| With the rapid development of the world’s science of technology, combined with environmental protection requirements, wind energy as a clean and renewable energy is more and more widely used and developed. Switched Reluctance Generator(SRG) has a simple structure, wide range of variable-speed operation, low-speed performance, etc.. Corresponding to a current source operation, it is easy to grid-connected operate.These features make SRG has broad application prospects and research value in wind power generation. In this paper, switched reluctance wind power generation system to grid-connected operate and its ripple reduction were studied.The detailed research works can be listed as follows:(1) The current utilization of wind power was summarized and the advantages of SRG for wind power generation was analyzed, then research status of grid-connected inverter technology for the wind power was summarized.(2) The structure and operation principle of the SRG are analyzed, on this basis, nonlinear mathematical model of SRG was established.And the structure and composition of SRG wind power generation systemgive was given, then it analyzed the principle of wind turbine and its operating characteristics, the further, the mathematical model and simulation model of of wind turbine were established.(3) Maximum wind power tracking(MPPT) control of machine side and grid-side inverter control were studied under the switched reluctance wind power generation system on AC grid.Based on the field current control perturbation method of current chopping mode,the MPPT was complied.And the grid-connection control based on the grid voltage oriented vector control(VOC)was proposed.The simulation model of switched reluctance wind power generation system on AC grid was built under the MATLAB simulation software and the simulation was analyzed.(4) In the study of SRG wind power generation system on DC grid, the grid-connected tactics based on Buck circuit current controlled was proposed. The simulation model of Buck circuit current controlled switched reluctance wind power generation system under MPPT on DC grid was built and the simulation was analyzed.(5) The reason of the machine side current ripple of the switched reluctance wind power generation system is analyzed, and the optimal control method of the output current is proposed, which is based on the closed-loop control of the average current of the bus and the online off angle adjustment to minimize bus current ripple. A simulation model of switched reluctance generator system based on bus current ripple minimization is established, and the simulation results are analyzed. |
