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This paper presents a real-time coordinated control of the hybrid ac/dc microgrids involving energy storage and pulsed loads. Grid-isolated hybrid microgrid applications require special considerations due to the intermittent generation, online energy storage control, and pulsed loads. In this study, we introduce a comprehensive frequency and voltage control scheme for a hybrid ac/dc microgrid consisting...
This work is associated with the renewable energy based microgrid for a standalone operation. The places where the renewable energy sources such as wind, solar, hydro etc. are in abundance can be used to generate electricity by developing microgrid (MG) such as wind- hydro MG. A synchronous reluctance generator (SyRG) is used as a constant speed hydro turbine and a permanent magnet brushless DC generator...
A part of an electric power system can operate as a standalone system without any connection to the main grid. Such autonomous systems include dedicated power systems for rural areas, moveable military bases and facilities requiring premium power quality. For the proper calculation and control operation of autonomous generation systems, the dynamics of the power sources and the loads must be properly...
This paper deals with the voltage and frequency control of an autonomous induction generator (IG). In order to do that, a voltage source inverter (VSI) with a dump load (DL) circuit on its DC side is employed. The IG frequency is controlled by keeping constant the VSI synchronous frequency. For the IG voltage regulation two cascaded regulators are used, which have as reference the line voltage and...
This paper develops, builds and tests a hybrid system made up of a fuel cell stack and a battery bank. The hybrid system has been built to supply DC and AC outputs. Voltage levels established on electrical interconnection points are achieved with several power conditioning stages controlled by pulse width modulation (PWM) and gain scheduling techniques. This work means a contribution to few works...
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