Nestled amidst the undulating mountains of the Chuxiong Yi Autonomous Prefecture in Yunnan, a "blue ocean" spanning thousands of mu is quietly converting sunlight into clean electricity. The Dayao County 523,000 kW photovoltaic (PV) base, comprising the Xiaozhuyuan and Shiyang power stations, shines like two pearls embedded in the heart of Yunnan. Behind the illumination of countless households lies the silent, daily perseverance of Tongwei Fishery-PV-IoT operation and maintenance (O&M) team.

Unceasing Steps: The "Light Chasers" Among 193 Arrays

The 193 PV arrays are scattered across 11,000 mu of mountainous terrain, and the inspection route is a constant challenge against steep slopes and ravines. Carrying tools, O&M personnel traverse the area on foot under the scorching sun. They meticulously inspect each solar panel, clear bird droppings and fallen leaves, and tighten loose bracket bolts. When sudden downpours cause local flooding, they promptly clear drainage systems. When the collection lines show potential hazards due to inclement weather, they hike over mountains and ridges to ensure that every "energy artery" remains unobstructed. The sweat stains and salt marks on their work clothes are a unique testament to their dedication to this land.

Step-up Substation: A 24-Hour "Guardian Light"

The Shiyang and Xiaozhuyuan 220 kV step-up substations serve as the "heart" of the power stations. Here, the lights stay on 24/7, with O&M staff on duty in shifts. They closely monitor the myriad data points on the monitoring screens—main transformer temperature, SVG operating status, switchgear signals—because every minor fluctuation demands attention. When equipment alarms sound late at night, the O&M team responds immediately, performing precise switchgear operations under emergency lighting. During preventive testing, they are meticulous to the smallest detail, ensuring that core equipment such as the main transformer operates at its optimal thermal and electrical state. The steady hum of this "steel fortress" is the tranquility earned by the team's constant vigilance.

A Collaborative "Symphony" in the Mountains

O&M is not only a technical task but also a test of responsibility and collaboration. They need to coordinate with testing units to efficiently complete inspections and ensure equipment health. They are always on standby to handle sudden tripping events, restoring power transmission as quickly as possible. They maintain smooth communication with local governments, ensuring road access and a harmonious external environment within the site. They even pay attention to the details of road cleaning and the integrity of every fire-fighting facility within the station area. Like interlocking gears in precision machinery, they drive stable green energy into the grid by meshing tightly in their respective positions.

Their ordinary daily dedication etches Tongwei Fishery-PV-IoT's professional O&M footprint across Dayao's red soil. The efficient management of 193 arrays, the safe operation of two "heart" substations, the unobstructed operation of 21 collection lines, and the rapid response to emergencies—this is not only the daily routine of the Xiaozhuyuan and Shiyang power stations but also a concentrated reflection of Tongwei Fishery-PV-IoT's standardized, refined, and systematic O&M capabilities. Every step the team takes in the scorching sun and rain, every precise operation, and every collaborative effort are safeguarding the stable output of 523 MW of green energy, and also continuously honing the company's core competitiveness in the field of large-scale new energy power station O&M.

This dedication, rooted in the front lines, ensures not only the efficiency of a single power station but also embodies the reliable strength of Tongwei Fishery-PV-IoT in serving the country's energy transition. We measure our responsibilities with expertise and uphold promises with sweat, ensuring that every unit of clean electricity is efficiently and safely integrated into the grid—delivering steadfast and reliable O&M support for Yunnan's green mountains and clear waters, and for the country's "dual carbon" goals. We salute every Tongwei Fishery-PV-IoT staff who silently "chases the light." You are the cornerstone of illuminating the green future, and the foundation for the company to set benchmarks and gain trust in the new energy O&M field.