https://blog.gongquiz.com/2021/08/25/%ec%97%ad%eb%a5%a0-80%ec%9d%b8-%eb%b6%80%ed%95%98%ec%9d%98-%ec%a0%84%eb%a0%a5%ec%9d%b4-400kw-%ec%9d%b4%eb%9d%bc%eb%a9%b4-%eb%ac%b4%ed%9a%a8%ec%a0%84%eb%a0%a5%ec%9d%80-%eb%aa%87-kvar%ec%9d%b8%ea%b0%80/