Core Viewpoint - The successful operation of China's first "integrated wind-solar-fire-storage" transmission project marks a significant advancement in the country's high-voltage direct current (HVDC) technology, showcasing the development of intelligent protection systems for power grids [1][4]. Group 1: Historical Context and Development - In the 1970s to 1990s, over half of the stability issues in China's power grid were attributed to relay protection defects, with high-end protective equipment being largely imported and costly [2]. - Zheng Yuping, a key figure in the development of relay protection technology, has dedicated over 40 years to advancing this field, transitioning from reliance on foreign technology to achieving self-sufficiency and innovation [2][8]. Group 2: Technological Innovations - Zheng's team developed a high-sensitivity directional protection method for high-voltage lines, leading to the creation of complete protective devices for ultra-high voltage transmission lines, generating over 5 billion yuan in value [2][3]. - The team achieved a market share of over 60% in the large-capacity generator transformer protection market, with products exported to over 20 countries [3]. Group 3: Challenges and Solutions - The complexity of modern power grids presents new challenges for traditional protection technologies, necessitating innovative solutions to ensure safety and reliability [4][5]. - Zheng's team established a differential protection technology system to address the evolving characteristics of complex grid faults, significantly enhancing fault identification and response times [4][5]. Group 4: Future Directions - With the rise of new energy systems, there is a pressing need for updated relay protection technologies to adapt to changing fault characteristics [7]. - Zheng proposed a new relay protection principle based on time-domain equivalent models, aiming to create a system that does not rely on power source characteristics, which is currently being applied in various modern energy scenarios [7].
国家电网郑玉平：四十载匠心守卫电网安全
Xin Hua She·2025-06-19 00:38