Abstract: A power conversion apparatus includes: a first capacitor branch, where the first capacitor branch includes at least one electrolytic capacitor, and is configured to perform voltage stabilization on a voltage received by the power conversion apparatus, to obtain a first voltage; a second capacitor branch, where the second capacitor branch includes a plurality of film capacitors connected in series, and is configured to: perform filtering on the first voltage, and perform voltage division on a first voltage obtained through filtering, to obtain a plurality of second voltages, where each film capacitor obtains one second voltage; and direct current converters in a one-to-one correspondence with the film capacitors, where an input end of each direct current converter is connected in parallel to the corresponding film capacitor; and the direct current converter is configured to perform voltage conversion on the second voltage output by the film capacitor.

Abstract: A three-phase alternating current system port is configured to receive or output a three-phase alternating current. M direct current system ports are configured to separately receive or output a direct current, where M is an integer, and M?2. Three power conversion modules are configured to separately receive or output one phase alternating current in the three-phase alternating current. Each power conversion module includes at least one power unit. Each power unit is configured to implement conversion and galvanic isolation between a single-phase alternating current and a direct current. Each power unit includes one alternating current port and M direct current ports. The alternating current ports of the at least one power unit are connected in series and then connected to the three-phase alternating current system port. The M direct current ports of each power unit are separately connected to the M direct current system ports.

Abstract: This application relates to a transformer and power equipment. The transformer includes: a low-voltage coil; a high-voltage coil; a magnetic core, where at least a part of the magnetic core is penetrated through the low-voltage coil and the high-voltage coil; an insulation member with a ground plane disposed on an outer surface of the insulation member; and a voltage uniform layer. The insulation member is wrapped around the high-voltage coil, so that the high-voltage coil is insulated from the low-voltage coil and the magnetic core, heat dissipation of the high-voltage coil, low-voltage coil and the magnetic core can be facilitated, and a service life of the transformer can be prolonged. A structure of the transformer is simplified, so that installation and maintenance of the low-voltage coil and the magnetic core can be facilitated, and processing and maintenance costs of the transformer can be reduced.

Abstract: This application provides a dry-type transformer and a winding method thereof. The dry-type transformer includes a magnetic core, a first coil, a second coil, and a shielding component. The first coil is disposed around the exterior of the magnetic core, and the second coil is disposed around the exterior of the first coil. In a direction from the iron core to the second coil, the shielding component includes a first conducting layer, a second conducting layer, a third conducting layer, and a fourth conducting layer that are sequentially disposed at intervals, the first coil is disposed between the magnetic core and the first conducting layer, and the second coil is disposed between the second conducting layer and the third conducting layer.