面向新一代电网需求的电力电子技术与装备

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]