Intelligent distribution planning and control incorporating microgrids
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This paper proposes a comprehensive approach to the planning of distribution networks and the control of microgrids. Firstly, a Modified Discrete Particle Swarm Optimization (MDPSO) method is used to optimally plan a distribution system upgrade over a 20 year planning period. The optimization is conducted at different load levels according to the anticipated load duration curve and integrated over the system lifetime in order to minimize its total lifetime cost. Since the optimal solution contains Distributed Generators (DGs) to maximize reliability, the DG must be able to operate in islanded mode and this leads to the concept of microgrids. Thus the second part of the paper reviews some of the challenges of microgrid control in the presence of both inertial (rotating direct connected) and non-inertial (converter interfaced) DGs. More specifically enhanced control strategies based on frequency droop are proposed for DGs to improve the smooth synchronization and real power sharing minimizing transient oscillations in the microgrid. Simulation studies are presented to show the effectiveness of the control.
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Shahnia, Farhad; Chandrasensa, Ruwan; Rajakaruna, Sumedha; Ghosh, A. (2014)In order to minimize the number of load shedding in a Microgrid during autonomous operation, islanded neighbour microgrids can be interconnected if they are on a self-healing network and an extra generation capacity is ...
Shahnia, Farhad; Chandrasensa, Ruwan; Rajakaruna, Sumedha; Ghosh, Arindam (2013)This paper shows how multiple interconnected microgrids can operate in autonomous mode in a self-healing medium voltage network. This is possible if based on network self-healing capability, the neighbor microgrids are ...
Majumder, R.; Shahnia, Farhad; Ghosh, Arindam; Ledwich, G.; zare, F. (2009)In this paper, a new power sharing control method for a microgrid with several distributed generation units is proposed. The presence of both inertial and non-inertial sources with different power ratings, maximum power ...