基于模块化多电平换流器的柔性直流输电控制保护系统仿真测试研究

华中科技大学硕士学位论文AbstractVSC-HVDC is a hot topic in both academic research and industry,of which thecontrol and protection system lacks design and operating experience.A new methodbased on RTLAB platform is presented in this dissertation to test the Control andprotection System before operation.By the use of it,the research period is shortened,most functions of the HVDC Link are tested,therefore ensuring the safety and reliabilityfor parallel operation.The HVDC Link discussed here is based on modular multilevel converter (MMC-HVDC).Through the analysis of the basic principles of MMC-HVDC,the dissertationestablishes the mathematical model,presents the advantage and disadvantage of it andindicates its application.The dissertation gives a summary of the most common controland protection strategy of MMC-HVDC,specifically introduces a popular hierarchicalcontrol structure what separates the Control and Protection System into Stationcoordinated Controller(SCC),Pole Control and Protection(PCP)and Valve BasedController.The author believes the communication between stations will benefit forreliability and stability related to the cost under the condition of current device for powersystem.The dissertation introduces the RTLAB platform,mainly explains the use ofstate-space nodal method and the hardware,Intel CPU and FPGA,what makes RTLAB areal time platform.A contrastive analysis of the application on MMC-HVDC betweenRTLAB,PSCAD and RTDS is presented.According to main circuit of MMC-HVDC,the dissertation provides the parameterdesign method,and presents the realization in detail based on RTLAB Platform.By theuse of communication protocol Aurora,the testing system makes the rapidcommunication between the Valve Based Controller and the main circuit simulated inRTLAB possible.The system accomplishes the function performance test and thedynamic performance test for a real MMC-HVDC Link.The result is confirmedaccording to the result of site commission.Keywords:MMC-HVDC,RTLAB Platform,Control and Protection System,Simulationand Testing