Power Dispatch for an Input-Parallel and Output-Series-Parallel DC/DC Converter by Particle Swarm Algorithm

• Main Authors: Sian-Cyuan Lin, 林憲詮
• Other Authors: Chung-Ming Young
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/27799771565169359274

碩士 === 國立臺灣科技大學 === 電機工程系 === 103 === The subject of this thesis is to design and implement a dc/dc converter scheme for wind turbine generation system. The proposed structure consists of three phase-shift H-bridge converters and series parallel switching circuit.The input ports of the three H-bridges are paralleled directly while the output ports can be parallel and/or series through a switching mechanism which provides nine different configurations of the output ports.When the input voltage and the power provided by the wind turbine has been changed, this flexible system configuration enables the converter at low cut-voltage series for high voltage gain. When the wind turbine power rises, the converter connected in parallel to share the load current.Based on the above concepts developed two control strategies.One is based on the each converter specifications as the switching condition.When the input conditions change, using the appropriate converter output, is the load deployment strategy.Another is based on the each converter efficiency as a switching condition.When the input conditions are fulfilled, all the converter output in parallel, with optimized power allocation to make the system operate at maximum efficiency point, is the efficiency allocation strategy. The efficiencies of the individual H-bridge are measured and particle swarm method is applied to determine the optimum power dispatch. Also by the perturbation and observation method of load disturbance MPPT strategic partnership to make the proposed converter can be obtained over the entire operating range of the system more efficient.Finally, this thesis established a 5kW prototype with using the digital signal processor (DSP TMS320F28069) as the digital controller.Both simulation and experimental results demonstrate the validity of the proposed converter.