| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a device for current detection of power transmission/distribution lines and for analysis of the electrical conditions thereof, capable of accurately detecting a transmission/distribution line current of a phase to be detected by each of sensors disposed in a non-contacting manner at positions for surely keeping a safe distance from the respective power transmission/distribution lines of a three-phase three-wire system, capable of accurately detecting a transmission current of each phase even in multi-channel transmission lines in particular, and capable of monitoring the electrical conditions of the transmission/distribution wireways and their change, such as variations (increases, decreases) in transmission/distribution currents, power interruption work, electrical failures (ground faults, short circuits, etc.). SOLUTION: This device is equipped with the plurality of magnetometric sensors disposed in a non-contacting manner at the respective power transmission/distribution lines of a three- phase three-wire system to each generate a detection output that is a function of current flowing through each line and of the distance to the line, a matrix memory for storing a constant matrix previously set as a function of the distance from each sensor to the line of each phase and of the detection characteristic of each sensor, and a constant matrix multiplication means for computing the currents flowing through the lines of the respective phases, by multiplying a detection output matrix of the sensors with the constant matrix.</p> |
