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Study Of Direct-driven Wind Power System Connected To Power Grid By Battery Energy Storage System

Posted on:2016-09-29Degree:MasterType:Thesis
Country:ChinaCandidate:X S XuFull Text:PDF
GTID:2272330476453226Subject:Electrical engineering
Abstract/Summary:PDF Full Text Request
As one of the renewable resources of which is clean, safe and huge,wind energy has drawn more and more attention from many countries.But due to the ever-changing speed of wind, the wind power output is normally fluctuant. As the scale of wind turbine connected to power grid growing larger and larger, to ensure that large-scale wind power will not have a significant impact on the safe operation of the power grid is particularly important. This paper selects direct-driven permanent magnet wind power generation system as study project. Lithium-ion battery energy storage system is added to improve the power quality of parallel-operated wind power on power systemFirstly,the control strategy of dual PWM converter in the direct-driven permanent magnet wind power system are studied.The direct-driven permanent magnet wind power simulation model is built.The simulation results show that the model and dual PWM converter control strategy are correct.Then,this paper analyzes the working principle of lithium-ion battery. The simulation model of lithium-ion battery is built to show its excellent charge and discharge characteristics.Lastly,the control strategy of bi-directional DC/DC converter is developed and the simulation model of direct-drive wind power system by adding BESS at the DC-side is established. The simulation results show that the power quality of parallel-operated wind power on power system is improved effectively.
Keywords/Search Tags:dual PWM converter, direct-drive permanent magnet wind power generation system, battery energy storage system, bi-directional DC/DC converter, power quality
PDF Full Text Request
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