The choice of parameters of devices of symmetrizing in distributive electrical networks of 0.38 kV

Low-voltage distributive electric networks of 0.38 kV objectively work in the mode of considera-ble asymmetry of currents and tension. A research objective was the determination of parameters of the symmetrizing device depending on the set pa-rameters of loading and indicators of asymmetry. The research problems were definition of symmet-ric components of conducting direct (return) and zero sequences of SU, and also an example of cal-culation of the SU parameters on the basis of the received expressions. The method of determination of parameters of the symmetrizing devices for nor-malization of quality and decrease in the additional losses of electric energy caused by asymmetrical power consumption in distributive networks of 0.38 kV was presented in the study. As basic data for mathematical model the results of measurements of indicators of asymmetry of currents and tension serve in an electric network, parameters of the net-work of 0.38 kV, and also relative capacities phase asymmetrical and three-phase symmetric loadings. As the main methodological prerequisites the method of symmetric components and also theoret-ical bases of electrical equipment were used. Mathematical expressions for the definition of symmetric components of conducting straight line (return) and zero sequences of the symmetrizing device (SD) are received. In basic data for an ex-ample of calculation materials of the scientific re-searches made for definition of indicators of asym-metry at known values of parameters of electric network and the SU parameters were used. For the determination of the SU parameters it is necessary to perform previously measurement (or calculation) indicators of asymmetry of currents and tension in the studied electric network. Knowing the parame-ters of electric network and the results of meas-urement of indicators of asymmetry, determine the SU parameters. The presented example of calcula-tion correlates with data of the previous researches.