摘要:
A line device monitors at least one power parameter of an electric power line and produces at least one representation thereof. The at least one representation is communicated to a microprocessor based device. The representation is compared with a measurement of the at least one power parameter produced by legacy instrumentation.
摘要:
Systems and methods for reclassifying instrument transformers. A line mounted device that includes a sensor that can be attached to a power line. The line mounted device generates data or representations of the power parameters of the power line. A processor in the line mounted device produces modified representations of the power parameters that are transmitted wirelessly to a microprocessor based device. The microprocessor based device also receives second representations of the power parameters from legacy instrumentation. Compensation data is produced based on the modified representations from the line mounted device and the second representations from the legacy instrumentation. The compensation data can be used to compensate or correct the representations of the power parameters from the legacy instrumentation even after the line mounted device is no longer attached to the power line.
摘要:
An intelligent electronic device (IED) for monitoring at least one power parameter in a power system is disclosed. The IED comprises at least one voltage input operative to be coupled with at least one power line in the power system and operative to sense at least one voltage in the power system. The IED further comprises at least one current input operative to be coupled with the at least one power line and operative to sense a current flowing through the at least one power line. The IED further comprises at least one analog to digital converter coupled to the voltage input and the current input and operative to produce digital samples indicative of the voltage and current. The IED further comprises a processor coupled with the at least one analog to digital converter and operative to calculate the at least one power parameter. The IED further comprises a power supply operative to supply power to the IED. The IED further comprises a transceiver operative to communicate at least one data packet comprising the at least one power parameter via time domain pulses of RF energy occupying a wide range of frequencies and an antenna coupled with the transceiver operative to transmit the RF data packet.
摘要:
An apparatus for sensing the current in a power line of a power system and systems incorporating the apparatus are disclosed. The apparatus may comprise an enclosure providing a window operable to permit the passage of the power line therethrough. The apparatus may further comprise an active current transformer set within the enclosure and operative to produce a scaled version of the current. The apparatus may further comprise an amplifier coupled with the active current transformer and operative to reduce the phase shift and ratio error between the current and the scaled version of the current. The apparatus may further comprise a powering current transformer set within the enclosure and operative to receive power from the power line on a primary winding and deliver power on a secondary winding. The apparatus may further comprise power supply circuitry set within the enclosure, the power supply circuitry powered through the secondary winding from the powering current transformer and operative to supply power to the amplifier. The apparatus may further comprise at least one of secondary leads and secondary terminals extending from the enclosure, coupled with the active current transformer and operative to deliver the scaled version of the current outside of the enclosure.
摘要:
Devices that couple to high voltage transmission lines obtain power themselves using the body capacitance of an element of the devices. The devices generate a comparatively lower voltage from the current flowing between the high voltage line and the element of the device that generates the body capacitance. The devices can be used to operate sensors that monitor the transmission lines or parameters of the power distribution system, such as current, line temperature, vibration, and the like. The devices can also be used as indicators, such as aircraft warning lights, information signs, etc. In addition, the devices can operate as RF transmission/reception or repeater devices, radar devices, mesh networking nodes, video/audio surveillance, sound emitting devices for scaring animals, drones that traverse the power line, etc. Because the devices operate in response to line voltage rather than current, the devices are reliable even in low current conditions.
摘要:
An electric power meter is disclosed which includes an analog to digital converter for converting sensed voltage and/or current signals to digital signals corresponding thereto. The meter further comprises storage for storing the digital signals. The meter further comprises a processor for performing power calculations upon the digital signals, and converting the calculations and the digital signals into at least one network protocol. The meter further comprises a network interface for interfacing with an external network. A system for modifying the functionality of the electric power meter is also disclosed.
摘要:
An electric power meter is disclosed. The meter comprises means for digitally sampling voltage and current. The meter further comprises means for storing the digitally sampled voltage and current. The meter further comprises means for performing power calculations upon the digitally sampled voltage and current, and converting the calculations and the digitally sampled voltage and current into at least one network protocol. The meter further comprises means for interfacing with an external network. A system for modifying the functionality of the electric power meter is also disclosed.
摘要:
A power management integrated circuit for monitoring a parameter of a power system includes: an analog front end operative to receive and at least one of amplify, attenuate and filter analog signals representative of at least one of voltage and current in a power system to produce modified analog signals; an analog to digital converter operative to produce digital signals; the logic coupled with the analog to digital converter operative to receive the digital signals and produce a power parameter and the logic includes a processor core; a random access memory coupled with the logic operative to store the power parameter and the logic is operative to implement a setpoint to detect when the power parameter is outside a determined range; and a digital output coupled with the first logic and the digital output is useable to control a switching circuit outside the power management integrated circuit.
摘要:
A system for modifying the functionality of intelligent electronic devices installed and operating in the field is disclosed. Each of the intelligent electronic devices operates with a software configuration to monitor electrical energy. A copy of the software configurations may be maintained in a database. Changes to the operation of one or more of the intelligent electronic devices may be made as a function of modifications to the database.
摘要:
An electric power meter is disclosed. The meter comprises means for digitally sampling voltage and current. The meter further comprises means for storing the digitally sampled voltage and current. The meter further comprises means for performing power calculations upon the digitally sampled voltage and current, and converting the calculations and the digitally sampled voltage and current into at least one network protocol. The meter further comprises means for interfacing with an external network. A system for modifying the functionality of the electric power meter is also disclosed.