Power equipment of hydropower station, electromechanical equipment that converts water energy into electric energy of hydropower station. It is mainly composed of water turbine, water turbine generator and its affiliated electrical and mechanical equipment. The complex connected with the turbine and the turbine generator is called the turbine generator set, referred to as the unit. Hydraulic turbines are divided into two categories: impact type and impact type. There are two main types of hydrogenerator: suspension type and umbrella type. The auxiliary electrical and mechanical equipment of the unit includes governor, oil pressure device, excitation equipment, automation and protection system equipment.

Compared with the thermal power station, the power equipment of hydropower station unit structure and its auxiliary equipment, auxiliary public system is relatively simple, high reliability, long life, and can quickly start and load increase and reduction, can undertake peak regulation, frequency modulation and accident backup tasks in the power grid, easy to realize the automatic monitoring or remote control of the power station, and does not pollute the atmosphere and water quality, conducive to environmental protection.