November 22, 2020 19: 00-22: 00，Global Energy Internet University Alliance No. 4 Yunsha Dragon and the 14th Youth Yun Salon of the China Electricity Technology Society "Large Power Grid Operation and Control" -The Senior Scholars Lecture Hall was successfully held。This Yun Salon is co -sponsored by the Global Energy Internet University Alliance and the China Electrician Technology Society，The Electric Working Committee of the China Electrician Society of Electricity Technology and the Power System and Comprehensive Energy Team、IEEE PES Youth Working Committee and Shandong University jointly organized。Associate Researcher He Dongxin of the School of Electrical Engineering, Shandong University as the conference organizer。Through the online report and discussion of the Tencent Conference、Forms of the combination of WeChat group interaction and China Electricity Technology Society Activity Platform Simultaneous Live Live，This event report is rich and fulfilling，The atmosphere is warm，Gettles to success.

The opening of the meeting was chaired by Professor Ma Jing of North China University of Electric Power，Secretary -General Han Yi of China Electrician Technology Society、Executive Deputy Dean of Zhang Hengxu, School of Electrical Engineering, Shandong University, respectively opened up。

The special invitation report session invited 4 well -known scholars in related research fields to make a wonderful academic report on the control and protection technology of the power grid control and protection technology around high ratio.。Associate Professor Shi Xitai, Shandong University hosted the special reporting link of this event。

Professor Song Guobing from the Department of Electric Engineering and Electricity Engineering of Xi'an Jiaotong University made the title"Report on Fault Analysis of DC Hybrid Grid and Relay Protection"。Detailed interpretation of the control links of the DC Flower Network、Reverse power supply、FACTS, etc. on the protection of relay protection，Use vivid cases to analyze the challenges facing the current relay protection in a simple case，An in -depth analysis of several key issues，I got a series of important conclusions。

Challenges and future development trends for the stability of the power system，The deputy general manager of the Stable Control Technology Branch of Guodian Nanrui Grid Li Wei, a researcher -level senior manager, conductedReport on the title of "my country's Power System Stability and Failure Defense Thinking"。The effect of large -scale renewable energy access on the stable characteristics of the power grid，Elapse the expansion ideas of the three -way defense system of my country's power grid security defense system，Based on the specific engineering cases, several development directions for the stable control technology of the power grid。

Professor Xin Huanhai, director of the Department of Electrical Engineering, Zhejiang University, shared the title"New Energy Power System Broadly Short -circuit ratio" report。In the report, high -proportion of renewable energy is connected to the power grid and low inertia、Low and short circuit ratio、Low -key frequency ability and other "three low problems"，Detailed general short circuit ratio definition and effect of different grid forms，Explanation of the calculation process of the short -circuit ratio ratio of complex power grids，and introduced its specific application scenario。

Executive Deputy Dean of Zhang Hengxu, School of Electrical Engineering, Shandong University, focuses on"High -proportion of renewable energy grid frequency technology system"，Discussion of high -proportion of renewable energy access to the signal form of the grid、Fault form、Stable form、The influence of the control form，Explained the role of frequency control in various lines of defense、Coordinated control methods and new control methods，Discuss the derivative direction of frequency control and several deep problems。

In the guest interview link，The interview link hosted by Professor Zhang Hengxu of the School of Electrical Engineering of Shandong University。Professor Song Guobing starts from Xi'an Jiaotong University relay protection majors training requirements and training plans，Emphasized the importance of basic knowledge and scientific literacy; Dr. Li Wei set off from the needs of corporate talents and the characteristics of new employees，Summarizing solid professional knowledge and comprehensive ability is the most important wealth in the future career of young students; Professor Xin Huanhai combined with personal growth experience，I published in -depth opinions on the professional road planning and scientific research capabilities of young scholars。Dear experts also patiently on the professional and technical issues raised by the audience、Detailed answer，Direction of in -depth research for the majority of young scholars。Last，Professor Li Yong of Hunan University made a closing speech。

Global Energy Internet University Alliance Cloud Salon aims to communicate with each other by promoting each unit，Actively promote the work of the university alliance。Scientific research around Energy Internet、Topics such as talent training，Salon activities will be held at irregular，mainly based on the report and communication of experts and scholars，and invite senior scholars in the alliance colleges to participate in the review。Take"Senior Expert Lecture Hall" form，Invite authoritative experts of this subject and related disciplines to give lectures，Focus on academic hotspots，The growth of young scholars、Related issues in the process of Chengcai，Guide for young scholars。