Nanchong, Sichuan: Early morning battle, scorching heat, energy storage empowerment, benefiting people's livelihoods

In the scorching summer, the earth is scorching with high temperatures for days, and the electricity load for rural residents' air conditioning and farmland irrigation continues to rise. At 5am recently, staff from State Grid Nanchong Power Supply Company have gathered in Group 5, Yangjiaqiao Village, Yangjin Line, 10kV, preparing to seize the early morning window period and carry out special construction operations for the overlap of flexible and direct AC energy storage device equipment and the production and installation of grounding wires.

Previously, during the peak electricity consumption period in summer in the 5th community of Yangjiaqiao Village, residents' daily electricity consumption and agricultural production electricity overlapped, and the distribution transformers were in a long-term overloaded operation state, resulting in low voltage and unstable power supply. This not only affected the daily home electricity experience of villagers, but also restricted local agricultural irrigation production.

In order to effectively solve the problems of electricity overload and unstable voltage during peak hours, Nanchong Power Supply Company has decided to install flexible DC AC energy storage devices in this area. The installation process of energy storage devices requires high standards and detailed operation procedures, covering multiple core processes such as precise overlapping of energy storage equipment, cutting and production of grounding wires, welding anti-corrosion, grounding burial, and safety verification. To avoid the scorching heat during the day and prevent safety risks of high-temperature operations, the company has made advance arrangements, refined construction plans, clarified personnel division of labor, identified operational risks, and prepared sufficient heatstroke prevention materials. On the day of the operation, all personnel gathered in advance, completed safety technical briefing, strictly implemented low-voltage operation and outdoor construction safety control measures, and started the construction operation with complete equipment.

The sky is gradually brightening, the temperature is rapidly rising, and the construction site is stuffy and unbearable. The staff should dress appropriately, prepare safety protective equipment, and devote themselves wholeheartedly to the construction operation. In the process of equipment overlap operation, they accurately connect the equipment interface, fasten the wiring terminals, and polish the contact surface of the circuit to ensure that the equipment overlap is firm and the power supply is stable. In the subsequent production of grounding wires, they crouched down and operated meticulously, accurately cutting materials, standardizing welding reinforcement, and doing a good job of anti-corrosion treatment. They strictly controlled every construction detail, repeatedly checked the grounding resistance value, and ensured that every detail and step was controllable and under control. As time passed, the temperature continued to rise, and sweat repeatedly soaked through the clothes of the staff. Their cheeks and necks were covered in beads of sweat, and their hands were covered in dust and sweat stains. After three and a half hours of continuous operation, the construction task was successfully completed, and all installation indicators of the energy storage device met the standards.

After the formal operation of the flexible and direct AC energy storage device, it will build a solid barrier for peak shaving, valley filling, voltage stabilization, and emergency backup in the distribution network of Yangjiaqiao Village's 5 communities. During periods of low electricity consumption, the device can automatically store surplus electrical energy. During the peak electricity consumption period in summer, timely release electrical energy and divert the load of the substation area to completely solve the problems of low voltage and unstable power supply in the area during summer. At the same time, the device can provide emergency power supply guarantee in case of sudden power grid failures, effectively reduce distribution network operation losses, delay equipment expansion and renovation investment, and comprehensively improve the reliability and quality of power supply in the jurisdiction.

Next, Nanchong Power Supply Company will continue to do a good job in energy storage equipment debugging, regular inspection and maintenance, continuously optimize the distribution network structure in its jurisdiction, fill in the gaps in rural power supply, and make every effort to build a strong defense line for peak summer electricity security.