The article presents investigation of an output voltage vector control algorithm for the autonomous generators based on the wound-rotor induction machine. Impact of generator capacitive output filter was analysed. The analysis showed that for small values of capacitance possibly to use the vector control algorithm, which is synthesized without filter. The vector control algorithm can be used for electricity generation, where it is necessary to stabilize the output voltage of the generator at a given level under primary mover variable speed operation. The vector control algorithm requires information about the stator voltage, angular velocity and angular position of the rotor. Experimentally shown, that proposed vector control algorithm provides asymptotic regulation of the output voltage vector module regardless of the speed variation.