System interconnection apparatus and connection method thereof

Details System interconnection apparatus and connection method thereof System interconnection apparatus and connection method thereof

2005-02-15

2005-02-15

Jackson, Stephen W. (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

Reexamination Certificate

active

06856497

ABSTRACT:
Along with the expansion of the application range of solar power generation systems, connection to a single-phase 100-V system is required. To most easily meet this requirement, a non-insulated inverter with a single-phase two-wire 100-V output is used. It is preferable to use an inverter with a single-phase two-wire 200-V output, i.e., a most popular commercially available inverter. For this purpose, a power supplied from a solar battery is converted into a single-phase three-wire 200-V AC power form by the inverter. The output from the inverter with non-insulated inputs and outputs is supplied to a system through a transformer arranged to connect the line of the single-phase three-wire 200-V AC power to a single-phase two-wire 100-V system with one line grounded. To make a ground fault sensor incorporated in the inverter function, the median potential line of the single-phase three-wire 200-V AC power is connected to the ground line of the system.

REFERENCES:
patent: 6101073 (2000-08-01), Takehara
patent: 6107560 (2000-08-01), Takehara et al.
patent: 08-080060 (1996-03-01), None
patent: 09-054623 (1997-02-01), None
patent: 09-084254 (1997-03-01), None

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