| 摘要 |
PROBLEM TO BE SOLVED: To provide a power conditioner in which construction mistake about transformer for current detection can be found easily without providing any special circuit, in the power conditioner of a power generation system including a power generation unit where inverse power flow to a power system is allowed.SOLUTION: In a power conditioner including a current sensor 6 for calculating the buying and selling electric energy, and a control unit 21 having a buying and selling electric energy calculation function for calculating the buying and selling electric energy based on a detection value of the current sensor 6, the control unit 21 lowers the output power from the power conditioner 2 by a certain amount when it is equal to or greater than a predetermined value, and determines quality of construction state of the current sensor 6 based on the fact whether or not the fluctuation amount of buying and selling electric energy before and after lowering of the output power falls within a predetermined range that is set based on the certain amount. |
