开工仪式前，吴庆文一行走访调研了吴江变压器有限公司，详细了解关键技术攻关、产品开发应用 等情况。 吴江变压器有限公司董事长沈向东，市政府秘书长徐本，吴江区主要负责同志参加。 昨天（1月18日），吴变电气设备有限公司特高压GIS数字化智能工厂项目开工仪式举行，项目总 投资约40亿元，一期建成达产后预计新增年产值40亿元。市委副书记、市长吴庆文出席并为项目奠基。 吴江变压器有限公司是深耕输变电设备制造领域的国家级专精特新"小巨人"企业，其制造的核心电 力装备广泛应用于国内特高压输电工程、城市电网改造、新能源电站等场景，自主研发的16项新产品技 术性能达到国际领先水平，吴变电气设备有限公司为其全资子公司。此次开工建设的特高压GIS数字化 智能工厂项目为省重大项目，总投资约40亿元，一期投资15亿元，占地面积107.45亩，将生产高压、超 高压、特高压全电压等级的GIS（气体绝缘开关设备）及GIL（气体绝缘金属封闭输电线路）产品，其 中1100kV特高压GIS产品代表国内最高技术水平。一期建成达产后预计新增年度产值40亿元，新增年度 税收超1亿元。 ...

Investment Rating - The report maintains a "Positive" investment rating for the GIL industry [5]. Core Viewpoints - GIL (Gas-Insulated Metal-Enclosed Transmission Line) is a relatively new transmission line technology that offers significant advantages such as high transmission capacity, ease of maintenance, long service life, and high safety [15][22]. - The GIL industry is expected to see increased adoption in specific geographical environments and urban projects, particularly for voltage levels of 500KV and above, as well as 220KV for urban applications [31]. - The report highlights that GIL technology is currently characterized by high unit prices and considerable profitability, with a projected unit price of approximately 35,000/m and a gross margin of 49.9% for 2024 [49]. Summary by Sections 1. What is GIL? - GIL is defined as a transmission line technology that uses gas as an insulating medium and encloses conductors within a metal shell, distinguishing it from overhead lines and cables [19]. - GIL has advantages over traditional transmission methods, including lower land use, higher safety, and reduced line losses [22]. 2. GIL Industry Trends - GIL has been applied in various domestic projects across a wide voltage range from 220KV to 1000KV, with notable projects including the Su Tong GIL corridor and the Wuxi urban power grid [28][29]. - Future GIL applications are expected to focus on high-voltage direct current (HVDC) systems and urban underground transmission projects, which can save land resources [31]. - The report indicates that GIL technology is a key choice for future transmission projects, including the Gansu-Zhejiang UHVDC and Zhejiang UHVAC ring network [31]. 3. Competitive Companies in GIL - Pinggao Electric is identified as a leading company in the GIL sector, having made significant advancements and investments in GIL technology since 2015 [60][62]. - China West Electric, through its subsidiaries, has strengthened its GIL competitiveness, participating in various significant projects and acquiring control of Hengchi Electric [63][65]. - Other companies such as Siyi Electric and Ankao Zhidian have also established a presence in the GIL market, with ongoing developments and production capabilities [66][69].