Flow direction detection device, flow direction detection method, and flow direction detection program

A detection method comprising:

• measuring a first current on a side of a first power line with respect to a connecting point between the first power line extending from a commercial power supply and a second power line extending from a power generation means that supplies power having the same frequency as the commercial power supply, performed by a first current transformer;
• measuring a second current on a side of the second power line with respect to the connecting point, performed by a second current transformer;
• detecting a direction of the first current;
• detecting a direction of the second current;
• calculating an exclusive OR between a detected value of the direction of the first current and a detected value of the direction of the second current;
• and
• detecting a power flow direction of the first power line based on the exclusive OR.

A detection apparatus comprising:

• a first current direction detector that detects a direction of a first current measured by a first current transformer on a side of a first power line with respect to a connecting point between the first power line extending from a commercial power supply and a second power line extending from a power generation means that supplies power having the same frequency as the commercial power supply;
• a second current direction detector that detects a direction of a second current measured by a second current transformer on a side of the second power line with respect to the connecting point;
• an exclusive OR calculator that calculates an exclusive OR between a detected value of the direction of the first current and a detected value of the direction of the second current;
• and
• a power flow direction detector that detects a power flow direction of the first power line based on the exclusive OR.

A detection method comprising the following steps performed by a detection apparatus that detects a state of power:

• detecting a direction of a first current measured by a first current transformer on a side of a first power line with respect to a connecting point between the first power line extending from a commercial power supply and a second power line extending from a power generation means that supplies power having the same frequency as the commercial power supply;
• detecting a direction of a second current measured by a second current transformer on a side of the second power line with respect to the connecting point;
• calculating an exclusive OR between a detected value of the direction of the first current and a detected value of the direction of the second current;
• and
• detecting a power flow direction of the first power line based on the exclusive OR.

A program stored on a computer readable medium for causing a computer to perform:

• detecting a direction of a first current measured by a first current transformer on a side of a first power line with respect to a connecting point between the first power line extending from a commercial power supply and a second power line extending from a power generation means that supplies power having the same frequency as the commercial power supply;
• detecting a direction of a second current measured by a second current transformer on a side of the second power line with respect to the connecting point;
• calculating an exclusive OR between a detected value of the direction of the first current and a detected value of the direction of the second current;
• and
• detecting a power flow direction of the first power line based on the exclusive OR.