VOLTAGE SENSING STRUCTURE

The invention relates to a voltage sensing structure for a three-phase power line system, the voltage sensing structure comprising a first field sensor configured to sense an electric field at a first line of voltage, a second field sensor configured to sense an electric field at a second line of voltage, a third field sensor configured to sense an electric field at a third line of voltage, and at least one ground field sensor being configured to sense an electric field at a respective ground potential electrode, wherein the three-phase voltages are determined based on electric fields sensed by the first field sensor, the second field sensor, the third field sensor, and the at least one ground field sensor, and a plurality of sensitivity coefficients corresponding to electric field effects from each of the first line voltage, the second line voltage, and the third line voltage to each of the first field sensor, the second field sensor, the third field sensor and the at least one ground field sensor.