Jiangsu’s first regionally decentralized grid-side vitality storage venture efficiently related to grid

On September 30, the 49.8MW/99.6MWh grid-side vitality storage energy station of Suqian Zhonghe East Line New Power in Jiangsu was formally related to the grid. This marks the official operation of Jiangsu’s first grid-side impartial vitality storage venture constructed in a regionally decentralized method, offering a brand new mannequin for the event of grid-side vitality storage.

As a unit below unified dispatch and administration, grid-side vitality storage energy stations assist the grid by storing and releasing electrical energy to realize load “peak shaving and valley filling,” enhancing the steadiness and security of the facility system. In areas wealthy in new vitality sources reminiscent of wind and solar energy, vitality storage energy stations have turn out to be an efficient means to stability clear vitality consumption and make sure the wholesome growth of recent vitality.

Lately, new vitality, primarily wind and solar energy, has seen fast growth in Jiangsu. Take Suqian for instance: by the tip of September 2025, the town’s put in capability of recent vitality had exceeded 6.652 million kilowatts, accounting for 79.9% of the town’s whole put in energy capability. Whereas large-scale new vitality grid connection enhances vitality provide safety, its excessive penetration price has led to inadequate consumption capability in some areas, and even trigger reverse energy move resulting in gear overload, impacting grid security and stability. To handle this, State Grid Suqian Energy Provide Firm actively explored new paths for vitality storage growth in areas with excessive proportions of recent vitality entry in Siyang County and Sihong County, Jiangsu Province, innovatively guiding social capital to take part in establishing vitality storage stations by using idle web site sources reminiscent of decommissioned substations. Amongst these efforts, 4 decommissioned 35kV substations (Qianxu, Chuancheng, Peixu, and Xinyuan) in Siyang have been chosen to construct a 49.8MW/99.6MWh regionally decentralized grid-side impartial vitality storage energy station.

By cautious design, the 4 vitality storage stations, although geographically dispersed throughout totally different cities, can function below coordinated management. Suqian Energy Provide Firm innovatively adopted a “central station + sub-station” communication structure. The Qianxu vitality storage station was chosen because the secondary system central station, outfitted with a whole secondary system, whereas the opposite sub-stations have been internally networked with simplified configurations, enabling knowledge aggregation previous to centralized transmission. With this resolution, when the grid requires the vitality storage stations to regulate their working mode, dispatch directions from the provincial firm’s management middle are despatched to the Qianxu central station, which then distributes them concurrently to every sub-station. The 4 vitality storage stations then cost and discharge synchronously, offering efficient assist for the facility grid in numerous areas of Siyang. This technical resolution represents the primary utility of its variety in China. Calculations present that whereas guaranteeing dependable system operation, it might scale back the venture’s one-time development value by roughly 10 million yuan in comparison with conventional vitality storage development strategies.

“After the Zhonghe Siyang vitality storage station is put into operation, it’s anticipated to cost and discharge over 40 million kWh yearly, present roughly 50,000 kW of short-term emergency peak-shaving capability, and meet the electrical energy demand of greater than 10,000 households. Concurrently, the venture can flexibly improve the native consumption capability for roughly 12,000 kilowatts of distributed photovoltaic energy throughout the 4 areas, lowering annual carbon dioxide emissions by 50,000 tons and saving 16,000 tons of normal coal consumption,” launched Chen Taotao, a specialist from the Improvement and Planning Division of Suqian Energy Provide Firm.

Beneath the present nationwide vitality technique of deepening the “twin carbon” (carbon peaking and carbon neutrality) targets, the progressive “turning waste into treasure” method by State Grid Suqian Energy Provide Firm—constructing regionally decentralized grid-side vitality storage utilizing decommissioned substations—has not solely successfully addressed the sensible problem of fresh vitality consumption within the regional energy grid however has additionally supplied an progressive pathway for creating new-type impartial vitality storage in Jiangsu amidst constraints on land and grid sources. (Meng Fei)