| 摘要 |
PROBLEM TO BE SOLVED: To provide a power measurement device, a power transmission system, and a power measurement method.SOLUTION: In a power transmission system including first and second power generation means for supplying single-phase three-wire type AC power and a load unit including a load apparatus connected between a first voltage line and a neutral line and/or between a second voltage line and the neutral line and/or between the first voltage line and the second voltage line and supplied with the AC power from the first power generation means and/or the second power generation means, the power measurement device comprises: a power arithmetic unit for adding up and sequentially outputting, for each prescribed period and for only the prescribed period, a power value which is the product of a current value and a voltage value from each current sensor and each voltage sensor in a sensor unit; and a polarity control circuit for causing, when the result of comparison, by each polarity control circuit, of each total power value added up for only the prescribed period satisfies a prescribed condition, a value obtained by inverting a code of the total power value outputted by each power arithmetic unit to be outputted from the power arithmetic unit. |
