Implementation of Wind Turbine Generation System Based on Full-Bridge Converter

• Main Authors: Bin-Hao Lin, 林稟豪
• Other Authors: Sheng-Kuan Wang
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/00488740139683907271

碩士 === 明志科技大學 === 電機工程系碩士班 === 104 === A grid-connected wind-turbine generation (WG) system of three-phase 220V/60Hz 2kW is implemented with TI TMS320F28335 DSP in this thesis. This system includes maximum power point tracking (MPPT), software phase locked loop (SPLL) of decoupled double synchronous reference frame (DDSRF), power controller, and islanding detection system. The various maximum output powers of WG corresponds to various wind speeds. The MPPT of dual alternating gain perturb and observe method is used in this thesis, which can quickly track MPPT and stablely output maximum power comparison with the incremental conductance method. The traditional SRF-PLL is replaced by DDSRF-PLL for decreasing the transient response time for detecting the ratio of change of frequency at PCC. The power controller of the system consists of the calculation of the LCL voltage dropping compensation, power curve fitting of three degree in two variable equation, and the calculation of the harmonic compensation for improving the power quality, the accuracy of output power, and the transient response time. The islanding detection technology of passive ROCOF method combined with the active reactive power variation method is used in this study. The used SPLL and power controller in the thesis can reduce the transient response times of islanding detection method, which has been proved in this thesis. In the hardware, the output three-phase voltages of the WG are converted to DC after rectifiing and filter, then the DC voltage magnitude is regulated by the full-bridge converter. The regulated DC voltage is applied to the terminal of three-phase inverter, the inverter outputs the three-phase AC voltage for the grid-connected. The experimental results shows the efficiency of the system about 82.56%, and the islanding detection method in this thesis can accurately detect the islanding event in the NDZ of ROCOF and the tripping time of breaker is in accordance with the criterion of IEEE 1547.