The method for determining mutual voltage sensitivity coefficients between a plurality of measuring nodes of an electric power network does not rely on knowledge of the network parameters (for example: series conductance and susceptance of the branches, shunt conductance and susceptance of the nodes, etc.). The method uses a monitoring infrastructure including metering units at each one of the measuring nodes, and includes a step of measuring at the same time, at each one of the measuring nodes, repeatedly over a time window, sets of data including values of the current, the voltage, and the phase difference, a step of computing active power, reactive power and values from each set of measured data, and a step of performing multiple parametric regression analysis of the variations of the voltage at each one of the measuring nodes.

A current measurement device (1 to 3) includes a first sensor (SE1) configured to detect a direct current magnetic field and a low-frequency alternating current magnetic field generated by a current (I) flowing through a measurement target conductor (MC), a hollow magnetic shielding member (12) that includes a cutout portion (CP2) into which the measurement target conductor is inserted and in which the first sensor is accommodated, a fixing mechanism (13) configured to fix the measurement target conductor such that a distance between a center of the measurement target conductor inserted into the cutout portion of the magnetic shielding member and the first sensor is a predetermined reference distance (r), and a first calculator (21) configured to calculate a current flowing through the measurement target conductor based on a detection result of the first sensor.

A method for monitoring a power line that carries electrical current, using a mobile inspection device, the mobile inspection device has a magnetic sensor and a camera, the method includes the following steps: measuring a magnetic field generated by the current, by the magnetic sensor; and capturing an image of the power line by the camera according to the measured magnetic field. A mobile inspection device, a computer program and a machine-readable storage medium implement the method.

A sensor probe includes a body having first and second channels that are spaced apart and extend through the body approximately parallel to each other. A first end of a Rogowski coil is fixed within the first channel. The Rogowski coil passes through the second channel and loops back to the first channel where a second end of the Rogowski coil is selectively insertable into the first channel opposite the first end of the Rogowski coil. A non-contact sensor coupled to the body is positioned between the first and second channels to measure a parameter of an insulated conductor situated within the loop formed by the Rogowski coil. The size of an interior region within the loop is selectively adjustable by sliding movement of the Rogowski coil within the second channel.

A radiation hardened current sensor to sense direct current (DC), low frequency alternating current (AC), and high frequency AC includes a DC current transformer (DCCT) including a primary DCCT winding and a secondary DCCT winding. A self-oscillating modulator is coupled to the secondary DCCT winding of the DCCT to maintain a magnetic flux density of the DCCT at an upper limit and a lower limit of a magnetic hysteresis characteristic of the DCCT. An active filter passes only the DC and the low frequency AC from the DCCT as an output. An AC current transformer (ACCT) including a primary ACCT winding and a secondary ACCT winding. The output of the active filter is coupled to the ACCT and the secondary ACCT winding provides the high frequency AC.

A multi-sensor, real-time, in-process current and voltage estimation system is disclosed including sensors, affiliated hardware, and data processing algorithms that allow accurate estimation of currents and voltages from magnetic and electric field measurements, respectively. Aspects of the system may be embodied in a detector that is readily attachable to conductors of an energized system for contactless current and/or voltage sensing of the conductors without requiring the conductors to be disconnected from the energized system.

A capacitive voltage sensor assembly includes a first electrode extending along a longitudinal axis, a second electrode surrounding a portion of the first electrode and positioned radially outward from the longitudinal axis and the first electrode, the second electrode including a flexible tubular portion, and a mass of dielectric insulating material at least partially encapsulating the first electrode and the second electrode. The flexible tubular portion is configured to move during solidification of the mass of dielectric resin, and the mass of dielectric resin fills through openings formed in the second electrode and forms a unitary insulating carrier structure for the first electrode and the second electrode.

A method for monitoring a power line that carries electrical current, using a mobile inspection device, the mobile inspection device has a magnetic sensor and a camera, the method includes the following steps: measuring a magnetic field generated by the current, by the magnetic sensor; and capturing an image of the power line by the camera according to the measured magnetic field. A mobile inspection device, a computer program and a machine-readable storage medium implement the method.

A capacitive voltage sensor assembly includes a first electrode extending along a longitudinal axis, a second electrode surrounding a portion of the first electrode and positioned radially outward from the longitudinal axis and the first electrode, the second electrode including a flexible tubular portion, and a mass of dielectric insulating material at least partially encapsulating the first electrode and the second electrode. The flexible tubular portion is configured to move during solidification of the mass of dielectric resin, and the mass of dielectric resin fills through openings formed in the second electrode and forms a unitary insulating carrier structure for the first electrode and the second electrode.

Provided is a sensor in which a current sensor that detects a current of a power line as a change in a magnetic field and a voltage sensor that detects a voltage of the power line using capacitive coupling are integrally formed. The transmission of signals related to substantially the same sections is omitted in order to effectively compress an output signal from the sensor and an output signal from the voltage sensor. When the amplitude and phase of a fundamental wave which are estimated from the output signal from the sensor and the amplitude and phase of harmonics are encoded, the amplitude and phase of the harmonics are relativized with a value for the fundamental wave.