram Das **

* Assistant Professor, Department of Electrical and Electronics Engineering, RVR & JC College of Engineering, Guntur, Andra Pradesh,India.

** Professor, Department of Electrical and Electronics Engineering, Jawaharlal Nehru Technological University College of Engineering, Hyderabad, India.

Pidikiti, T., and Das, G.T.R. (2018). Predictive Current Control for Zero D-Axis Current Control of PMSG Based Wind Energy Conversion System. i-manager’s Journal on Power Systems Engineering, 6(2), 20-27. https://doi.org/10.26634/jps.6.2.15295

Abstract

In this paper, the Predictive Current Control (PCC) strategy for back-to-back (BTB) voltage source converters used in Permanent Magnet Synchronous Generator (PMSG), Wind Energy Conversion System (WECS) was explained. PCC is used to control the system, where the discrete time models of the BTB converters are used to predict the future state of control variables. Two cost functions are used to evaluate these predictions, and switching states which will minimize these cost functions will be selected and applied to generator side and grid side converter. The control requirements like Maximum Power Point Tracking (MPPT), Direct Current (DC) link voltage regulation and reactive power generation to the grid are satisfied by the PCC approach. Complete procedure for the MATLAB/Simulink implementation of predictive model, extrapolation and cost function employed in the implementation of PCC scheme are presented along with the comparison of the performance of Wind Energy Conversion System (PMSG WECS) and back-to-back (BTB) converter with conventional control technique.

Description and Examination of Optima Power Flow Using Traditional and Stochastic Optimization Techniques

Volume 6 Issue 2 May - July 2018

Research Paper

Description and Examination of Optima Power Flow Using Traditional and Stochastic Optimization Techniques

Ragaleela D.*, Sivanagaraju S.**

* Senior Assistant Professor, Department of Electrical and Electronics Engineering, PVPSIT, Vijayawada, Andhra Pradesh, India.

** Professor, Department of Electrical and Electronics Engineering, JNTUK, Kakinada, Andhra Pradesh, India.

Ragaleela, D and Sivanagaraju, S. (2018). Description and Examination Of Optima Power Flow Using Traditional and Stochastic Optimization Techniques. i-manager’s Journal on Power Systems Engineering, 6(2), 12-19. https://doi.org/10.26634/jps.6.2.14934

Abstract

In modern power systems, optima power flow plays a crucial role in optimizing different types of objective functions for progress and outlining. The purpose of Optima Power Flow (OPF) problem is to attain the optima solution of a considered test system objective function, like fuel cost and loss minimization by fine tuning the power system control variables. In this paper a new stochastic hybrid method, Particle Movement Bee Colony Algorithm (PMBCA) based on Particle Swarm Optimization (PSO) and Honey Bee Colony (HBC) is proposed in addition to existing methods. Comparisons of various traditional and heuristic optimization methods are considered to solve the OPF problems. The utility and efficacy of suggested algorithms is exemplarily tested on the IEEE 30-bus test system. Results prove that the PMBCA algorithm gives better solution and convergence characteristics to enhance the system performance compared with other methods.

A Synchronized-Phasor-Measurements-Based Wide Area Protection Scheme for Transmission Lines

Volume 6 Issue 2 May - July 2018

Research Paper

A Synchronized-Phasor-Measurements-Based Wide Area Protection Scheme for Transmission Lines

Mohamed A. Ebrahim *, Fady Wadie**, Mousa A. Abd-Allah ***

* Associate Professor, Faculty of Engineering at Shoubra, Benha University, Cairo, Egypt.

** Assistant Lecturer, Faculty of Engineering, Egyptian Russian University, Badr City, Egypt.

*** Professor, Faculty of Engineering at Shoubra, Benha University, Cairo, Egypt.

Ebrahim, M. A., Wadie, F., and Abd-Allah, M.A. (2018). A wide-area based Fault detection scheme for series compensated transmission networks. i-manager’s Journal on Power Systems Engineering, 6(2), 1-11. https://doi.org/10.26634/jps.6.2.14850

Abstract

As a result of the problems facing conventional back-up protection, wide area backup protection schemes had shown to be a great alternative. For this reason, a new fault detection scheme is presented in this paper as a part of a wide area backup protection. The scheme relies on the Loss of Synchronism of Buses Index (LSBI), which monitors the sent and received positive sequence power across each lines. The phasor measurement unit provides the positive sequence measurements which are used to calculate the positive sequence powers sent and received at the terminals of each line. The LSBI seeks to find the power consumed within each line by finding the difference between these powers. A predefined threshold value is set for every line in order to be compared for the LSBI of the line to reach decision whether there is a fault on this line or not. The proposed scheme was tested upon New-England NE 39-bus and Western System Coordinating Council (WSCC) 9-bus systems using MATLAB/Simulink software package. The scheme showed its ability to operate correctly even in critical cases such as voltage or current inversion. The proposed scheme proved to be reliable in operation and free of mathematical errors.

Design of a Grid Connected PV System and Effect of Various Parameters on Energy Generation

Volume 6 Issue 1 February - April 2018

Research Paper

Design of a Grid Connected PV System and Effect of Various Parameters on Energy Generation

Namita P. Deodhe *, Deepak Bankar**

* M.Tech Scholar, Department of Electrical Engineering, Bharati Vidyapeeth College of Engineering (Deemed to be University), Pune, Maharashtra, India.

