The technology of large-scale pumped storage units of Harbin Motor passed the acceptance of the Ministry of Science and Technology

A few days ago, the "Twelfth Five-Year Plan" national science and technology support plan project undertaken by Harbin Electric Machinery Factory (hereinafter referred to as "Harbin Motor") - "Development of Large-scale Pumped Storage Machine Component Equipment" successfully passed the technical acceptance
organized by the Ministry of Science and Technology.
In the 5 years of scientific research and development of the project, Harbin Electric has made major innovative achievements in water pump turbines, power generation motors, control system devices and system integration technologies, obtained 6 national invention patents, and won 3 provincial and ministerial science and technology progress awards
.

In order to successfully overcome the project, Harbin Motor has set up a number of technical research and development teams, and on the basis of years of research, it has continuously caught up with and surpassed the advanced
.
According to Wei Zhao, deputy chief designer of Harbin Motor, because the pump turbine will produce greater centrifugal force when running, and the upstream water flow through the pump turbine will produce a larger inertial force, centrifugal force and inertia force work together, often causing the unit to operate extremely unstable under certain working conditions, which is often called the "S" characteristic
in the industry.

Faced with this worldwide problem, Harbin Motor used advanced CFD hydraulic development technology to finally achieve a reasonable match between the pump working conditions of large-scale pump turbines and the performance of turbine working conditions, so that the safety margin of the head in the "S" area and the head margin in the "hump" area were as high as 18.
6% and 4.
7% respectively, reaching the world's leading level
。 At the same time, in view of the characteristics of high speed of pumping and storage units, the Harbin motor technology development team has developed a high-speed radial pole insulation pallet structure, and also established a powerful bidirectional thrust bearing test bench to realize the test of the real machine fully simulating the working conditions of the power generation motor, and developed a bidirectional elastic metal-plastic tile thrust bearing suitable for pumped storage unit, further broadening the optional technical range
of bidirectional thrust bearing.

In the R & D and design of the pumping and storage unit, on the one hand, Harbin Motor independently explores, introduces and learns the advanced technology of foreign manufacturers, on the other hand, actively carries out independent research and innovation, and takes the characteristic scientific research road of combining production, education and research, which promotes the progress of
pumping and storage technology in China.
Combined with the long-term technology and experience in the development of pumping and storage units, Harbin Motor has formed its own hydraulic performance development concept and hydraulic development technology system of pumping and storage units, with the ability to develop the hydraulic performance of modern high-head, large-capacity pumping and storage units, and has successively completed the hydraulic performance research and development
of pump turbines of a number of large-scale pumping and storage projects.
Up to now, Harbin Motor has fully mastered the key core technologies of pumped storage units of 300 MW and above, filling a number of technical gaps
in China's large-scale pumped storage units.