Voltage control device and method considering line power loss in voltage drop using CVR factor

A voltage control method comprising:

• data collection of transmitting power data of a voltage regulator module to a data collector, wherein the voltage regulator module regulates a voltage supplied to loads or reversely transmitted from the loads;
• target voltage calculation of calculating, by the voltage regulator module, a target voltage to be regulated and collecting and storing a load-specific conservation voltage reduction (CVR) factor;
• power loss calculation of calculating a power loss of a line of a power system;
• and
• voltage control of controlling, by a cooperative controller, the voltage regulator module according to the target voltage or sending the target voltage to the voltage regulator module,
• wherein the target voltage is calculated by reflecting a voltage drop due to CVR using the CVR factor, and
• the CVR factor is estimated in different methods according to at least one of a measurement time, a load state, and a representative value,
• wherein a reduction in power caused by the voltage drop due to CVR is calculated by multiplying the voltage drop to the target voltage and the CVR factor, and
• the voltage drop to the target voltage is determined by reflecting the line power loss calculated in the power loss calculation.