近日，世界最高额定水头抽水蓄能电站——浙江天台抽水蓄能电站完成首台机组蜗壳水压试验。

蜗壳水压试验是抽水蓄能电站机组埋件安装阶段的一项严格“大考”，其目的是对蜗壳的设计、制造和安装工作进行全面检验。浙江天台抽蓄电站机组蜗壳设计工作压力为12.24兆帕，此次水压试验的最高压力值为18.36兆帕、保持压力30分钟。试验结果表明，蜗壳各部位的监测数据均满足规范和设计要求，座环蜗壳及相关管路未发生渗漏等异常情况。此次水压试验的完成，为下一步座环蜗壳混凝土保压浇筑奠定了基础。

“每台机组蜗壳在埋入混凝土之前都必须通过这样的严格‘大考’，以确保蜗壳整体质量满足机组长期安全稳定运行要求。”三峡集团所属三峡建工驻天台抽水蓄能电站现场负责人说道。

据介绍，本次蜗壳水压试验完成后，浙江天台抽水蓄能电站1号机组将转入连续混凝土浇筑阶段，计划于2024年10月份浇筑到发电机层。

Recently, the world's highest rated head pumped storage power station - Zhejiang Tiantai pumped storage power station completed the first unit volute hydraulic test.

Hydraulic test of volute is a strict "big test" in the installation stage of embedded parts of pumped-storage power station, its purpose is to conduct a comprehensive inspection of the design, manufacture and installation of volute. The volute design working pressure of Zhejiang Tiantai pumping and storage power station unit is 12.24 mpa, the highest pressure value of the hydraulic test is 18.36 mpa, and the pressure is maintained for 30 minutes. The test results show that the monitoring data of each part of the volute meet the specifications and design requirements, and the seat ring volute and related pipelines do not leak and other abnormal conditions. The completion of the hydraulic test has laid a foundation for the next step of pressure retaining concreting of the seat ring volute.

"Each unit volute must pass such a strict 'big test' before being buried in concrete to ensure that the overall quality of the volute meets the long-term safe and stable operation requirements of the unit." Three Gorges Group Sanxia construction workers in the roof pumped storage power station site responsible person said.

According to reports, after the volute hydraulic test is completed, Unit 1 of Zhejiang Tiantai pumped storage Power Station will be transferred to the continuous concrete pouring stage, which is planned to be poured to the generator layer in October 2024.