A current monitor for a transmission line having powered active components is provided. A current monitor includes: a housing configured to be coupled to a transmission line, an inductive current sensor in the housing configured to measure a value of the current on the transmission line to generate a sensor signal, a power source, and a sensor signal conversion circuit in the housing configured to receive power from the power source and to generate a current output signal based on the sensor signal, the current output signal having a natively useful form.

The invention relates to a coupling for electrically and mechanically connecting medium-voltage or high-voltage components, in particular for voltages of 1 kV to 52 kV, comprising a first connecting piece for mechanically and electrically connecting a medium-voltage or high-voltage component, in particular for connecting to a complementary connecting piece of a bushing of a switchgear cabinet, and a second connecting piece for mechanically and electrically connecting another medium-voltage or high-voltage component, in particular for connecting to a complementary connecting piece of an electrical cable, wherein the two connecting pieces of the coupling belong to complementary connection types, which fit together mechanically, and comprising a low-resistance current sensing resistor, which is built into the coupling and electrically connected between the first connecting piece and the second connecting piece in order to measure a current flow between the first connecting piece and the second connecting piece.

A system and method for providing power to and monitoring the energy usage includes at least one electrical control unit having an unmanned vehicle, at least one electrical control unit, a sensor enabled to monitor a given condition; a power source; a processor configured to be in communication with the at least one sensor and said power source, said processor further configured to manage communications with said management system; an unmanned vehicle releasably coupled to said electrical control unit, said processor being adapted to release said unmanned vehicle to enable the unmanned vehicle to separate from said electrical control unit, wherein said sensor is enabled to monitor at least one of the following: voltage, current, real power, apparent power, reactive power, frequency, total harmonic distortion, arc fault, plug loads, power factor, GFI, AFI, light, temperature, humidity, methane, carbon monoxide, motion, thermal, occupancy, radio frequency, audio, video, infrared, and combinations thereof and wherein said unmanned vehicle can travel to various locations.

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 system for monitoring current and voltage from a power source or load at the tap wire connected to an overhead distribution power line, the distribution power line being spaced apart from the ground is provided. The system includes a current clamp sensor coupled to the tap wire and spaced apart from the distribution power line. A sensor is insulated body coupled to the current clamp, the sensor body being configured to simultaneously measure voltage on the overhead distribution power line and current of the tap wire prior to the distribution power line. A mounting assembly is provided that suspends the sensor from the distribution power line, the mounting assembly being coupled between the distribution power line and the current clamp.

A current sensor with an electrical conductor which has a first connection and a second connection for contacting a power circuit of a vehicle, and with a first and a second current measurement device for detecting at least one measurement value for the current flowing over the electrical conductor, and with a first evaluation circuit which is connected to the first and/or the second current measurement device and can receive the measurement values of the first and/or the second current measurement device and output a current measurement signal depending on the measurement values, and with a second evaluation circuit.

Power distribution networks need to monitor the electrical power at points around the network. A unit which senses the electrical characteristics of the network can also sense other environmental characteristics of the electrical network at that location. An electrical sensor unit attachable to an insulated electrical distribution cable comprises at least one electrical sensor for at least one of current, voltage, and phase angle of electrical power being transmitted in the cable, a source of electrical power for driving the electrical sensors, and a socket for receiving an environmental sensor and comprising connections for the source of electrical power. The unit comprises an annular body defining an axial passage through which an electrical conductor can pass, the annular body housing an electrical sensor in the form of a current sensor including a loop extending around the axial passage.

A capacitive voltage sensor assembly includes a first electrode extending along a longitudinal axis, a tubular section surrounding a portion of the first electrode and positioned radially outward from the longitudinal axis and the first electrode, the tubular section including an insulating layer, an inner conductive layer, and an outer conductive layer, and a mass of dielectric insulating material at least partially enclosing the first electrode and the tubular section. The mass of dielectric insulating material fills through openings formed in the tubular section.

A monitoring system for sensing electrical parameters including current and voltage can comprise a current transformer and an antenna. The current transformer can be configured to sense current passing through a conductor. The antenna can be configured to sense electrical potential of the conductor by sensing an electric field generated by the conductor. The antenna can sense the electrical potential independent of whether current is present in the conductor. The monitoring system can further comprise a temperature sensor configured to sense a temperature of the conductor. A sensing module can include a housing supporting the current transformer, the antenna, and the temperature sensor for monitoring an electrical power circuit.

This invention discloses a controller and method for a cyber synchronous machine (CSM, in short, cybersync machine), namely, a power electronic converter that is seamlessly equipped with computational algorithms (i.e., the controller) to represent the intrinsic and fundamental principles of physical synchronous machines. The CSM can be operated in the grid-connected mode or the islanded mode to take part in the regulation of the frequency and the voltage. The controller also includes auxiliary blocks to achieve self-synchronization without measuring or estimating the grid frequency and the regulation of real power and reactive power to the given reference values without static errors. The control signal for the power electronic converter can be the output voltage generated by the engendering block or the sum of the output voltage and the virtual current. A unique feature of the disclosed CSM is that, if the system it is connected to is passive, then the whole system is passive and, hence, is guaranteed to be stable.