State Grid Taizhou Power Supply Company: Self-Developed UHV Patrol Guidebook Enhances Grid Operation Efficiency

On July 14, State Grid Taizhou Power Supply Company deployed its self-developed Ultra-High Voltage (UHV) Corridor Patrol Guidebook during inspections of the ±800 kV Xizhou-Taizhou HVDC line. This standardized, visual guidance system increased foreign object detection rates by 20%.

UHV transmission corridors face challenges including vast coverage and concealed hazards. Traditional patrol methods suffered from inconsistent standards and unclear priorities. While drones are utilized, algorithmic inaccuracies and monitoring blind spots persist. Data from January to May revealed that 60% of 47 identified UHV corridor hazards relied on manual experience.

To overcome the dilemma, State Grid Taizhou Power Supply Company innovatively compiled a patrol roadmap in June: using HD satellite imagery as basemaps, corridors are segmented into: 300m core zones (per tower span), 500m key zones, 1000m peripheral zones. Critical points are annotated, including: E-bike accessible inspection points, construction black spots, vegetation encroachment risks. Implementing “One Span, One Map, One Checklist” for Satellite image comparison, dynamic hazard classification, visualized risk positioning, tiered early warnings. At the same time, according to the different requirements of periodic and special inspections, plan different inspection routes, accurately implement differentiated control, and achieve risk targeted locking.

“The Road Book has transformed hidden dangers from ‘finding a needle in a haystack’ to precise navigation. ” Wang Xiaojian, a line inspector at State Grid Taizhou Power Supply Company, opened the manual and displayed that each page was equipped with real-life photos and coordinate distribution maps, allowing new employees to quickly grasp the essentials of inspection. In the first month of application, significant results were achieved. In addition to a sharp increase in hidden danger capture rate, 86 standardized inspection files were established, and 2 cases of illegal construction were blocked in advance, creating a new paradigm for intelligent operation of ultra-high voltage lines. (By Yang Yi and Wu Junyang)