# US 2014/0152097 A1 · Power supply system, power distribution apparatus, and power control method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0152097 A1 - Document ID: US20140152097A1 - Status: Published application - Kind: A1 - Application number: 14/235,068 - Filed: 2012-07-26 - Published: 2014-06-05 - Earliest claimed: 2011-07-26 - Assignees: KYOCERA Corporation - Inventors: Mitsuhiro Kitaji - Web page: https://patentgrep.com/patent/US20140152097A1 ## CPC - H02J 1/10: Parallel operation of DC sources - H02J 3/06: Controlling the transfer of power between connected networks; Controlling load sharing between connected networks - H02J 3/381: {Dispersed generators} - H02J 3/388: Arrangements for the handling of islanding, e.g. for disconnection or for avoiding the disconnection of power - H02J 7/35: with light sensitive cells - H02J 9/061: {for DC powered loads} - H02J 2101/24: Photovoltaics - H02J 2101/30: Fuel cells - Y02B 10/70: Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies - Y02B 90/10: Applications of fuel cells in buildings - Y02E 10/56: Power conversion systems, e.g. maximum power point trackers - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A power supply system comprises a path switching means that switches a power supply path between power generation equipment and a load so that at least a part of output power of each power generation equipment is supplied to another power generation equipment during a power failure or power instability in the grid. ## Claims ### Claim 1 A power supply system that supplies power to a load by using a plurality of different power generation equipment capable of being interconnected to a grid, comprising: a path switching means that switches a power supply path between the plurality of power generation equipment and the load so that at least a part of output power of each power generation equipment is supplied to another power generation equipment during a power failure or power instability in the grid. ### Claim 2 (depends on 1) The power supply system according to claim 1, further comprising: a off-line apparatus that performs off-line of the plurality of power generation equipment from the grid during a power failure or power instability in the grid. ### Claim 3 (depends on 2) The power supply system according to claim 2, further comprising: a power supply apparatus that supplies power to the plurality of power generation equipment during a power failure or power instability in the grid, wherein the path switching means switches the power supply path within a period in which the power supply apparatus supplies power to the power generation equipment. ### Claim 4 (depends on 3) The power supply system according to claim 3, wherein the plurality of power generation equipment include an islanding prevention function individually, and the power supply apparatus supplies, to the plurality of power generation equipment, power substantially equal to power supplied from the grid before a power failure or unstable power state occurs, in a parameter, which is a criterion for power failure determination by an active detection method in the islanding prevention function. ### Claim 5 (depends on 3) The power supply system according to claim 3, wherein the off-line apparatus is provided on a power line between the grid and the power supply apparatus. ### Claim 6 (depends on 3) The power supply system according to claim 3, wherein the power supply apparatus includes a storage battery, one of the plurality of power generation equipment is a fuel cell power generation equipment that performs a constant output operation at a rated output power, and the storage battery is charged with surplus power obtained by subtracting total power consumption of the load from the total output power of the plurality of power generation equipment. ### Claim 7 (depends on 3) The power supply system according to claim 3, further comprising a controller that controls the load, wherein the controller controls the load so that total power consumption amount of the load is smaller than total output power amount of the plurality of power generation equipment and when the total output power amount of the power generation equipment is smaller than the total power consumption amount of the load during a power failure or power instability in the grid. ### Claim 8 (depends on 7) The power supply system according to claim 7, wherein the power supply apparatus includes a storage battery, the controller controls the load so that the total power consumption amount of the load is smaller than the total output power amount by the time a remaining amount of the storage battery is exhausted. ### Claim 9 (depends on 7) The power supply system according to claim 7, wherein the power supply apparatus includes a storage battery, when the total output power of the plurality of power generation equipment is larger than the total power consumption of the load, the controller controls to charge the storage battery with surplus power obtained by subtracting the total power consumption from the total output power. ### Claim 10 (depends on 3) The power supply system according to claim 3, wherein the plurality of power generation equipment include a first power generation equipment and a second power generation equipment, the plurality of power generation equipment further include a first power line connected to the first power generation equipment and a second power line connected to the second power generation equipment, the path switching means includes: a third power line connected to the first power line; and a switch that is provided on the second power line and switches the second power line to be connected or not connected to the third power line, and the switch switches the power supply path so that at least a part of output power of each power generation equipment is supplied to another power generation equipment by connecting the second power line to the third power line during a power failure or power instability in the grid. ### Claim 11 A power distribution apparatus that supplies power to a load by using a plurality of different power generation equipment capable of being interconnected to a grid, comprising: a path switching means that switches a power supply path between the plurality of power generation equipment and the load so that at least a part of output power of each power generation equipment is supplied to another power generation equipment during a power failure or power instability in the grid. ### Claim 12 A power control method in a power supply system that supplies power to a load by using a plurality of different power generation equipment capable of being interconnected to a grid, comprising: a step of switching a power supply path between the power generation equipment and the load so that at least a part of output power of each power generation equipment is supplied to another power generation equipment during a power failure or power instability in the grid.