The article considers the issue for development of the computer-aided program designed for determining optimal location for installation of symmetry facilities in 0.4 kV power supply systems with the motor-drive load in conditions of imbalance of voltages. The program is designed for making electrotechnical calculations during designing, modernization and operation of electrical grids with available motor drive load. It ensures plotting of schematic circuits for 0.4 kV power supply system sections with installed symmetry facilities. The software program provides for calculation of different symmetry options and for selection of the most economically feasible one.  Using the program in motor-drive load power supply systems will enhance the asynchronous motor reliability and efficiency. The program is of interest during development of the power supply system projects for the regions with available non-linear loads.