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DEVELOPMENT OF A GRID-CONNECTEDED WIND/PV/BESS HYBRID DISTRIBUTED GENERATION SYSTEM

DEVELOPMENT OF A GRID-CONNECTEDED WIND/PV/BESS HYBRID DISTRIBUTED GENERATION SYSTEM,Jinhong JEON,Seulki KIM,Changhee CHO,Jongbo AHN

DEVELOPMENT OF A GRID-CONNECTEDED WIND/PV/BESS HYBRID DISTRIBUTED GENERATION SYSTEM  
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A grid-connected hybrid distributed generation system, composed of PV(photovoltaic) array, wind turbine and battery, is proposed for various power transfer functions to the distribution network. The proposed system has several operation modes which are normal operation, power dispatching, and power averaging, according to coordinate control of the BESS(Battery Energy Storage System) and grid inverter. PV array and wind turbine are individually controlled to operate at the maximum power point for the most use of renewable energy. The BESS operates as an energy buffer to flexibly shift the generation from the renewable energy sources without excessively frequent shifts between battery charging and discharging. A grid interface inverter regulates the generated power injection into the grid. Developed prototype system design and experimental results are presented to demonstrate the performance and to validate the proposed system during its operation modes. several operation modes which are normal operation, power dispatching and power averaging. The wind and solar systems are regulated to obtain the maximum energy from given wind and solar conditions for efficient operation. The battery storage system is utilized to smooth the output fluctuation of the entire hybrid system. Energy control of the entire system and energy flow between systems and grid are based on power electronic interface. Experimental test results present the dynamic control performance of the proposed hybrid generation system and also demonstrate the feasibility of output averaging with a battery storage system at the hybrid generation system. Figure 1 presents a configuration of the proposed grid-connected hybrid generation system.
Published in 2007.
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