The colloquium of the Center for Intelligent Power and Energy Systems (CiPES) was held on Mar 19, 2021. This is a monthly event where we invite students and experts in the area of power and energy to give presentations about their research.

Today the presenter is Mr. Dian Lu from PSPAL. He gave a talk on his research: "Noniterative Phasor Domain Parameter-Free Fault Location Method on Untransposed Lines". After the presentation, the audience discussed with the presenter about the details of his research.

Dian Lu received the Bachelor degree of Electrical Engineering and Automation from Huazhong University of Science and Technology, Wuhan, China, in 2017. He is presently a graduate student in Power System Protection and Automation Laboratory (PSPAL), SIST. His research interests include phasor domain protection and fault location methods on transmission lines.

The abstract of this talk is as follows:

Reliable operation of transmission lines is particularly vital to transmit power over long distances in modern power systems. Faults may sometimes occur on the transmission lines. Accurate fault location technology shortens the time for utility crews to find the location of fault and speeds up the electricity recovery process. As the most widely adopted fault location methods in practice, the traditional fundamental frequency phasor based methods usually require known and accurate transmission line parameters. However, the line parameters may not be accurate in the utility dataset, or could even fluctuate due to the weather and loading conditions. To overcome this limitation, the parameter-free fundamental frequency phasor based fault location methods are studied in recent years. This talk will mainly introduce the existing parameter-free fault location methods as well as the proposed parameter-free fault location methods with emphasize on noniterative solutions for untransposed transmission lines. Instead of solving all the parameters, two key variables inside the parameter matrices are extracted. Afterwards, the fault location is obtained accurately by analytically solving a polynomial equation, independent fault types, fault impedances and fault locations.