Journal of Electrical Engineering and Automation

As a key auxiliary equipment in the operation of hydropower stations, the energy consumption of the auxiliary system in hydropower plants has increasingly attracted attention. Traditional asynchronous motors have problems such as low efficiency and frequent maintenance during long-term operation, which restrict the overall energy efficiency level of the system. This paper takes the application of permanent magnet motors in the retrofit of auxiliary systems in hydropower plants as the research object to explore their practical benefits in energy conservation and consumption reduction. By comparing and analyzing the operation efficiency, power factor, and energy consumption data of the motors before and after the retrofit, the power saving effects of permanent magnet motors under different working conditions are evaluated. Additionally, economic and feasibility demonstrations are conducted combined with specific cases. The application of permanent magnet motors can significantly reduce the power consumption of auxiliary systems, improve the operational stability of the systems, and has good promotion value and application prospects.

Hydropower plant; Auxiliary system; Permanent magnet motor; Power saving benefit; Energy efficiency improvement