×

AC interconnection apparatus supplying AC power from a commercial power system and from a solar cell

  • US 6,605,881 B2
  • Filed: 10/30/2001
  • Issued: 08/12/2003
  • Est. Priority Date: 10/31/2000
  • Status: Expired due to Fees
First Claim
Patent Images

1. An AC interconnection apparatus for supplying to a load both AC power from a commercial power system and an output from a solar cell, comprising:

  • an inverter for converting the output from the solar cell into AC power;

    a current detector arranged between the load and an AC connection point for connecting the AC input from the commercial power system and the AC output from said inverter to detect a current flowing to the load; and

    control means for obtaining load power applied to the load on the basis of a voltage value at the AC connection point and the current value detected by said current detector and controlling the output of said inverter on the basis of the load power and the output power of said inverter, wherein, when the power supplied to the load becomes less than the output of said inverter, said control means suppresses the output of said inverter so as to prevent reverse power flow to the commercial power system.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×