Investment Rating - The report does not explicitly state an investment rating for the industry Core Insights - The report emphasizes the importance of power electronics technology and equipment in meeting the demands of the new generation power grid, which is expected to integrate a significant share of renewable energy sources by 2030, aiming for non-fossil energy to account for approximately 20% of primary energy consumption in China [4][6] - The new generation power grid is characterized by the integration of distributed renewable energy sources, smart energy management systems, and advanced power electronics devices, which enhance the efficiency and reliability of energy distribution [11][90] Summary by Sections Background and Significance - The new generation power grid is projected to evolve into an "energy internet," focusing on interconnectivity and the integration of distributed renewable energy sources [11] - Power electronics transformers are identified as essential components, providing functionalities such as voltage transformation, electrical isolation, and energy transmission, while also enabling reactive power compensation and harmonic mitigation [14][19] Challenges and Opportunities - The report discusses the challenges posed by the complexity of modular multilevel converters and the need for innovative topologies to address issues such as electromagnetic transient analysis and control complexity [28][31] - It highlights the dual development direction of semiconductor power devices, focusing on increasing power and voltage ratings while also enabling large capacity applications through combinations of smaller devices [31] Modeling and Simulation - The design and operation of power electronics transformers present significant challenges for modeling and simulation due to their complex structures and diverse functionalities [41] - The report introduces a new discrete state event-driven (DSED) simulation method that enhances simulation speed and accuracy, addressing the limitations of traditional simulation techniques [45][59] Applications and Demonstrations - The report outlines the involvement in national key research and development programs focused on critical technologies and core equipment for hybrid AC/DC distributed renewable energy systems [81][82] - It details the development of multifunctional power electronics transformers with multiple ports and configurations, enhancing system efficiency and reliability [89][90] Development and Outlook - The report anticipates a transformation in power electronics technology, moving towards a new generation that incorporates non-ideal switch characteristics and electromagnetic energy pulse control [103] - It emphasizes the need for efficient modeling and simulation methods to support the development of advanced power electronics devices and systems, ultimately facilitating the growth of distributed generation and microgrid technologies [104]

Core Points - Zhao Zhangming, a renowned expert in power electronics and electrical engineering, passed away on September 3, 2025, at the age of 66 [1][5]. Group 1: Academic and Professional Background - Zhao was born in February 1959 in Shaoyang, Hunan Province, and obtained his bachelor's and master's degrees from Hunan University in 1982 and 1985, respectively, followed by a PhD from Tsinghua University in 1991 [3]. - He served as a professor at Tsinghua University, where he held positions such as Deputy Director of the Department of Electrical Engineering and Vice Director of the National Key Laboratory for Safety Control and Simulation of Power Systems and Large Power Generation Equipment [3]. Group 2: Contributions and Achievements - Zhao was the editor-in-chief of the "Chinese Journal of Electrical Engineering" and held various leadership roles in professional organizations, including the IEEE Power Electronics Society [4]. - He made significant contributions to the field of power electronics, particularly in large-capacity power electronics, renewable energy photovoltaic generation, and integrated systems [4]. - Zhao led the first major project in power electronics funded by the National Natural Science Foundation and developed several key technologies, including medium-voltage frequency converters and photovoltaic grid-connected converters [4][5]. Group 3: Awards and Publications - He received multiple prestigious awards, including three first prizes for scientific achievements from the Ministry of Education and three first prizes from the China Electrotechnical Society [5]. - Zhao published over 600 academic papers, authored nine scientific books, and held more than 100 invention patents and 30 software copyrights [5]. Group 4: Industry Impact - Zhao served as an independent director for listed companies such as Huichuan Technology and Tonghe Technology, influencing the industry through his expertise [5].