The Yongde grid-forming shared energy storage project, supplied by Sineng Electric, has been operating stably for over two months. Marking a milestone for Yunnan Province, the project is the region’s first of its type.
Sineng developed and delivered an innovative solution for the project, featuring a 5MW central PCS MV turnkey station and booster integration system, based on its 1250kW central PCS. Equipped with the company’s Next-Gen enhanced hybrid grid-forming technology, the plant can effectively handle disturbances caused by a high penetration of renewables, significantly strengthening grid resilience.
Sineng’s grid-forming PCS enables rapid establishment of stable voltage, frequency and phase angle under extreme operating conditions. Leveraging its inherent synchronous voltage source characteristics, it achieves millisecond-level dynamic power support and quickly restores power quality. In the event of large-scale grid separation or outage, the plant can seamlessly switch to off-grid mode to supply critical and emergency loads, while providing fast and reliable black start services to ensure the safe and stable operation of the regional grid under extreme scenarios.
With the project successfully connected to the grid, the shared energy storage system will demonstrate full hybrid grid-forming capabilities, delivering services such as renewable output smoothing, peak shaving and valley filling, primary and secondary frequency regulation, inertia response and damping support and black start. This establishes an efficient and flexible “generation-grid-load-storage” interaction framework, creating a replicable and scalable “Yongde Model” for the large-scale development and integration of renewables in Western Yunnan.
