A power control device for an electrical installation of a building and a method of power controlling an electrical installation of a building

摘要

A power control device for an electrical installation of a building, comprising: at least one power generation unit connector for connecting to at least one power generation unit for generating energy from renewable sources; an energy storage unit for storing energy and for supplying stored energy; an electrical load connector for connection to at least one electrical load of the electrical installation; a power grid connection unit for connecting the at least one electrical load to a power grid, for drawing energy from the power grid and for feeding energy into the power grid; a main meter for measuring the amount of energy drawn from the power grid and fed into the power grid; the electrical load connector being connected to the power grid connection unit through a junction, the power grid connection unit being connected to the junction by an electrical conductor; a power meter for measuring the sum of energy being supplied by the at least one power generation unit connector and the energy storage unit to the junction; the at least one power generation unit connector and the energy storage unit being connected via the power meter to the junction; a current sensor electromagnetically coupled to the electrical conductor at a sensing position between the main meter and the junction without direct electrical connection to the electrical conductor for creating a current sensor signal; and a power management unit connected to the current sensor for receiving the current sensor signal, the power management unit being adapted for controlling the energy flow between the at least one power generation unit connector, the energy storage unit, the electrical load connector and/or the power grid connection unit at least based on the current sensor signal.