实测见真章 为“绿电”入网保驾护航——国网山东电科院完成整村分布式光伏涉网改造现场测试验证侧记

Core Viewpoint - The successful completion of the first village-wide distributed photovoltaic (PV) network safety enhancement project in China by State Grid Shandong Electric Power Company provides a replicable and promotable practical model to address safety challenges in distributed PV systems, supporting the stable operation of new power systems [1][2]. Group 1: Distributed Photovoltaic Development - Shandong's distributed PV installed capacity has exceeded 60 million kilowatts, accounting for nearly half of the province's renewable energy capacity, making it a crucial force in energy transition [2]. - Early deployed PV inverters pose a disconnection risk during grid fluctuations, highlighting their role as a weak link in grid operations [2]. Group 2: Technical Innovations - The challenge of evaluating the performance shortcomings of over a thousand types of PV inverters led to the development of a universal and economical modification plan [3]. - A comprehensive testing environment was established, conducting over 320 simulation experiments, leading to the creation of a classification system for inverter network performance based on hardware parameters [3][4]. Group 3: Testing and Validation - A two-step verification approach was implemented, combining laboratory tests with on-site validations to ensure the scientific and practical applicability of the classification system [5]. - The testing team successfully transformed a complex testing process into a standardized task, validating the classification system's effectiveness with the support of industry experts [5]. Group 4: On-Site Implementation - The on-site testing in Liujiabao Village involved 160 households with diverse PV installations, showcasing the project's adaptability to various conditions [6]. - The team conducted over 200 high and low voltage crossing tests, confirming the universal applicability and effectiveness of the technical solutions for multiple brands and models of distributed PV inverters [6]. Group 5: Future Outlook - The successful validation of the village-wide distributed PV network modification signifies the capability of State Grid Shandong Electric Power Research Institute to provide comprehensive technical support from theoretical innovation to large-scale engineering verification [7]. - The institute plans to continue focusing on the distributed PV sector, enhancing technical support for network performance modifications to ensure the safe and stable operation of new power systems [7].