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Archana T.C.,Government Engg College Thrissur | Reji P.,Government Engg College
Proceedings of 2015 IEEE International Conference on Power, Instrumentation, Control and Computing, PICC 2015 | Year: 2015

In this paper a new control algorithm for self-supported Dynamic Voltage Restorer (DVR) is analysed. DVR is used to mitigate the power quality problems in terminal voltage like voltage sag, swell, harmonics etc. Here two PI (Proportional Integrator) controllers are used for regulating the DC bus voltage and the load voltage. The focus of this paper is to reduce the active power injected by DVR. Synchronous Rotating Frame (SRF) theory is used to extract the fundamentals of terminal voltage and reference voltage is genereted. The error between sensed load voltage and reference load voltage is used to generate the control signal for the DVR. The compensation of voltage sag, swell, harmonics is evaluated using the Self-supported DVR. The DVR has been modelled using MATLAB software with its Simulink and Sim-power system (SPS) block set tool boxes. © 2015 IEEE.


Raj G.S.,Government Engg College Thrissur | Rathi K.,Government Engg College Thrissur
Proceedings of 2015 IEEE International Conference on Power, Instrumentation, Control and Computing, PICC 2015 | Year: 2015

Power quality deterioration due to the increased use of power electronic switching devices has become a major problem faced by electrical engineers. Various power conditioning devices such as FACTS devices are developed for power quality improvement. Among them Shunt Active Power Filter (SAPF) is used for harmonic current compensation. SAPF supplies the reactive power required by the nonlinear load and maintains the power quality at source side. Performance of SAPF is at its best during ideal grid voltages. When the grid voltage is distorted with harmonics the THD reduction using SAPF is poor. In this paper performance of a p-q theory based SAPF is analyzed. Then a new improved control with p-q theory is used to improve the performance of SAPF during non ideal grid voltage conditions and the results are compared. © 2015 IEEE.


John I.,Government Engg College Thrissur | Jayanand B.,Government Engg College Thrissur
Proceedings of 2015 IEEE International Conference on Power, Instrumentation, Control and Computing, PICC 2015 | Year: 2015

Renewable energy systems become more present in the energy market and wind power has already proven it's potential. The offshore wind farms have also been continuing its growth rapidly due to much better wind conditions like onshore wind farms. The studied system here is a variable speed wind generation system based on Doubly Fed Induction Generator (DFIG). In this topology, stator side converter and rotor side converter is used to implement the DFIG control to achieve wind power conversion. Here, a maximum power control strategy is incorporated with the DFIG, whereby the produced power serves as the active power reference for the DFIG. Stator flux oriented vector control is applied to decouple the control of active and reactive power generated by the DFIG based wind turbine. A DC/DC boost converter is used for DFIG system to DC grid connection. This system represents transferring offshore wind power to the terrestrial ac grid through the High Voltage DC (HVDC) network. The details of the control strategy and system simulation results in Simulink are presented in the paper. © 2015 IEEE.


Prasad V.,Government Engg College Thrissur
Proceedings of 2015 IEEE International Conference on Power, Instrumentation, Control and Computing, PICC 2015 | Year: 2015

Asmall scale power grid combining various distributed energy resources to form a whole system that can operate independently or in conjunction with the main grid is considered. Proposed model is a grid connected hybrid system consisting of photovoltaic (PV) cells and fuel cells. Dynamic Voltage Restorer (DVR) is a device used to protect the system against sudden changes in voltage. Voltage sag/swell introduced in the system can be compensated using DVR as it injects required amount of compensating voltage. Models for each component are developed and combined to form the hybrid system using MATLAB/Simulink and waveforms are studied. Then control in voltage is analysed using proposed DVR control strategy. Proposals are validated through simulation studies using MATLAB. © 2015 IEEE.


Indu P.S.,Government Engg College Thrissur | Jayan M.V.,Government Engg College
Proceedings of 2015 IEEE International Conference on Power, Instrumentation, Control and Computing, PICC 2015 | Year: 2015

Super conducting magnetic energy storage (SMES) may improve the Frequency stability of a system, because of its fast response time in charging and discharging energy. This paper proposed the modelling and control of a hybrid solar photo voltaic, wind energy, Diesel-Engine Generator (DEG) and Superconducting Magnetic Energy Storage systems connected to an isolated power system. Due to random variations of wind speed, output power of wind generator fluctuates randomly. Also solar irradiance and temperature variation causes the variation of solar PV output power. This causes fluctuations of power system frequency and thus affects the stability of the system. Due to the intermittent nature of power output from renewable sources, they are integrated along with different energy storage systems. In this project SMES is proposed for minimization of frequency fluctuations of hybrid system. The control scheme of SMES is based on a sinusoidal pulse width-modulation voltage-source converter and a two-quadrant dc-dc chopper using an insulated-gate bipolar transistor. This project analyses the effect of superconducting magnetic energy storage (SMES) to improve the stability of an isolated hybrid system under varying atmospheric conditions. Simulation results indicate that SMES system can contribute to frequency stability when supply demand imbalance occurs. © 2015 IEEE.


Mohan S.,Government Engg College Thrissur | Jose Sebastian T.K.,Government Engg College Thrissur | Gopinath A.,CECG | Jaya B.,CECG | Namboothiripad M.N.,CECG
Proceedings of the 2015 IEEE International Conference on Power and Advanced Control Engineering, ICPACE 2015 | Year: 2015

The paper proposes an open end winding PMSM based electromechanical actuator for altitude control through Thrust Vector Control. The open end winding configuration has the inherent advantage of applying the voltage directly to the phase thus enabling reduced voltage operation. The paper presents the modeling of the Open end winding PMSM and its drive. The closed loop position control is also modeled to validate the performance of the proposed scheme. The modeling and the simulation study is carried out in MATLAB/SIMULINK. The performance of the proposed system is evaluated through experiments and results are presented. © 2015 IEEE.

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