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Harmony Search Algorithm-Based Controller Parameters Optimization for a Distributed-Generation System

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PROJECT TITLE :

Harmony Search Algorithm-Based Controller Parameters Optimization for a Distributed-Generation System

ABSTRACT:

This paper presents the employment of a harmony search algorithm (HSA) to optimally design the proportional-integral (PI) controllers of a grid-aspect voltage supply cascaded converter with 2 extra loops for smooth transition of islanding and resynchronization operations in a distributed-generation (DG) system. The primary loop is the frequency-management loop which is superimposed on the real power setpoint of the cascaded controller of the voltage-source converter to minimize the frequency variation during the transition from the grid mode to islanding mode. The second loop is that the resynchronization loop that reduces the phase shift of the ac voltages of the DG with the utility grid ac voltages during islanding operation leading to a successful grid reconnection event. The response surface methodology (RSM) is used to build the mathematical model of the system dynamic responses in terms of PI controllers' parameters. The effectiveness of the proposed PI control scheme optimized by the HSA is then compared with that optimized by both genetic algorithm and standard generalized reduced gradient techniques. The HSA code is built using the MATLAB software program. The validity of the proposed system is verified by the simulation results that are performed using PSCAD/EMTDC.


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Harmony Search Algorithm-Based Controller Parameters Optimization for a Distributed-Generation System - 4.9 out of 5 based on 18 votes

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