en.Wedoany.com Reported - Chengdu's first 100kW/233kWh transformer area energy storage demonstration project was recently put into operation on Xiaojiagou Street in Chengdu High-tech Zone. Jointly built by Chengdu Better Digital Energy Technology Co., Ltd. and State Grid Gaoxin Power Supply Company, the project provides power services to 386 households across two residential compounds, offering a replicable demonstration model for systematically addressing power supply challenges in old residential communities across the district.
Some residential communities on Xiaojiagou Street in Chengdu High-tech Zone were built relatively early, and their initial planning did not account for the connection of high-power loads such as charging stations and air conditioners. In recent years, the large-scale integration of Automotive Industry" target="_blank">new energy vehicle charging stations and the continuous increase in the number of residential air conditioners have caused electricity demand in some communities to far exceed design capacity. During peak summer periods, when high-power devices such as air conditioners, charging stations, and electric water heaters are used simultaneously during evening peak hours, transformer area transformers operate under full load for extended periods, posing severe challenges to power supply reliability.
To address this governance challenge, Chengdu High-tech Zone has adopted transformer area energy storage as a solution to the power bottleneck in old residential communities, replacing traditional capacity expansion methods. A transformer area refers to the power supply zone covered by a single distribution transformer, typically serving a residential community, village, or commercial area. Transformer area energy storage involves installing energy storage equipment within the power system's transformer area, which stores and releases electricity to alleviate supply pressure, stabilize voltage, and enhance power supply reliability.
Transformer area energy storage can provide 40kW to 100kW of storage power support for 10kV/0.4kV distribution transformers, with a continuous discharge duration of 2 to 5 hours, effectively reducing peak load by 10% to 25%, achieving dual benefits of peak shaving and valley filling as well as emergency backup.
Chengdu High-tech Zone has also leveraged a virtual power plant platform to innovatively create a cloud-based energy storage aggregation model. This model uses a digital platform to centrally monitor, uniformly dispatch, and conduct market-based trading of scattered transformer area energy storage across the region, integrating massive distributed storage into a single virtual large-scale storage power station. By participating in the electricity market as a unified entity, it addresses the issues of small capacity and dispersed layout of transformer area storage, which hinder independent participation in electricity market transactions, thereby opening a new market-oriented path for the large-scale application of distributed energy storage.
Building on the Xiaojiagou demonstration project, Chengdu High-tech Zone has established a transformer area energy storage governance mechanism characterized by "government coordination + grid collaboration + market participation." The "Special Action Plan for Large-Scale Construction of New Energy Storage (2025–2027)" issued by the National Development and Reform Commission and the National Energy Administration explicitly calls for accelerating the large-scale and market-oriented development of new energy storage. As a major clean energy province, Sichuan is rich in hydropower, wind power, and solar resources. Starting with this project, Chengdu High-tech Zone is translating national strategic deployments into grassroots practices for regional energy governance.
Going forward, Chengdu High-tech Zone will survey electricity demand in old transformer areas across the district, promote the replication and large-scale deployment of transformer area energy storage projects, expand energy storage installed capacity and application scenarios, and ensure power supply during peak summer periods and regional energy security.
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