Abstract: A voltage control device includes a voltage regulator module, a cooperative controller, and a conservation voltage reduction (CVR) factor calculator. The voltage regulator module regulates a voltage supplied to loads or reversely transmitted from the loads. The cooperative controller controls the voltage regulator module according to a target voltage or sending the target voltage to the voltage regulator module. The CVR factor calculator estimates a CVR factor. The target voltage is calculated by reflecting a voltage drop due to CVR using the CVR factor. The CVR factor is estimated in different methods according to at least one of a measurement time, a load state, and a representative value.

Abstract: A voltage control device in an output limit situation of a solar power generation facility performs an algorithm to calculate output points adjacent to a limited output (PR) from the current output point of the solar power generation facility. The voltage control device may include a pattern calculation unit for calculating an output pattern comprised of the output points and a voltage adjustment unit for controlling the terminal voltage of the solar panel with the voltage of the final output point of the output pattern.

Abstract: A power management device includes a pattern analyzer configured to analyze a demand pattern that is a power pattern for consumption by an apartment complex, a charging scheduler configured to receive a first demand pattern from the pattern analyzer, and to calculate a second demand pattern obtained by adjusting charging time of an electric vehicle charger, a prediction voltage calculator configured to receive power data from the pattern analyzer, and to calculate a prediction voltage of the apartment complex, and a controller configured to calculate a recommendation voltage for conservation voltage reduction (CVR) by using the prediction voltage, wherein the controller may be configured to perform control such that the recommendation voltage is an operation power of the apartment complex, and the operation power may satisfy the second demand pattern.

Abstract: 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.

Abstract: A voltage control device includes a voltage regulation module regulating a voltage that is supplied to a load or 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 controlling the voltage regulation module at a target voltage or giving the target voltage to the voltage regulation module. A voltage control method includes data collection step in which power data of a voltage regulation module regulating a voltage that is supplied to a load or transmitted backward from a load are transmitted to a data collector, target voltage calculation step of calculating a target voltage to be regulated of the voltage regulation module, and voltage control step of controlling regulation module at a target voltage or giving the target voltage to the voltage regulation module.