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Activity time ： 2019year6month18Sunday (Thursday) afternoon2：30

Tencent ConferenceIDNo.:209 399 323

Graduate guest： Hu Yujia Liang Zhixiang Li Tairan Liu Wentao

Commentary guest：Professor Ye Hua

Associate Professor Liu Hongshun

Host ：Ai Hongyu

Lecture content : Outstanding graduates, brothers and sisters will share their scientific research process and academic achievements based on the topic，And teach job hunting based on personal experience、Experiences and thoughts on entering higher education and studying abroad，Many aspects、Broaden everyone’s horizons from multiple angles，Better help everyone clarify their positioning，Establish your own goals，Lay the foundation for long-term development。

Introduction of graduate guests：

Liang Zhixiang:Power System Research Institute20Graduate，After graduation, he will work at the State Grid Jiangsu Electric Power Dispatching and Control Center。

Received first-class scholarship for postgraduate studies，Outstanding Graduate Student of Shandong University，Special Scholarship for Outstanding Postgraduate Students of Shandong University，UHV Grid Scholarship，Outstanding Student Cadres of Shandong University、Outstanding monitor of Shandong University。Projects participated in during the postgraduate period: State Grid Shandong Electric Power Company's science and technology project "Research on the development planning and security defense technology of the provincial-level large receiving end power grid to undertake the global energy Internet"；National Key R&D Project "Large Power Grid Integration Online Security Risk Prevention and Control and Intelligent Decision-making Technology"。The final title is: Research on the application of deep learning in early warning of wind power ramp-up events

Liu Wentao:Renewable Energy and Smart Grid Research Institute20Graduate，After graduation, I plan to continue my PhD studies at Aalborg University in Denmark。

Publish Area 2SCIA journal article,EIOne conference paper，Independently complete the construction of the laboratory hardware platform，Have experience in software and hardware design。The final title is: Analysis of start-up and stop process and control strategy research of modular multi-level converter。Analyze the application characteristics and control process of existing start-stop methods，Point out possible overcurrent problems during AC side startup，And proposes a constant power closed-loop start-stop control strategy based on direct control of bridge arm current，Ensure the stability and safety of the converter during the charging and discharging process through fast tracking of the bridge arm current。To further simplify the design of startup controller，Taking sub-module topology as the research object while retaining the current limiting resistor，Propose sub-module open-loop precharging strategy，Through regular sub-module switching operations，Quickly complete the precharge control of the inverter。

Hu Yujia:High Voltage and Insulation Technology Research Institute20Graduate，After graduation, I plan to go to Xi’an Jiaotong University to pursue a doctoral degree。2019yearReceived National Scholarship;Vice Chairman of the Graduate Student Union of School of Electrical Engineering, Shandong University，Outstanding Communist Youth League Member of Shandong University，Outstanding Graduate Student of Shandong University。Participated in the State Grid Corporation of China’s science and technology project—Research on key technologies for live detection and risk prevention of main equipment in distribution networks ，National Natural Science Foundation Project—Theoretical Research on the Interaction between Atmospheric Pressure Low-temperature Plasma and Cells。PostedSCITwo papers: "Molecular Dynamics Simulations of Membrane Properties Affected by Plasma ROS Based on the GROMOS Force Field.》;《Molecular Dynamics Simulations of the Permeation and Distribution of Plasma ROS in Aquaporin-1》.The final title is: Study on the microscopic mechanism of selective apoptosis of cancer cells by active particles in plasma。

Li Tairan:Power System Research Institute20Graduate，Worked at Jinan Power Supply Company of State Grid Shandong Electric Power Company after graduation。

2019yearReceived National Scholarship;Shandong University Outstanding Graduate Cadre Scholarship；Second Class Academic Scholarship for Outstanding Master Students of Shandong University；Served as a master2Class secretary,RatedOutstanding graduate student of Shandong University. Worked in journalsIEEE Transactions on Power SystemsPublished the paper "Time Integration-Based IGD Methods for Eigen-Analysis of Large Delayed Cyber-Physical Power System》.

The final title is: Stability analysis of time-delay power system based on numerical integral partial spectrum discretization。The paper proposes a series of time-delay power system eigenvalue analysis methods based on numerical integral partial spectrum discretization。These methods inherit the computational framework of the original spectral discretization method，Change the time-delay system model at the same time、Improve existing methods in many aspects such as discretizing matrix dimension reduction and eliminating redundant calculation links，A system designed to improve the spectral discretization method，Provide a more efficient and widely applicable time-delay power system eigenvalue analysis method。