** Professor and Head, Department of Electrical Engineering, Bharati Vidyapeeth College of Engineering , (Deemed to be University),Pune, Maharashtra, India.

Deodhe, P. N., and Bankar, D. (2018). Design of a Grid Connected PV System and Effect of Various Parameters on Energy Generation. i-manager’s Journal on Power Systems Engineering, 6(1), 41-48. https://doi.org/10.26634/jps.6.1.14023

Abstract

Power is one of the key infrastructures for growth of industry and economy. Over the past two years, India's economy expanded at an average annual rate of 7.3% to 7.6%, placing it among the top five fastest growing nations in the world. To promote the grid connected solar power plant among the residential areas is focused now a days. Photovoltaic system simulation software is very significant to estimate the output from photovoltaic system. This paper introduces PVSyst software for sizing of grid connected photovoltaic system at Bharti Vidyapeeth Deemed University College of Engineering, Pune, Maharashtra, India.

This paper introduces the detailed system design (PV array and Inverter), and system output and system losses are studied using PVSyst software. Also, loss diagram of PV array and Inverter is obtained. By changing tilt angle, optimum output is achieved for the system. Plant of AC capacity of 100kW is simulated in the software and it was found that the optimal energy generation will be at 18° tilt angle, which can provide electricity to university throughout the year. Pitch is varied to get optimum output. Also simulations for various PV cell technologies are carried out.

Comparative Analysis of Harmonics by Shunt Active Filter using Resonant Current Control in Distribution System

Volume 6 Issue 1 February - April 2018

Research Paper

Comparative Analysis of Harmonics by Shunt Active Filter using Resonant Current Control in Distribution System

B. Pattabhiram*, M. Sai Veerraju **

* PG Scholar, Department of Electrical and Electronics Engineering, SRKR engineering College, Bhimavaram, Andhra Pradesh, India.

** Professor, Department of Electrical and Electronics Engineering, SRKR Engineering College, Bhimavaram, Andhra Pradesh, India.

Pattabhiram , B., and Veerraju, M. S., (2018). Comparative Analysis of Harmonics by Shunt Active Filter using Resonant Current Control in Distribution System. i-manager’s Journal on Power Systems Engineering, 6(1), 35-40.https://doi.org/10.26634/jps.6.1.14306

Abstract

Wide-range utilization of nonlinear loads creates harmonic resonance issues in radial distribution system. This paper presents a comparative analysis of harmonic resonance using Proportional Resonant(PR) controller and Fuzzy controller based active filter, by using resonant current control. For controlling active filter as an approximately pure harmonic conductance, collections of different parallel band-pass filters are tuned for resonant current controller at harmonic frequencies. The MATLAB/SIMULINK results demonstrate that the fuzzy logic controller based active filter improves higher damping performance compared with PR controller.

A New Hybrid Cuckoo Search-Artificial Bee Colony Approach for Optimal Placing of UPFC Considering Contingencies

Volume 6 Issue 1 February - April 2018

Research Paper

A New Hybrid Cuckoo Search-Artificial Bee Colony Approach for Optimal Placing of UPFC Considering Contingencies

Siva Sankar Akumalla*, Bharath Kumar Polineni **, Sujatha Peddakotla ***

* Senior Lecturer, Department of Electrical and Electronics Engineering, Government Polytechnic, Proddatur, Kadapa, Andhra Pradesh , India.

** Lecturer, Department of Electrical and Electronics Engineering, JNTUA College of Engineering, Ananthapuramu, Andhra Pradesh, India.

*** Professor, Department of Electrical and Electronics Engineering, JNTUA College of Engineering, Ananthapuramu, Andhra Pradesh, India.

Akumalla, S, S., Polineni, B. K., and Peddakotla, S. (2018). A New Hybrid Cuckoo Search-Artificial Bee Colony Approach for Optimal Placing of UPFC Considering Contingencies. i-manager’s Journal on Power Systems Engineering, 6(1), 26-34.https://doi.org/10.26634/jps.6.1.14308

Abstract

The Optimal Power Flow (OPF) is a specialised area of power system, that generally requires solving nonlinear optimization problems. The OPF formulation, when includes generators' operating constraints and Flexible AC Transmission Systems (FACTS) devices becomes profoundly complicate multi-objective optimization problem. To target the multi-objective solution, Metaheuristic algorithms have been favored as they give promising results in many such optimization cases. Herein, developing and evaluating a new hybrid method, such as a blend of two simulation-based metaheuristic methods, Cuckoo-Search (CS) and Artificial Bee Colony (ABC) algorithms was focussed. This approach helps the engineer in best locating Unified Power Flow Controller (UPFC), the versatile FACTS' controller, in a multimachine power system to preserve voltage stability and reduce the line power losses under contingencies. The CS algorithm, which was first presented in the mid of 2009 as a novel optimization technique, is motivated by the compel behavior, clearly, brood parasitism of the cuckoos. Here, the ABC feature alters the levy flight behavior and, in consequence, the searching ability of the CS algorithm is enhanced. The test results, when examined on IEEE 30-bus benchmark system, reveal the notable going of the combined approach over the original CS method.