TAILIEUCHUNG - Electrical Generation and Distribution Systems and Power Quality Disturbances Part 3

Tham khảo tài liệu 'electrical generation and distribution systems and power quality disturbances part 3', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Integration of Hybrid Distributed Generation Units in Power Grid 27 energy absorbed from then grid will be dissipated in the breaking resistance of the hybrid power plant and is actually wasted energy. If no breaking resistance is included in the hybrid generation unit the valley filling service can be provided only if the battery state of charge is low enough to enable the storage of all the active energy that is required to be absorbed from the grid. The considerations written above refers to the energy sizing of the renewable generation unit. The power or thermal sizing is calculated considering the maximum active power peak and the maximum reactive power peak that the hybrid generation unit will be required to supply to the grid and their contemporary probability. The maximum active power peak is presumably due to the peak shaving operation while the maximum reactive power peak is usually caused by the voltage regulation in case of a significant voltage amplitude reduction voltage dip . Plant configurations There are many different power plants configuration that can differ by the nature of the renewable sources by the type of the hybrid storage system and by the kind of converters used. The different hybrid power plants configuration are usually classed in function of the nature of the power bus AC bus at frequency line DC bus or high frequency AC bus . The main choice to be made regarding the hybrid plant topology as for islanded systems concern first of all the type common power sharing bus DC or AC bus and secondly the typology of the static converters dedicated to the sources and to the battery bank. Some of the aspects considered for the islanded system regarding the DC bus or the Ac bus consideration are still valid also for grid connected systems such as the consideration regarding the modularity and the overall costs. Some other considerations listed below should be modified and adapted to the grid connected hybrid power plants. Kind of loads and .

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