The structure, performance and main technical parameters of Type TYQ78 hydraulic governor is expounded, with emphasis on its draft design, technology and test results.

YDT_3000 governor adopted in Xiangshan hydroelectric Plant is the typical electric hydraulic governor. At present, it is mainly adopted in domestic middle and small_sized hydroelectric stations.

Governor oil pumping unit and hydraulic accumulator shall be tested and correct functioning of the system will be verified.