VOLTAGE CONTROL DEVICE AND VOLTAGE CONTROL METHOD CONSIDERING POWER LOSS DUE TO LINES

A voltage control device includes a voltage control module being able to regulate a voltage that is supplied to a load or is transmitted backward from a load, a power loss predictor predicting or calculating a power loss amount due to a line of a power system, and a cooperative controller giving the target voltage to the voltage regulation module. A voltage control method includes a data collection step in which power data of a voltage regulation module, which is configured to regulate a voltage that is supplied to a load or is transmitted backward from a load, are transmitted to a data collector, a target voltage calculation step of calculating a target voltage to be regulated of the voltage regulation module, and a voltage control step of controlling the voltage regulation module at a target voltage or giving the target voltage to the voltage regulation module.