Di Bernardo, Antonio

A swivel connecting device (10) comprising at least one connecting element (11), which in turn comprises a first eyelet-shaped portion (11a), and a pair of half-shells (12) between which the at least one connecting element (11) is housed with the first eyelet-shaped portion (11a) protruding externally from a volume delimited by the pair of half-shells (12) and in a rotatable manner around a development axis (A), wherein a second portion (11b) shaped like an elongated stem along the development axis (A) extends from the first eyelet-shaped portion (11a) of the at least one connecting element (11) between the half-shells (12), wherein the connecting element (11) comprises a third enlarged portion (11c) at a free termination of the second portion (11b), the third enlarged portion comprising at least one surface (11c') developing transversal to the development axis (A), wherein each half-shell of the pair of half-shells (12) comprises a respective through opening, wherein each opening defines a seat (14) in which it engages the at least one transversal surface (11c') of the enlarged portion (11c) of the connecting element (11).

A grid-connection point control method for a photovoltaic power station and a photovoltaic power station is provided. The grid-connection point control method for the photovoltaic power station includes: obtaining sampled electrical signal collected by respective electricity meters; determining target power corresponding to a target device among the at least one device that is connected to a target branch circuit among the one or more branch circuits, based on a first sum of the sampled electrical signals, a first power reference value corresponding to the target branch circuit, and a first capacity of the target device; and controlling the target device based on the target power.

Provided are a power supply circuit, a power supply device, and a power supply system, which belong to the field of power supply technologies. The power supply circuit includes: a bus; a first branch having a first end electrically connected to the bus, and a second end electrically connected to a first port; a second branch having a first end electrically connected to the bus, and a second end electrically connected to a second port; a plurality of third branches, each of the plurality of third branches having a first end electrically connected to the bus, and a second end electrically connected to a corresponding one of power ports, and each of the plurality of third branches being provided with a first switch; and a control circuit connected to a drive terminal of the first switch, the control circuit being configured to control the first switch to be turned on or off. Each of the first port and the second port is configured to be connected to a load or an inverter. Each of the power ports is configured to be connected to a power grid or a power source. Therefore, a supply power of the power supply circuit can be increased to meet a power demand of the load.

A DC-to-DC conversion circuit includes a bridge arm and an on-off module. The bridge arm is connected to a DC input terminal of the DC-to-DC conversion circuit and includes a first sub-bridge arm and a second sub-bridge arm. The first sub-bridge arm includes an active switch. The on-off module is connected in parallel with the first sub-bridge arm. The on-off module is turned on in response to a current of the DC-to-DC conversion circuit being greater than a target current threshold, to shunt a current through the first sub-bridge arm.

Provided are an inverter system and a control method for the inverter system, and relates to the field of inverter system technologies. The inverter system includes: a direct current-to-alternating current circuit, a phase relay being disposed at a phase line connected to the direct current-to-alternating current circuit; a first capacitor and a second capacitor that are connected in series between a positive bus and a negative bus of the inverter system; and a first switch module, the first switch module having a first terminal connected to inverter-side ground via a current-limiting resistor in an inverter nighttime repair circuit and a second terminal connected to a neutral point between the first capacitor and the second capacitor. The first switch module is configured to, switch, prior to the inverter system being connected to a power grid, to a first operating mode in which the first terminal is connected to the second terminal.

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Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …