Method of voltage regulation and parallelism among high voltage sources and/or energized gaps, wherein said high voltage sources and/or energized gaps comprise different power transformers and/or transformer banks, comprising the steps of: a) determining a tap equivalence among taps of said transformers and/or transformer banks from the measurement of supply from a respective bar; b) checking the voltage of at least one voltage source and/or energized gap from the measurement of the voltage thereof; c) comparing the voltage measured in the previous step with a reference value for the tap equivalence of regulation and parallelism; and d) issuing an automated command to provide or re-establish tap equivalence among taps for regulation and parallelism of a programmed voltage; wherein, - when a high voltage source and/or energized gap is on maximum tap, it blocks switching to increase all taps and optionally emits a corresponding signal; and - when a high voltage source and/or energized gap is on minimum tap, it blocks switching to lower all taps and optionally emits a corresponding signal; wherein, - said steps of comparison and issuing of command are made with the use of an algorithm comprising the comparison between the voltage value measured in one of the high voltage sources and a reference value; if the measured voltage value is different in relation to the reference value for a specified amount of time and up to a specified threshold, a command is engaged to restore the reference voltage value; and characterized in that variables for transformers are created to select transformers as Master or Slave or Individual or an automatic or manual selection occurs per transformer. a) determining a tap equivalence among taps of said transformers and/or transformer banks from the measurement of supply from a respective bar; b) checking the voltage of at least one voltage source and/or energized gap from the measurement of the voltage thereof; c) comparing the voltage measured in the previous step with a reference value for the tap equivalence of regulation and parallelism; and d) issuing an automated command to provide or re-establish tap equivalence among taps for regulation and parallelism of a programmed voltage; wherein, - when a high voltage source and/or energized gap is on maximum tap, it blocks switching to increase all taps and optionally emits a corresponding signal; and - when a high voltage source and/or energized gap is on minimum tap, it blocks switching to lower all taps and optionally emits a corresponding signal; wherein, - said steps of comparison and issuing of command are made with the use of an algorithm comprising the comparison between the voltage value measured in one of the high voltage sources and a reference value; if the measured voltage value is different in relation to the reference value for a specified amount of time and up to a specified threshold, a command is engaged to restore the reference voltage value; and characterized in that variables for transformers are created to select transformers as Master or Slave or Individual or an automatic or manual selection occurs per transformer. - when a high voltage source and/or energized gap is on maximum tap, it blocks switching to increase all taps and optionally emits a corresponding signal; and - when a high voltage source and/or energized gap is on minimum tap, it blocks switching to lower all taps and optionally emits a corresponding signal; wherein, - said steps of comparison and issuing of command are made with the use of an algorithm comprising the comparison between the voltage value measured in one of the high voltage sources and a reference value; if the measured voltage value is different in relation to the reference value for a specified amount of time and up to a specified threshold, a command is engaged to restore the reference voltage value; and characterized in that variables for transformers are created to select transformers as Master or Slave or Individual or an automatic or manual selection occurs per transformer.