Evaluation of the expansion of the functionality of a reactor-thyristor voltage regulator with wide voltage regulation ranges

   The paper considers the effect of a reactor-thyristor voltage regulator during voltage stabilization on the sinusoidal current and voltage of electrical complexes and systems with a stepwise increase in supply voltage to +16 % and a decrease in load current to –70 % of the nominal level. This study is conducted in the Matlab environment on a simulation model of electrical complexes and systems using measuring modules to evaluate the expansion of the functionality of the proposed voltage regulator when voltage is stabilized in electrical complexes and systems with high energy performance. The study is conducted when the supply voltage is increased to +16 % in steps of +2.5 %, and when the load current is reduced to –70 % in steps of –10 % of the nominal value. The obtained research results confirm that the claimed device does not distort the sinusoidal voltage of the supply network and currents of electrical complexes and systems when regulating voltage in wide aisles and sub-ranges. The results of numerical experiments also showed that the new technical solution creates a maximum voltage distortion in the power transformer and in electricity consumers by 3.75 % when the voltage in the supply network increases by +10 % and by 1.63 % when the load current decreases by –40 % of the nominal level, which does not exceed the normally permissible standards established by domestic and foreign GOST standards. The most appropriate area of application of the claimed technical solution is electrical engineering complexes and systems where it becomes necessary to maintain the voltage at a given level in the event of a positive deviation and voltage fluctuations in the supply network and negative deviations, and current fluctuations on the load in wide ranges with high efficiency.

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