FIELD: electricity.
SUBSTANCE: smart power module is claimed comprising a three-phase transformer with three closed iron magnetic cores, each of which is provided with an input and three output windings, two of which are connected in series, the first of which is connected in anti-series with third winding which is arranged in a zigzag pattern in adjacent magnetic circuit as in a balancing transformer. Three second windings of each of the magnetic cores are provided with N terminals connected to respective phases of power transmission line through controllable triacs. The free ends of three third windings are connected in parallel to three like windings of single-phase transformer, the secondary winding of which is connected in series between the common point of the free ends of three said input of the single-phase transformer and the neutral bus of the power transmission line. The selection of respective drops of the second multi-drop windings of the three-phase transformer through N corresponding controlled triacs to the three phases of the power transmission line is performed automatically by means of three identical automatic control systems from electronic devices for controlling the current force in each phase and voltages therein at the beginning of the power transmission line, and also by means of three separate two-loop automatic control systems with conversion of control analog signals to digital codes with following decoder with number of channels N at outputs of each decoder connected with controllable triacs through N optopairs. The automatic control system included in the module includes a phase current measuring device, an alternating current voltage meter at the beginning of the power transmission line, a voltage meter falling in the phase conductor with a known resistance in the power transmission line, two constant voltage shapers-equivalents of voltage difference at the beginning of the line and the phase line and the voltage to be stabilised at the end of the phase conductor of the power transmission line, and also an analog adder.
EFFECT: increased performance of voltage control process at consumer on each of the phases with increased stabilisation accuracy, increased reliability of the action, skew elimination of phase voltage and reduced electric power losses by reducing the equalizing current in neutral bus during automatic redistribution of energy flows to different consumers along their dedicated transmission lines with expansion of power consumption range by different consumers.
2 cl, 3 dwg
