On April 1, 2023, Unit 7 of Fengning Pumped Storage Power Station successfully completed a 15-day trial run, with excellent performance indicators and qualified for commercial operation. So far, DONGFANG ELECTRIC MACHINERY CO., LTD. Fengning Phase II project has come to a successful conclusion.

Fengning Pumped Storage Power Station is located in Fengning Manchu Autonomous County, Chengde City, Hebei Province. It is currently the pumped storage power station with the largest installed capacity in the world. It is a major project of State Grid to promote the construction of UHV power grid and serve the development of clean energy. The total installed capacity of the power station is 3,600 MW, which will be developed in two phases. DONGFANG ELECTRIC MACHINERY CO., LTD. is responsible for the development of four 300 MW fixed-speed units for the second phase. On December 30, 2021, the first batch of units of the Fengning Pumped Storage Power Station developed and supplied by DONGFANG ELECTRIC MACHINERY CO., LTD. were put into operation for power generation, providing support services for the all-green power supply for the 2022 Beijing Winter Olympics.

The Fengning Pumped Storage Power Station can store nearly 40 million kilowatt-hours of new energy at one time, and can consume 8.7 billion kilowatt-hours of new energy throughout the year. In emergency situations, it can provide a maximum regulation output equivalent to one-third of the Three Gorges Hydropower Station.

The pumped storage unit is known as the "Pearl in the Crown" in the field of hydropower equipment, and its R&D and manufacturing are complex and difficult "hard bones" in the hydropower industry. The Fengning pumped storage unit independently developed by DONGFANG ELECTRIC MACHINERY CO.,LTD. is the first to create a rotor rotating counterweight structure, which improves the accuracy of the rotor counterweight. During the operation of the unit, the swing of the three bearings does not exceed 70 microns, which meets the requirements of the high-quality unit. ;Using the unique vibration isolation and noise reduction technology independently developed, effectively reducing the operating noise and vibration of the unit; using low-loss bearing technology, changing the traditional soaking lubrication method, greatly reducing bearing loss, reducing oil mist generation, and enhancing cooling effect. Improve motor efficiency. The core components of the generator are produced in a digital workshop, and the product quality and production efficiency are greatly improved.

In recent years, DONGFANG ELECTRIC MACHINERY CO.,LTD. has promoted continuous breakthroughs in key parameters of pumped storage units through continuous technological research and development. Successfully completed the commissioning of the deep storage unit of the first domestically produced pumped-storage project, transforming from an equipment supplier to a service provider; assisted the Jixi high-head, large-capacity pumped-storage project to create an industry record of "five investments and six grid connections in one year"; realized the first domestic The Dunhua pumped-storage unit with a water head of 700 meters was successfully commercialized; the world's first "6+6" long-short blade runner was successfully applied to a domestic pumped-storage transformation project, setting a model for the localization of pumped-storage unit technology; the highest water head in China was developed in Changlongshan The energy storage unit breaks through the technological bottleneck in the development of the pumped storage unit. The Meizhou pumped storage unit created the shortest record for start-up and commissioning; the Yimeng pumped storage unit achieved "zero counterweight", creating a new record in the industry...

At present, DONGFANG ELECTRIC MACHINERY CO.,LTD. has systematically built a pumped storage unit research and development, design, production, installation, service, complete set, commissioning, and transformation system with completely independent intellectual property rights. There are more than 80 sets of pumped storage units, with a capacity of 40-425 MW and a water head of 63-756 meters. The overall development and commissioning service level of pumped storage units has reached domestic leading and world-class.Editor/Ma Xue