Abstract: Systems, methods, and computer-readable media are disclosed for impedance-based broken conductor detection in electric distribution systems. Upon the detection of a broken conductor, the affected overhead line will be de-energized before it hits the ground. An example method may include determining, during a first time period, a first impedance value measured by a first IED, and may further include determining, during a second time period that after the first time period, a second impedance value measured by the first IED. The method may further include determining a first ratio based on dividing a difference between the first impedance value and the second impedance value by the first impedance value, and may further include determining that the first ratio deviates from a threshold setpoint, and determining that a broken conductor condition occurs based on the first ratio deviating from the threshold setpoint.

Abstract: Systems, methods, and computer-readable media are disclosed for high-speed falling conductor protection in electric distribution systems. An example method may include calculating, by a processor, at a first time, and for each phase, one or more first impedance values associated with one or more terminals of a transmission line. The example method may also include calculating, by the processor, at a second time, and for each phase, one or more second impedance values associated with the one or more terminals. The example method may also include determining, by the processor, that a rate of change of an impedance of the one or more terminals is greater than a threshold rate of change. The example method may also include determining, by the processor and based on the determination that the rate of change of the one or more terminals is greater than the threshold rate of change, that the transmission line has broken.

Abstract: Systems, methods, and computer-readable media are disclosed for impedance-based broken conductor detection in electric distribution systems. Upon the detection of a broken conductor, the affected overhead line will be de-energized before it hits the ground. An example method may include determining, during a first time period, a first impedance value measured by a first IED, and may further include determining, during a second time period that after the first time period, a second impedance value measured by the first IED. The method may further include determining a first ratio based on dividing a difference between the first impedance value and the second impedance value by the first impedance value, and may further include determining that the first ratio deviates from a threshold setpoint, and determining that a broken conductor condition occurs based on the first ratio deviating from the threshold setpoint.

Abstract: Some embodiments disclosed herein include systems and method for verifying meter accuracy. The system may include an electric vehicle charging station that includes a submeter that measures an amount of energy discharged from the electric vehicle charging station and to a connected electric vehicle. A meter test device may also be connected to the electric vehicle charging station to determine the accuracy of the submeter in local time.

Abstract: Some embodiments disclosed herein include systems and method for verifying meter accuracy. The system may include an electric vehicle charging station that includes a submeter that measures an amount of energy discharged from the electric vehicle charging station and to a connected electric vehicle. A meter test device may also be connected to the electric vehicle charging station to determine the accuracy of the submeter in local time.

Abstract: Some embodiments disclosed herein include systems and method for verifying meter accuracy. The system may include an electric vehicle charging station that includes a submeter that measures an amount of energy discharged from the electric vehicle charging station and to a connected electric vehicle. A meter test device may also be connected to the electric vehicle charging station to determine the accuracy of the submeter in local time.

Abstract: Some embodiments disclosed herein include systems and method for verifying meter accuracy. The system may include an electric vehicle charging station that includes a submeter that measures an amount of energy discharged from the electric vehicle charging station and to a connected electric vehicle. A meter test device may also be connected to the electric vehicle charging station to determine the accuracy of the submeter in local time.

Abstract: An electronic device configured to switchover power from a primary source to an alternate source to maintain continuity of power supplied to a load bus. The electronic device includes one or more processors configured to identify availability of the alternate source using source monitoring in order to measure and calculate a tracking frequency for controlling a variable sampling interval of the one or more processors. The processors are configured to store signal samples and associated time stamps into a variable length buffer and store new sample values and associated new time stamps into the fixed length buffer. The processors are configured to determine attributes from samples of the alternate source using the tracking frequency. The processors are configured to execute a source switchover signal when the primary source is unavailable based by comparing load bus attributes to alternate source attributes at an estimated instance of switchover.

Abstract: An electronic device configured to switchover power from a primary source to an alternate source to maintain continuity of power supplied to a load bus. The electronic device includes one or more processors configured to identify availability of the alternate source using source monitoring in order to measure and calculate a tracking frequency for controlling a variable sampling interval of the one or more processors. The processors are configured to store signal samples and associated time stamps into a variable length buffer and store new sample values and associated new time stamps into the fixed length buffer. The processors are configured to determine attributes from samples of the alternate source using the tracking frequency. The processors are configured to execute a source switchover signal when the primary source is unavailable based by comparing load bus attributes to alternate source attributes at an estimated instance of switchover.