# US 2014/0152101 A1 · Startup control method, grid interconnection apparatus, and controller

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- Number: US 2014/0152101 A1
- Document ID: US20140152101A1
- Status: Published application
- Kind: A1
- Application number: 14/234,332
- Filed: 2012-07-19
- Published: 2014-06-05
- Earliest claimed: 2011-07-22
- Assignees: KYOCERA Corporation
- Inventors: Tomonari Kusunose
- Web page: https://patentgrep.com/patent/US20140152101A1

## CPC

- H02J 3/32: using batteries or super capacitors with converting means
- H02J 3/0073: by providing alternative feeding paths when the main path fails
- H02J 3/381: {Dispersed generators}
- H02J 7/35: with light sensitive cells
- H02J 3/08: Synchronisation of networks
- H02J 2101/24: Photovoltaics
- Y02E 10/56: Power conversion systems, e.g. maximum power point trackers
- Y02E 70/30: Systems combining energy storage with energy generation of non-fossil origin
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A startup control method of controlling startup of a PV PCS 150 configured to perform interconnected operation in which a PV 100 is interconnected to a grid 10 to supply power to a load 400: supplies power from independent operation output of the PV PCS 150 to a storage PCS 250 by an independent operation that does not interconnect the PV 100 to the grid 10 before starting the interconnected operation; measures the output power amount of the PV 100 or the PV PCS 150 when the power is supplied to the storage PCS 250; and stops the independent operation to start the interconnected operation when the measured output power amount is larger than a predetermined amount.

## Claims

### Claim 1

A startup control method of controlling startup of a grid interconnection apparatus configured to perform interconnected operation in which output power of a photovoltaic cell is input to the grid interconnection apparatus and the photovoltaic cell is interconnected to a grid to supply power to a load, comprising:
a step A of supplying power from independent operation output of the grid interconnection apparatus to a predetermined load by an independent operation that does not interconnect the photovoltaic cell to the grid before starting the interconnected operation;
a step B of measuring the output power amount of the photovoltaic cell or the grid interconnection apparatus when the power is supplied to the predetermined load in the step A; and
a step C of stopping the independent operation to start the interconnected operation when the output power amount measured in the step B is larger than a predetermined amount.

### Claim 2 (depends on 1)

The startup control method according to claim 1, wherein
the predetermined load includes a storage battery with a variable charge amount, and
the method further comprises a step D of charging the storage battery with power supplied in the step A.

### Claim 3 (depends on 2)

The startup control method according to claim 2, wherein
the step B includes a step B1 of measuring the output power amount of the photovoltaic cell or the grid interconnection apparatus while varying the charge amount of the storage battery.

### Claim 4 (depends on 2)

The startup control method according to claim 2, wherein
the predetermined load includes:
the storage battery; and
another grid interconnection apparatus capable of interconnecting the storage battery to the grid,
the another grid interconnection apparatus is connected to the independent operation output of the grid interconnection apparatus via a power line, and
the step A includes a step Al of supplying alternating-current power to the another grid interconnection apparatus from the independent operation output via the power line.

### Claim 5

A grid interconnection apparatus configured to perform an interconnected operation in which output power of a photovoltaic cell is input to the grid interconnection apparatus and the photovoltaic cell is interconnected to a grid to supply power to a load, comprising:
a supply unit that supplies power from independent operation output of the grid interconnection apparatus to a predetermined load by an independent operation that does not interconnect the photovoltaic cell to the grid before starting the interconnected operation at the time of starting up the grid interconnection apparatus; and
an interconnected operation unit that stops the independent operation to start the interconnected operation when the output power amount of the photovoltaic cell or the grid interconnection apparatus is larger than a predetermined amount at the time of supplying power from the independent operation output to the predetermined load.

### Claim 6

A controller that controls a grid interconnection apparatus configured to perform an interconnected operation in which output power of a photovoltaic cell is input to the grid interconnection apparatus and the photovoltaic cell is interconnected to a grid to supply power to a load, comprising:
a supply control unit that performs control to supply power from the independent operation output of the grid interconnection apparatus to a predetermined load by the independent operation that does not interconnect the photovoltaic cell to the grid before starting the interconnected operation at the time of starting up the grid interconnection apparatus; and
an operation control unit that performs control to stop the independent operation to start the interconnected operation in a case where the output power amount of the photovoltaic cell or the grid interconnection apparatus when power is supplied from the independent operation output to the predetermined load, is larger than a predetermined amount.