Leveraging its advanced technology, high reliability, and industry-leading position, our synchronizing devices and synchro-check relays are well aligned with the stringent requirements of this pumped-storage power station—recognized as the domestic project with the largest single-unit capacity and the highest head—providing an smart and high-precision synchronizing and grid-connection solution.

The project is a key implementation under China’s Medium- and Long-Term Pumped Storage Development Plan (2021–2035) during the 14th Five-Year Plan period and represents the largest single-investment clean energy project in Zhejiang Province, with a total investment of RMB 10.741 billion.

The station has a total installed capacity of 1,700 MW, equipped with four 425 MW reversible units, each being the largest of its kind in China. With a rated head of 724 m, the highest in the world, the plant is expected to generate approximately 1.7 billion kWh annually. The facility consists of an upper reservoir, lower reservoir, water conveyance system, underground powerhouse, and switchyard.

Due to frequent start-stop operations and significant load fluctuations, the power station places extremely high demands on synchronizing system stability. To address these challenges, the SID-2FY synchronizing device adopts a redundant hardware and software architecture, ensuring fault-free operation under high-head hydraulic impact and preventing grid-connection interruptions caused by single-point failures. In addition, the fully self-developed synchronizing solution eliminates external technical dependencies, meeting national security requirements for critical energy infrastructure.

With four 425 MW reversible units requiring frequent switching between generation and pumping modes, and with significantly different grid-connection parameters for each mode, our solution—drawing on nearly 40 years of experience in synchronizing applications—employs a multi-mode adaptive algorithm to accurately accommodate both operating conditions. Through a proprietary phase-sequence identification function, the system automatically recognizes operating modes and intelligently switches control strategies, enabling full-process automation and achieving precise, autonomous control from grid synchronization to mode transition without manual intervention.