In order to add a hydraulic generator to the scissor type aerial work platform to produce 5 kW single AC output,a control system of the hydraulic generator was designed.A diesel engine with power of 20 kW was used to drive a variable displacement piston pump with DFR1 control mode and displacement of 45 mL/r.A set of hydraulic onoff,flow control valve and a singlephase hydraulic generator with rated power of 5 kW were added to realize the function of stable output AC.Different flow control valves were tested.The results show that by using the SRE type flow limiter,the most stable power generation effect can be obtained.