On November 10th, 2025, the High-Voltage Cable Center of Shaanxi Power Transmission & Transformation Engineering Co., Ltd. independently completed the AC withstand voltage and partial discharge detection tests of 330kV high-voltage cables for the first time at the construction site of the Zhashui-Longtan Traction Substation 330kV Line Project. The success of this test marks a technological breakthrough for the company in the core detection field of high-voltage cables, no longer relying on external technical support. As a core channel for power transmission, the insulation performance and operational stability of 330kV high-voltage cables directly affect the safety of the regional power grid. The completion of this independent test not only verifies that the cable laying quality of the project meets the standards, but also accumulates practical experience for the detection of similar high-voltage cable projects in the future, which will effectively shorten the construction cycle of power projects and provide technical support for the expansion and upgrading of the regional power grid.