Power monitoring and control apparatus and power monitoring and control system

摘要

A power monitoring and control apparatus and system are provided, which level charge loads of electric vehicles over an overall power system as well as make the power loads fall within the maximum contract power, in plug-in charging of the electric vehicles in individual houses. The power monitoring and control apparatus is used in charging a battery-mounted equipment from the power system through a battery charger. The apparatus compares a current value available for charging the battery-mounted equipment from the power system with a charging current value requested to the battery charger from the battery-mounted equipment, and employs as the charging current to the battery-mounted equipment a smaller one among the charging current available value and the charging request value.

主权项

1. A power monitoring and control apparatus for use in charging battery-mounted equipment from a power system through a battery charger, wherein
a current control calculation value indicative of a current value available for charging the battery-mounted equipment from the power system and a charging request value indicative of a current value requested to the battery charger from the battery-mounted equipment are compared; smaller one among the current control calculation value and the charging request value is employed as a current control value indicative of a charging current to the battery-mounted equipment; a plurality of the battery chargers and a plurality of the battery-mounted equipment are connected to the power system; a current value or a voltage value in the power system acquired by a sensor at a predetermined period, and a coefficient of incremental current determined based on impedance compared with current on the bus of the power system is calculated; and the battery-mounted equipment to be charged and a supply current quantity to the battery-mounted equipment are determined based on the calculated sensitivity coefficient.