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|1. (WO2018008137) POWER CONVERSION DEVICE AND WIND POWER GENERATION SYSTEM|
|Title:||POWER CONVERSION DEVICE AND WIND POWER GENERATION SYSTEM|
In order to ensure an insulation distance and a creepage distance between different voltage levels in a power converter, conventional techniques using air insulation have been causing the power converter to increase in size as an input voltage and an output voltage increase. There has also been a problem that, when the air insulation is changed to oil insulation to reduce the size of the power converter, it becomes difficult to replace components. A power converter is configured by dividing components (a semiconductor element, a smoothing capacitor, a semiconductor element driving circuit, and a wire or a metal conductor plate for connecting each of the components) constituting the power converter, housing the divided components in a plurality of individual boxes filled with an insulating oil, and connecting the individual boxes with each other. The power converter is housed in a chassis box filled with an insulating oil, thereby reducing the size of the power converter. Dividing the power converter into the plurality of individual boxes improves the workability of component replacement.