iosr-JEEE   Volume-11 ~ Issue-1 ~ Jan-Feb 2016

Abstract: This paper proposes a simulation of modeling and implementation of PI controller for a 3 phase to 3 phase power conversion using matrix converter. Closed loop PI controller is used to achieve real time control for 3 phase to 3 phase matrix converter. The entire matrix converter circuits are developed by Mathematical model so as to achieve less computational time and performances of the PI controller are evaluated using MATLAB/SIMULINK for RL Load. The mathematical expressions of the three phase matrix converter are implemented by using simulink block set. The duty cycles of the matrix converter bidirectional switches are calculated using modified venturini algorithm for maximum voltage transfer ratio.
Key Words: 3 phase to 3 phase converter, AC to AC conversion, closed loop Matrix converter, Matrix converter, PI Controller.

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Abstract: Distributionsystemis apower systemthat servesto transmitanddistributeelectrical energy toloadcentersor consumers. The problem facedishow to supply thedistributionnetworkwith agood quality ofpowerat the present timeandinthe future. A goodanalysis ofthe distribution ofurgently neededqualityin the distribution system. Power flow studies are very useful for planning and designing the expansion of electric power systems and is also used to determine the operating conditions of a system that meets the economic and technical requirements. There are several methods used to solving the power flow analysis include: 1). Technique Topology, 2). Novel Method, and 3). Newton Raphson Method. Comparison of the three methods used in this study are expected to provide a solution that has a speed in the calculation process and low memory.Comparison ofspeed andmemory requiredforthe abovethree methodsshowedthat thenovelmethodsprovidea fasterexecution timethanthe twoother methods.In the process ofcomputation timeis0.009749sobtainedforthe novelmethod. As for thememoryrequired is131,226bytes.

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Abstract: Automatic Generation Control (AGC) plays very important role in power system automation, design, operation and stability. In this paper, we propose the hybrid Particle Swarm Optimization and Genetic Algorithm (hPSO-GA) method to obtain the Proportional-Integral-Derivate (PID) controller parameters for AGC of four-area interconnected hydro thermal power system. The hydro and thermal areas are comprised with an electric governor and reheat turbine, respectively. Also, 1% step load perturbation has been considered occurring in any individual area. This power system with the proposed approach is simulated in MATLAB/SIMULINK and the responses of frequency and tie-line power deviation for each area compared with PSO and GA. The simulation results show that proposed hPSO-GA based PID controller achieves better responses than PSO and GA based PID controllers.

Keywords: Automatic Generation Control (AGC), Genetic Algorithm (GA), hPSO-GA, Multi-area power system, Particle Swarm Optimization (PSO)

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