Power selection of a static symmetrical device under dynamically changing load conditions

Introduction. Imbalance of currents and voltages is one of the constantly operating factors in the operation of electric networks. Redistribution of loads by phases is not always a sufficient measure to reduce asymmetry. Under certain conditions, asymmetry reduction can be achieved only by using symmetrical devices. However, in conditions of variable character of the symmetrized load the application of symmetrical devices can cause a number of technical difficulties connected with the necessity to regulate the parameters of the symmetrical device. Goal. Determination of the optimum value of the reactive elements power of the static symmetering device on the basis of the Steinmetz scheme at symmetrization of the variable load. Materials and methods. The research is based on a series of computational experiments allowing to form different load schedules with the possibility of selecting the optimal parameters of the symmetering device. Results and discussion. The value of the optimum power of the symmetering device under conditions of variable schedule of the symmetrized load has been determined. Conclusion. According to the results of the conducted research it is possible to draw a conclusion that regardless of the shape of the schedule of the symmetrized load the optimal power of the static symmetrical device corresponds to the average integral value of the variable power of the load.