Power conversion device

A power conversion device comprising:

• a capacitor series circuit composed of a first smoothing capacitor and a second smoothing capacitor connected in series to each other;
• and
• a power conversion section including a plurality of semiconductor switching elements and for performing power conversion between DC power of the capacitor series circuit and AC power,
• the power conversion device further comprising:
• a first connection line connecting a positive electrode of the capacitor series circuit and a positive electrode of the power conversion section;
• a second connection line connecting a negative electrode of the capacitor series circuit and a negative electrode of the power conversion section;
• and
• a third connection line connecting in series the first smoothing capacitor and the second smoothing capacitor, wherein
• one of the first and second connection lines is composed of two bus bars that are not adjacent to each other and that are connected in parallel to each other, the other of the first and second connection lines is composed of one bus bar disposed so as to be adjacent to one of the two bus bars connected in parallel to each other, the third connection line is composed of one bus bar, and the four bus bars in total are stacked in close contact with one another via insulating layers to form a stacked bus bar.