Systems and techniques that facilitate automated validation of power topology are provided. In various embodiments, a control component can transmit a transition command to a power-distribution node of a data center, wherein the transition command can cause an outlet of the power-distribution node to transition between power states. In various aspects, a verification component can verify that a power-consumption node of the data center is connected to the outlet by comparing a pre-transition power characteristic of the power-consumption node with a post-transition power characteristic of the power-consumption node.

A method of estimating power usage in an electricity distribution apparatus for a plurality of electrical loads, the electricity distribution apparatus comprising an electrical circuit including a plurality of branch circuits arranged in parallel, each branch circuit being coupled to one or more of the plurality of electrical loads, the electrical distribution apparatus being configured to distribute electrical power, received via a supply line from a supply of electrical power, across the electrical circuit, the method comprising: measuring voltage across at least one of the plurality of branch circuits; measuring current in a monitored branch circuit of the plurality of branch circuits; and detecting a first type of load change event if there is a change in the measured current and a corresponding change in the measured voltage, wherein the change in the measured current and the corresponding change in the measured voltage correspond to a change of load.

A system for alert of energy resource outages includes: a resource monitor, disposed within radio range of resource meters that each transmit corresponding radio signals indicative of corresponding meter identifiers and current readings, configured to: determine whether the corresponding radio signals are fixed frequency or frequency hopping by scanning frequency channels for a time period and counting hits of desired meter identifiers; decode each of the one or more of the corresponding radio signals of the resource meters according to determined protocol to obtain one or more of the corresponding meter identifiers and current readings; and transmit the one or more of the corresponding meter identifiers and current readings; and a server, configured to: receive the one or more of the corresponding meter identifiers and current readings; employ the corresponding meter identifiers and current readings to detect an outage; and transmit an alert that corresponds to the outage.

A method of monitoring a parameter of an electrical network includes using sensors to measure a value of a parameter of the electrical network during each sampling period within a selected time section. During each iteration of a plurality of iterations of a sliding window algorithm, wherein within each of the iterations a starting time of a sliding window of the sliding window algorithm within the selected time section is incremented by a selected increment, an average of the measured parameter values over the duration of the sliding window for each of the starting times is calculated. The duration of the sliding window in each iteration is different from the duration of sliding windows in other iterations. A representative value of the calculated averages of the parameter is calculated for each iteration. An alert is issued if indicated by the representative value.

Provided are embodiments for circuit for detecting an open-wire condition for a differential input. Embodiments include a sensor, and a line replaceable unit (LRU) coupled to the sensor, wherein the LRU comprises a differential amplifier to provide a sensor output. Embodiments can also include a synchronous demodulator coupled to an output of the differential amplifier through an alternating current (AC) coupling network, wherein the synchronous demodulator is configured to receive the differential amplifier output and a reference signal at the synchronous demodulator signal input and reference input, and provide a synchronous demodulator output voltage to indicate an open-wire condition. Also provided are embodiments of a method for detecting an open-wire condition for a differential input.

A voltage measurement device includes a probe module movably arranged around an alternating-current transmission line, and a measurement unit. A metal electrode is arranged on a surface of the probe module facing toward the alternating-current transmission line, electrically coupled with the alternating-current transmission line to form a coupling capacitor, and then forms an electrical circuit with an inductor element, a resistor element, and a reference signal source in the measurement unit. A processor controls the reference signal source to input reference voltage signals at different frequencies to the electrical circuit, determines a resonant frequency of the electrical circuit according to currents of the electrical circuit under the reference voltage signals at different frequencies, and determines a voltage of the alternating-current transmission line according to a first current component amplitude and the resonant frequency of the electrical circuit. A voltage measurement method and a storage medium are also disclosed.

A computer system that includes a processor device and a storage device is configured to determine a base load at a utility customer site using power usage data for the utility customer site, to determine a variable load at the utility customer site during a range of temperature independent days using the power usage data, and to determine a temperature dependent load at the utility customer site that exceeds the variable load and the base load using the power usage data. The computer system is further configured to assign a flag to each time interval that the temperature dependent load exceeds a power usage threshold and to determine if the utility customer site has an equipment malfunction based on a number of the flags assigned within a time period.

Method and system for evaluating an input voltage of a power supply or a switched-mode power supply, wherein the input voltage has a constant polarity, where a digitized input voltage is supplied as the input signal to a filter which is filtered such that an output signal from the filter lags the input signal of the filter at the input of the filter, where the input signal and the output signal of the filter are compared, where comparison results are evaluated during an evaluation period until, following a first change in state of a comparison result, a further change in state of the comparison result is identified, and where a respective evaluation period is then terminated and subsequently, a period duration and/or a frequency of an AC voltage component of the input voltage are determined using the present count value of a counter.

Embodiments of this present disclosure include an input/output (IO) power supply module coupled to a load. The IO power supply module may include testing circuitry that couples to a voltage supply of the IO power supply module. The testing circuitry may perform an online load current test to verify performance of IO power supply module. To do so, the testing circuitry may include a current measurement circuit coupled to a switch. The current measurement circuit may receive a current via the switch while closed to determine whether the output current generated by the voltage supply is equal to a rated output current.

Systems and methods for non-intrusive program tracing of a device are disclosed. The methods involve generating a program trace signal from at least one of power consumption and electromagnetic emission of the device; digitizing and decomposing the program trace signal into at least two digital program trace component signals including a low frequency program trace component and one or more high frequency program trace component signals; classifying fragments of the at least two digital program trace component signals of the program trace signal as at least one of a known portion of program code and an observed behavior of the device. Each of the at least two digital program trace component signals have different frequency bands and the bandwidth of each program trace component signal is smaller than the bandwidth of the program trace signal. Each of the high frequency program trace component signals include an envelope.