Power unit and high-voltage electricity conversion device

Abstract

The embodiment of the invention discloses a power unit and a high-voltage electricity conversion device. Capacitor modules can be freely added according to different capacities, power units with different power sections can be obtained, and the whole device is small in size and low in structural cost. The power unit comprises a left power device module, at least one capacitor module, a right power device module and at least one printed circuit board control panel, wherein the left power device module, the at least one capacitor module and the right power device module are sequentially connected and combined linearly to form a box structure, and the PCB control panel is arranged on the left power device module and/or the right power device module connected with the capacitor module.

Description

technical field [0001] The invention relates to the technical field of frequency conversion, in particular to a power unit and high-voltage power conversion equipment. Background technique [0002] A high-voltage static var generator (Statle Var Generator, referred to as a high-voltage SVG) is a free-commutation power semiconductor bridge converter for dynamic reactive power compensation. The high-voltage inverter is generally connected in series through multiple power units. As for power frequency conversion equipment that outputs high voltage, high-voltage SVGs and high-voltage frequency converters generally contain several power units, and each power unit has a large power output and a large volume and weight. Such as figure 1 As shown, the power unit of a high-voltage SVG or a high-voltage inverter is mainly composed of power devices, capacitors, metal casings, connecting copper bars, control printed circuit boards (PCB for short), heat sinks, and output copper bars. ...

AI Technical Summary

Problems solved by technology

[0004] 1. In products with the same capacity, the gap between the metal shell and the internal conductor is large, and the power unit is bulky, which makes the whole machine bulky and the structural cost of the whole machine is high;

[0005] 2. Structural parts of different capacity levels have poor versatility and cannot be combined and compatible according to requirements;

[0006] 3. Power devices, capacitors, control boards, copper bars, radiators, etc. are scattered and disorderly arranged in the box, and are installed one by one according to the assembly process of the whole machine. The process is cumbersome and the production efficiency is low.

[0007] 4. The heat sink, shell and power unit of the power unit are heavy as a whole, and it is very troublesome to assemble, especially when the product is turned over for assembly, and safety accidents are prone to occur

[0008] 5. It is inconvenient to maintain. It is necessary to disassemble the upper or outer parts of the box before maintaining the lower or inner parts.

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