枣庄供电首次在220千伏变电站投用35千伏组合电器

Core Viewpoint - The successful upgrade of the 35 kV switchgear at the 220 kV Qingtan Substation marks a significant advancement in the reliability and safety of the Zaozhuang power grid, addressing insulation issues caused by environmental factors [1][3]. Group 1: Infrastructure Upgrade - The upgrade involved the removal of 20 old switchgear units and 2 old transformers, with the installation of 21 new gas-insulated switchgear units and 2 new transformers [5]. - The project included the excavation of 220 meters of primary and secondary cable trenches and the installation of 25 new protection and damping devices [5]. Group 2: Operational Impact - The Qingtan Substation, which has been operational for 27 years, plays a crucial role in supplying electricity for agricultural and industrial production in Yicheng District and Taierzhuang District, with an average annual load of approximately 110,000 kW and a peak load of 190,000 kW [1]. - The introduction of the 35 kV gas-insulated switchgear significantly enhances the reliability of power supply for surrounding enterprises and residents, including connections to Fengyuan Zhongsheng Paper Mill and Wangmapu Photovoltaic Power Station [5]. Group 3: Project Management and Execution - The construction team faced challenges such as a long timeline, multiple phases, high risks, lack of experience, and heavy rainfall, necessitating thorough planning and execution [5]. - Daily progress meetings were held to discuss work plans and implement corrective measures, ensuring precise management of critical project milestones [5].