| 摘要 |
PROBLEM TO BE SOLVED: To provide a power measuring device and a power measuring method in which the calculation of phase difference between an AC voltage measured by using capacity coupling and an actual AC voltage is not required and which can suppress an increase in errors included in the measured AC power even if capacity formed between an electrode and a power line varies.SOLUTION: Input impedance of a voltage part 15 makes a cutoff frequency of a high frequency pass filter constituted of a first capacity formed by a power line 12a and a first electrode 13a1, a second capacity formed by a power line 12b and a second electrode 13b1, and the input impedance of the voltage part 15 have higher frequency than that of an AC voltage. |
