The International Conference on Power System and Energy Technology (ICPSET) has confirmed once again this year the enthusiasm and determination of students and young researchers to play a major role in the scientific progress. Since 2020, we have gathered together to discuss the most recent developments and achievements on power system and energy technology, and we firmly convince that sharing our expertise and experience is the foundation of research activity. The 2024 3rd International Conference on Power System and Energy Technology (ICPSET 2024) took place from July 5th to 7th, 2024 in Hangzhou, China, attracting more than 100 leading delegates worldwide. The format we chose is a formal meeting primarily aimed at graduate students and leading researchers, who were encouraged to present their work through oral or poster presentations that provide genuine engagement of the audience and cross-pollination of ideas. The main purposes of the conference were to create an international forum for researchers, both experimentalists and theorists, and foster fruitful collaborations across different branches of power system and energy technology. With the strong organizing team, committee member, the great number of excellent submission as well as the wide international fame, the ICPSET was held for the third time. The success of this year’s event was testified by an increased number of participants and institutions all around the world. This resulted in an extremely rich and interactive keynote speech, oral and poster session that covered several areas related to power system and energy technology. With the intent of broadening the contents and stimuli adopting academic communication, the keynote speech part was held. This choice reflects the growing importance of the activity performed by scientists and researchers as a way of increasing their expertise and developing soft skills. Included among the keynote speakers were Professor Qian Chen (Jiangsu University, China), Professor Qingshan She (Hangzhou Dianzi University, China), Professor Jingfeng Mao (Nantong University, China), Associate Professor Zafar Said (University of Sharjah, the United Arab Emirates), as well as Associate Professor Wentao Huang (Jiangnan University, China). They gave wonderful keynote speeches and shared their latest research results and insights through their research and experimental experiences and professional knowledge in the fields of power systems and energy technologies. This conference provided a high-level academic exchange platform for participants, promoted the exchange and collision of new ideas and technologies, and promoted the innovation and development of power systems and energy technologies as well as their affiliated industries and disciplines. In this volume, we collected the excellent contributions that have also been presented at the conference through oral or poster presentations, covering topics on Intelligent Protection and Substation Integrated Automation, Power System Real-Time Simulation System, Smart Grid, Renewable Energy, Energy Storage Technology, Energy Efficiency, Energy Conversion and Application, among others. Finally, we would like to thank all the keynote speakers, authors, reviewers, and everyone who contributed to the conference. We owe gratitude to all the committee members for providing necessary help and support throughout the conference. Special acknowledgements to the IOP Press-Journal of Physics: Conference Series for its help in making this volume published. The Committee of ICPSET 2024 List of Committee Member is available in this Pdf.