Inverter apparatus and solar power generation apparatus
First Claim
1. An inverter system comprising:
- an inverter connected between a DC power supply and a load, which operates to convert the DC power input from the DC power supply into AC power and to supply the AC power to the load, the load and inverter being connected at a node;
a switch connected between a main AC power system and the load/inverter connection node;
a first detector for detecting an open/closed state of the switch;
a second detector for detecting a normal/abnormal state of the main AC power system; and
a controller for controlling the operation of said inverter based on the detected states of the first and second detectors, wherein in a case where the inverter is in operation and the switch is in the closed state, the controller first causes the inverter to stop operating when the abnormal state of the main AC power system has been detected by the second detector, and then causes the inverter to restart operating when the open state of the switch has been detected by the first detector.
1 Assignment
0 Petitions
Accused Products
Abstract
In order to provide an inverter apparatus and a solar power generation apparatus in which when a main AC power system (5) has suffered, e.g., a power failure, the operation mode of an inverter (2) in the tie operation with the main AC power system (5) can be easily and safely switched from the tie operation mode to the self-support operation mode, and electric power can be supplied to a load (4) directly using normal indoor wiring, the open/closed state of a switch (3) for opening/closing a connection between the output terminal of the inverter (2) and the main AC power system (5) is detected, and the self-support operation of the inverter (2) is started when the open state of the switch (3) is detected.
73 Citations
28 Claims
-
1. An inverter system comprising:
-
an inverter connected between a DC power supply and a load, which operates to convert the DC power input from the DC power supply into AC power and to supply the AC power to the load, the load and inverter being connected at a node; a switch connected between a main AC power system and the load/inverter connection node; a first detector for detecting an open/closed state of the switch; a second detector for detecting a normal/abnormal state of the main AC power system; and a controller for controlling the operation of said inverter based on the detected states of the first and second detectors, wherein in a case where the inverter is in operation and the switch is in the closed state, the controller first causes the inverter to stop operating when the abnormal state of the main AC power system has been detected by the second detector, and then causes the inverter to restart operating when the open state of the switch has been detected by the first detector. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A method for controlling an inverter system, the inverter system including an inverter connected between a DC power supply and a load, which operates to convert the DC power input from the DC power supply into AC power and to supply the AC power to the load, the load and inverter being connected at a node, a switch connected between a main AC power system and the load/inverter connection node, a first detector for detecting an open/closed state of the switch, and a second detector for detecting a normal/abnormal state of the main AC power system, the method comprising the steps of:
-
operating the inverter in the closed state of the switch; stopping the operation of the inverter when the abnormal state of the main AC power system has been detected by the second detector; and restarting the operation of the inverter when the open state of the switch has been detected by the first detector. - View Dependent Claims (8, 9, 10, 11, 12)
-
-
13. A solar power generation system comprising:
-
a solar battery which outputs DC power; an inverter connected between the solar battery and a load, which operates to convert the DC power output from the solar battery into AC power and to supply the AC power to the load, the load and inverter being connected at a node; a switch connected between a main AC power system and the load/inverter connection node; a first detector for detecting an open/closed state of the switch; a second detector for detecting a normal/abnormal state of the main AC power system; and a controller for controlling the operation of said inverter based on the detected states of the first and second detectors, wherein in a case where the inverter is in operation and the switch is in the closed state, the controller first causes the inverter to stop operating when the abnormal state of the main AC power system has been detected by the second detector, and then causes the inverter to restart operating when the open state of the switch has been detected by the first detector. - View Dependent Claims (14, 15, 16)
-
-
17. A method for controlling a solar power generation system, the solar power generation system including a solar battery which outputs DC power, an inverter connected between the solar battery and a load, which operates to convert the DC power output from the solar battery into AC power and to supply the AC power to the load, the load and inverter being connected at a node, a switch connected between a main AC power system and the load/inverter connection node, a first detector for detecting an open/closed state of the switch, and a second detector for detecting a normal/abnormal state of the main AC power system, the method comprising the steps of:
-
operating the inverter in the closed state of the switch; stopping the operation of the inverter when the abnormal state of the main AC power system has been detected by the second detector; and restarting the operation of the inverter when the open state of the switch has been detected by the first detector. - View Dependent Claims (18, 19, 20)
-
-
21. A solar power generation system comprising:
-
a solar battery which outputs DC power; an inverter connected between the solar battery and a second switch, the second switch being connected to a load, the inverter operating to convert the DC power output from the solar battery into AC power and to supply the AC power to the load through the second switch, the second switch being connected to the inverter at a node; a first switch connected between a main AC power system and the load/second switch connection node; a first detector for detecting respective open/closed states of the first and second switches; a second detector for detecting a normal/abnormal state of the main AC power system; and a controller for controlling the operation of said inverter based on the detected states of the first and second detectors, wherein in a case where the inverter is in operation and the first and second switches are in the closed state, the controller first causes the inverter to stop operating when the abnormal state of the main AC power system has been detected by the second detector, and then causes the inverter to restart operating when the open states of the first and second switches have been detected by the first detector. - View Dependent Claims (22, 23, 24)
-
-
25. A method for controlling a solar power generation system, the solar power generation system including a solar battery which outputs DC power, an inverter connected between the solar battery and a second switch, the second switch being connected to a load, the inverter operating to convert the DC power output from the solar battery into AC power and to supply the AC power to the load through the second switch, the second switch being connected to the inverter at a node, a first switch connected between a main AC power system and the load/second switch connection node, a first detector for detecting respective open/closed states of the first and second switches, and a second detector for detecting a normal/abnormal state of the main AC power system, the method comprising the steps of:
-
operating the inverter in the closed states of the first and second switches; stopping the operation of the inverter when an abnormal state of the main AC power system has been detected by the second detector; and restarting the operation of the inverter when the open states of the first and second switches have been detected by the first detector. - View Dependent Claims (26, 27, 28)
-
Specification