Control design of new eco friendly microgrid based on Wind/Diesel/Battery driven variable speed generators
In this paper, the control design of new Eco friendly microgrid based on Wind/Diesel/Battery is investigated. Wind turbine (WT) driven variable speed permanent magnet brushless DC generator (PMBLDCG) is tied to the DC bus through three phase diode bridge rectifier and a DC/DC boost converter. Perturbation and observation technique (P&O) is used to achieve maximum power point tracking (MPPT) from WT without rotor speed sensing. Diesel engine (DE) driven variable speed permanent magnet synchronous generator (PMSG) is connected to the DC bus through three phase diode bridge rectifier and DC/DC boost converter. It is controlled to operate according to the load power demand and the state of charge of battery (SOC% The measured power at the DC bus is used to estimate the reference rotor speed by using reel power speed curve. A neutral point 3 phase 4 wire inverter topology is considered as interfacing power converter. To regulate the system frequency and AC voltage at the point of common coupling (PCC) control strategy based on decomposition in symmetrical components of the load voltages and currents is developed. To protect battery energy storage system from overcharging, dump load is used. Performance of the proposed system and its developed control strategies, are tested under presence of severe conditions using Matlab/Simulink.
2016 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES)