3pm on June 2, 2021，The first phase of PowerX TALKS Graduate Academic Forum, hosted by the Academic Innovation Center of the School of Electrical Engineering。This forum invited Wei Mingjie, 2018 doctoral student of the School of Electrical Engineering，The theme of the speech is "High Disease Diagnosis Technology and Application of Furniture Network based on Broadband -based Synchronous Measurement"。Deputy Secretary of the Party Committee of the School of Electrical Engineering Song Sili attended the forum and delivered a speech，This forum is chaired by Zang Lindong。

This speech，Wei Mingjie mainly introduces from the background、System parameter monitoring and high resistance fault detection、High resistance fault selection and section positioning based on broadband synchronous signals、Summary and prospects:，Detailed introductions to his scientific research results in the diagnosis of high resistance failure。First，Wei Mingjie introduced that high resistance faults are generally caused by single -phase grounding faults with higher transition resistance in the medium -voltage distribution grid，and explain it in detail1996 IEEE PSRC in the current and transition resistance of various grounding media defined in the 12.5kv distribution network，Experimental verification by their research group，At the same time, he also introduced the two mainstream medium -voltage distribution grid structures of the world，and clarify the research scope of the diagnosis of high -resistance faults he made is in the three -phase and three -line system，Because its zero -order network can to a certain extent, it can achieve the isolation of the medium and low -voltage distribution network，significantly improves the sensitivity of high -resistance fault detection in the mid -voltage distribution network，At the same time, the two main contents of this speech are introduced at the same time: the characteristics of the characteristics of the failure and non -troubleshooting phase and its connection with the operating method of the grid can be excavated without misjudgment，The general rules of the space distribution of the signal in different grids of the grid can obtain the accuracy and migration of fault positioning。Next，Wei Mingjie shows in detail the summary of his past scientific research results. He shows his system parameter monitoring and high -resistance fault detection based on the synchronous number of system parameters、Knowledge of high -resistance fault selection and section positioning based on broadband synchronous signals，Through formula、Graphics、Delivery explanations in various ways，Explore the mechanism of changing the system's running state before and after the high resistance failure，Related the parameters of the measurement signal and the operating status of the system，It proposes to use the synchronous measurement system to run the parameters online monitoring method and flexibly track the high -resistance fault detection method of the system status; start from the theorem of orthogonality of the broadband sine signal，Display the general rules of space distribution under different operating methods after the high resistance failure after high resistance failure，Select three harmonic components that dominate the dominant in high resistance failure，It proposed three harmonic high -resistance fault selection and section positioning methods。

Free communication link，Students present asking questions on different questions，Including the study of the three harmonics in the broadband synchronous measurement in the topic and the three harmonic research in the speech content, and how master students should prepare for the dissertation，Wei Mingjie also explained one by one。

Then, Secretary Song Sili issued it to Wei MingjiePowerX TALKS Activity Memorial Certificate and speech，Song Sili mentioned，PowerX TALKS series activities adhering to the theme of "Thinking Light the Future"，It will play an important role in the academic ideological guidance of graduate school，I hope it can become the brand activity of the School of Electrical in the future，The way to hold is also more flexible，Can have greater coverage，attract more students to participate in it，At the same time, the theme of the activity can also be wider，Covering academics、Entertainment、Science and Technology Innovation and other aspects，Forms are more diverse，The college will also strongly support。

Finally, take a group photo of the teachers and students present with the guest of the speech, this issuePowerX TALKS Graduate Academic Ideological Forum successfully ended in the warm applause of teachers and students。

Introduction to the speaker:

Wei Mingjie, School of Electrical Engineering, Shandong University2018 PhD students，2013-2017 studied at Shandong University，Get bachelor's degree。I have won national scholarships，UHV Scholarship，Graduate Innovation and Entrepreneurship Entrepreneurship in Shandong University。Currently published a total of 11 SCI/EI journal papers，Among them, the international authoritative journal IEEE TRANS. Power Delivery and other SCI papers in the field of power system protection are published as the first author.，3 articles such as the Journal of China Electrical Engineering and Electric System Automation，Authorized invention patent 5 items，Participate in a national key research and development plan project。