The present disclosure relates to a driving apparatus for a reclosing apparatus and a driving method thereof. The driving apparatus comprises a first energy storage unit, a timing unit, a control unit, and a first power supply unit, a second energy storage unit and a driving unit. The timing unit outputs a first enable signal; the control unit outputs a second enable signal or a third enable signal; the first power supply unit enables the second energy storage unit to receive the power when receiving the second enable signal, and enables the second energy storage unit to discharge when receiving the third enable signal; the second energy storage unit receives and stores the power via the first power supply unit; and the driving unit provides the power stored in the first energy storage unit to the reclosing apparatus when a predetermined condition is satisfied.

A fault detection system that that prevents a recloser from reclosing if a fault is determined to be internal to a transformer, where the recloser is configured to perform a reclosing operation in response to detecting overcurrent. The recloser includes a sensor, such as a light sensor, directed towards the transformer and detecting a fault event. If the recloser detects overcurrent, but the sensor does not detect the fault event, it is assumed that the fault is internal to the transformer and the recloser is prevented from reclosing.

A controller protection circuit for a voltage power optimiser. The circuit having: a first terminal for connecting to a first end of a winding in the voltage power optimiser; a second terminal for connecting to a second end of the winding in the voltage power optimiser; and a thyristor. The controller protection circuit also includes a thyristor gate control circuit. The thyristor gate control circuit is configured to: set the gate control signal such that the thyristor is configured to conduct in response to a potential difference between the anode terminal and the cathode terminal of the thyristor; and set the gate control signal such that the thyristor is configured not to conduct in response to a signal received from a voltage controller. The thyristor gate control circuit includes a normally-on switch having a conduction channel and a control terminal, and a photovoltaic isolator configured to set the gate control signal such that the thyristor is configured not to conduct in response to a signal received from a voltage controller.

In one aspect, a hybrid circuit protection device for current-limiting a fault current between a source and a load during a fault is provided. The hybrid circuit protection device includes an input configured to couple to the source, an output configured to couple to the load, a return configured to couple the source to the load, a main switch configured to selectively couple the input to the output, a switching network coupled in parallel with the main switch, and a controller. The controller is configured to determine that the main switch has opened in response to the fault current, where the fault current has an initial value, and activate the switching network to current-limit the fault current to less than the initial value during the fault.

Methods and systems for self-healing fault recovery in an electrical power distribution network, particularly distribution networks employing a mesh configuration. When a power source circuit breaker is tripped one or more virtual paths is traced throughout the mesh network, each virtual path originating at the power source that is offline, terminating at an alternate power source, and containing one or two open load switches. A restoration path is chosen from the virtual paths. Power can be transferred to other segments of the mesh network by isolating the fault and closing the open load switch in the chosen restoration path. Some or all of the method and system can be automated.

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.

The invention relates to an energy supply module (1) comprising an input gate (2) for connection to a power source (4) and an output gate (3) as an interruption-free power supply, wherein the input gate (2) and the output gate (3) are through-connected separably via an electrical separating device (6), and an auxiliary energy source (10) is connected or can be connected in parallel with the input gate (2) and the output gate (3), wherein the separating device (6) is positioned between the auxiliary energy source (10) and the input gate (2), and the separating device (6) comprises a circuit arrangement having two transistors (15) and two diodes (16), wherein the transistors (15) are connected reversely in series, and a diode (16) is connected to each transistor (15), inversely to the current direction of said diode.

A power supply switching device and switch board checks whether or not a primary-side voltage of a remote shutoff breaker and a secondary-side voltage thereof become a rated voltage after a commercial power system is recovered from a blackout. Next, when both primary-side voltage and secondary-side voltage become the rated voltage, a contactor is actuated to interconnect a home power system with the commercial power system. Hence, charging of the home power system without causing a user to notice such a charging upon recovery of the commercial power system from a blackout can be prevented. As a result, the safety for the user can be ensured.

An electronic circuit breaker contains a first semiconductor switch which is switched into a current path between a voltage input and a load output and contains a controller which is connected to the control input of the first semiconductor switch. The first semiconductor switch is actuated depending on an actual value of the load current, the actual value is supplied to the controller, and the controller is configured to limit the current of the first semiconductor switch and disconnect same.

A method includes energizing a transformer from a deenergized state by turning on a solid-state transfer switch to conductively couple a power source on a first side of the solid-state transfer switch and a transformer on a second side of the solid-state transfer switch, and evaluating an inrush current to the transformer from the power source. The method includes turning off the solid-state transfer switch to conductively decouple the power source and the transformer in response to the inrush current meeting a first criterion, determining a recoupling timing for the solid-state transfer switch, and turning on the solid-state transfer switch in response to the recoupling timing effective to complete energization of the transformer with the inrush current to the transformer being limited by the first criterion.