http://localhost:8081/jspui/handle/123456789/115 2025-07-02T07:27:31Z 2025-07-02T07:27:31Z Murali, Roshni http://localhost:8081/jspui/handle/123456789/17522 2025-07-01T12:58:38Z 2013-06-01T00:00:00Z

Title: PERFORMANCE EVALUATION OF DOUBLY FED INDUCTION GENERATOR Authors: Murali, Roshni Abstract: World-wide concern about environmental pollution and a possible energy crisis has led to increasing interest in technologies for generation of clean and renewable electrical energy. Among the various renewable energy sources, wind power is the most rapidly growing one. During the last decade, with the penetration of wind power into the electrical grid, there has been a fast growing demand for the application of Doubly Fed Induction Generator (DFIG) in electrical power systems owing to its numerous advantages over other generators in wind energy conversion systems. This report makes a study on doubly fed induction machine and wind turbines. A model of the DFIG based wind turbine connected to grid is developed in Matlab/Simulink environment. The topology utilising static scherbius drive scheme in the rotor is taken up in this work. The performance of the system is evaluated both under constant wind speed (ideal condition) and varying wind speed (practical scenario) condition when maximum power tracking feature is employed.

2013-06-01T00:00:00Z Kovvuru, Lavanya http://localhost:8081/jspui/handle/123456789/17520 2025-07-01T12:58:20Z 2013-06-01T00:00:00Z

Title: IMPLEMENTATION OF PV GRID CONNECTED INVERTER Authors: Kovvuru, Lavanya Abstract: This thesis presents a performance analysis of single-phase five-level inverter for grid connected photovoltaic (PV) system. Proposed PV system is a two stage multi-string inverter configuration with a novel PWM control scheme, in which six PV modules are cascaded together in parallel configuration and connected to a live-level inverter to produce output voltage in five levels. The first stage ensures maximum point tracking of a PV module through a dc-dc converters and second stage is for inversion purpose. Maximum power point tracker (Ml'Pl') is a simple dc-dc converter whose control is achieved through the tracking algorithms. So analysis of MPPI' under two distinct point of views: dc-dc converter and tracking algorithm is presented. 'l'he main function of a PV array is to suppiy active power to the grid and local loads connected to it. If the loads with reactive power requirement are connected to the grid, then how the inverter will fulfill this requirement without disturbing the grid is going to be studied in this thesis by adding reactive power control function. To emphasize the capability of an inverter, the test system is subjected to different loads: linear loads with only active power requirement and linear loads with both active and reactive power requirements and their simulation results in MATLAB/Simulink are presented. Same technique has been extended to the three phase grid connected PV system and their results are presented.

2013-06-01T00:00:00Z Sanodiya, Pradeep Kumar http://localhost:8081/jspui/handle/123456789/17518 2025-07-01T12:57:56Z 2013-06-01T00:00:00Z

Title: PERFORMANCE INVESTIGATION OF SHUNT ACTIVE POWER FILTER FOR THREE-PHASE FOUR WIRE SYSTEM Authors: Sanodiya, Pradeep Kumar Abstract: Now a days to achieve better performance, highly efficient operation and for compactness customers are seeing for the power electronic technologies. The use of the power electronic devices leads to reactive power problems; injection of harmonics in the 3P4W supply system causes the power quality problems. To maintain the quality of the power at the customer end is becoming difficult. Poor power quality leads to misoperation of the power system devices like relays, operation failure of the electronic devices and so many other problems. Thus it is required to come up with some techniques by which these problems can overcome. In this dissertation work to overcome power quality related problems in 3P4W system, shunt active filter performance evaluation with the use of Matlab Simulink for three different topologies was carried out. To control the shunt filter two control schemes were presented (reactive power theory and conventional control). The control circuits are implemented with the help of dSPACE (DS1104) DSP. The simulation of four legged topology, capacitor mid-point topology and three H-bridge topology has been done in Matlab/Simulink. Hardware results are verified with simulation results.

2013-06-01T00:00:00Z Singh, Dushyant Kumar http://localhost:8081/jspui/handle/123456789/17517 2025-07-01T12:57:46Z 2013-06-01T00:00:00Z

Title: MODELING AND SIMULATiON OF STANDALONE PERMANENT MAGNET SYNCHRONOUS GENERATOR Authors: Singh, Dushyant Kumar Abstract: At present time energy crisis is a severe problem. As the population increases energy consumption also increases proportionally. We know today that conventional energy resources are limited. So the more and more emphasis is on to find out an inexhaustible energy source which promises to meet our growing energy demands. Wind energy is one of options available to us, which is clean, renewable and produces no greenhouse gases. In many countries, there are remote communities where connection with the power grid is too expensive or impractical and diesel generators are often the source of electricity. Under such circumstances, a locally placed small-scale standalone distributed generation system can supply power to the customers. Autonomous wind power systems are among the most interesting and environment friendly technological solutions for the electrification of remote consumers. This dissertation report helps to understand the basics of wind energy conversion system. Then the Standalone Wind Energy Conversion System based on Permanent Magnet Synchronous Generator is modelled and the various benefits are enlisted. Before developing the wind energy conversion system one comparative analysis has been done for the generator side converter among uncontrolled rectifier, uncontrolled rectifier followed by boost converter and switched mode rectifier. This dissertation work oriented towards investigating the performance characteristics of variable speed wind energy conversion system. As the voltage and frequency of the generator output vary along the wind speed change, a switched mode rectifier is utilised to maintain constant dc link voltage. Finally techniques on how to extract maximum power from wind have been developed. Proposed system supplies power to - the load at constant voltage and frequency. It can also use for the unbalance load because load side controller is help to compensate the effect of the unbalance operation

2013-06-01T00:00:00Z