Maintaining voltage level within permitted range is one of the most important factors regarding power supply qualityand normal power system operation. Integration of highly variable power sources such as wind power plants (WPP) into distribution network emphasizes the voltage regulation issues. In this paper, voltage profile in 30 kV network after connection of wind power plant was analyzed regarding different WPP reactive power regulation strategies. A brief description of analyzed system based on the measurements and computer simulations is given.