A high-reliability multiphase power supply system and method. A second processing unit is configured with a first field-effect transistor, a drain electrode of the first field-effect transistor is connected to a power supply, a source electrode of the first field-effect transistor is connected to the drain electrode of a second field-effect transistor, the source electrode of the second field-effect transistor is connected to ground, and the gate electrodes of the first field-effect transistor and the second field-effect transistor are connected to a first processing unit; the second processing unit is configured with a first current detection module and a second current detection module, the first current detection module and the second current detection module are electrically connected to a bus unit, and the bus unit is electrically connected to a substrate management controller.

An electrical energy supply device for supplying electrical energy to electrical components from an energy source, the energy supply device including at least one program memory with a computer program stored therein, and a computer for running the computer program, the computer program including software control functions for controlling power supply functions of the energy supply device, characterized in that the energy supply device includes at least one electronic overcurrent circuit breaker implemented in software with the aid of the computer program.

A time alignment method for a differential protection device, the differential protection device and a differential protection system are disclosed. The time alignment method includes obtaining a plurality of current sampled values and a count value of each current sampled values; resampling the plurality of current sampled values with sampling frequency of J points/cycle to obtain a plurality of current resampled values; and performing Fourier transform on the plurality of current resampled values to obtain a plurality of temporally arranged current Fourier values, the plurality of current Fourier values includes a reference current Fourier value corresponding to the sampling moment of the current sampled value whose count value is the first value in the plurality of current sampled values, and the reference current Fourier value is determined based on the reference current resampled value and the J−1 current resampled values that temporally arranged before the reference current resampled value.

Methods, devices and systems for detecting an anomaly in a power network are described. A method for detecting an anomaly in a power network includes determining a baseline power usage in the power network, receiving data indicative of an active power usage in the power network, detecting an anomaly based on a difference between the baseline power usage and the active power usage, isolating a fault for an element in the power network, responsive to detecting the anomaly, and transmitting fault isolation information indicating the fault to a user device. Related devices and systems may perform operations of the method described herein.

A circuit interrupting device including a line terminal, a wideband current sensor configured to measure a current flowing through the line terminal, a zero cross detection circuit configured to measure a voltage and frequency of the line terminal, and a microcontroller including an electronic processor. The microcontroller is configured to apply a digital filter to a line current measurement signal received from the wideband current sensor and estimate spectral density of the filtered line current measurement signal. The microcontroller is further configured to calculate an arcing characteristic based on the spectral density, determine whether an arc fault is present within the circuit interrupting device based on a comparison of the arcing characteristic to one or more thresholds, and activate an interrupting device when an arc fault is present.

A system comprising a meter and a circuit breaker, the electricity meter comprising: a primary processing component designed to acquire a primary power supply parameter and to produce, from the primary power supply parameter, a primary command intended to control the opening or closure of a line; a primary transceiver designed to transmit the primary command; the circuit breaker comprising: a disconnection unit; a bistable relay designed to open or close the disconnection unit; a secondary receiver designed to receive the primary command; a secondary processing component designed to acquire the primary command and to control the bistable relay so as to open or close the disconnection unit on the basis of the primary command.

An item of electrical equipment has a preprocessing device for digital measured values. The preprocessing device has an integrated circuit and an electronic memory chip that contains a configuration of a logic circuit. If a fault of the preprocessing device is identified, an operation of the preprocessing device is interrupted until the configuration of the logic circuit has been loaded from a configuration memory chip into the electronic memory chip. There is also described a method for rectifying device faults, such as by reloading a configuration of a logic circuit into an electronic memory chip of a preprocessing device.

A fault detection system has line current monitors. Each line current monitor couples to a line-phase of an electric power transmission system. Each line current monitor has a phase detector, a loop filter and a controlled oscillator, coupled as a phase locked loop. The phase detector has a rotating frame transform. The phase detector couples to a line-phase and provides in-phase and quadrature signals in a rotating frame, based on in-phase and quadrature signals proportional to current in the line-phase. One or more fault detection modules are coupled to the line current monitors through inter-phase communication of the in-phase and quadrature signals in a time frame rotating at the line frequency. The communication may have electrical isolation.

The present invention are a system and a method for controlling solar photovoltaic power generation on the basis of machine learning, the system comprising: solar photovoltaic modules; node control units for switching off a connected solar photovoltaic module when measured current, voltage and power data do not satisfy control data; a gateway unit for storing measured data; a real-time control module for classifying, comparing and analyzing data and storing same, and transmitting a control command to the gateway unit; and machine learning for monitoring a device and data, learning on the basis of machine learning, and extracting functional data required for controlling solar photovoltaic power generation so as to provide control service data according to the result of performed modeling.

The present disclosure is directed to a single-phase reclosing method, device and storage medium for AC/DC system. The method comprises: acquiring three-phase voltages at inverter-side AC bus close to the transformer, three-phase currents measured at the outlet of inverter-side AC line and three-phase voltages at inverter-side AC bus far from the transformer; calculating the energy calculation value and energy operation value of the fault line; identifying the fault nature of fault line within the maximum time delay, according to the energy calculation value and energy operation value of fault line and an energy criterion of transient/permanent fault; issuing a reclosing control signal based on the fault nature of fault line to realize effective reclosing of the fault line.