Power management device for apartment houses using conservation voltage reduction and charging scheduling

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.