# US 2017/0285080 A1 · Power grid system and method of determining power consumption at one or more building connections in a power grid system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0285080 A1 - Document ID: US20170285080A1 - Status: Published application - Kind: A1 - Application number: 15/507,286 - Filed: 2015-06-19 - Published: 2017-10-05 - Earliest claimed: 2014-08-29 - Assignees: Sun Electric Pte. Ltd - Applicants: Sun Electric Pte Ltd - Inventors: Matthew PELOSO - Web page: https://patentgrep.com/patent/US20170285080A1 ## CPC - G01R 21/133: by using digital technique - G01R 21/1333: {adapted for special tariff measuring} - G01R 22/00: Arrangements for measuring time integral of electric power or current, e.g. electricity meters - G01R 19/2513: {Arrangements for monitoring electric power systems, e.g. power lines or loads; Logging} - H02J 3/381: {Dispersed generators} - H02J 2101/24: Photovoltaics - Y02B 10/10: Photovoltaic [PV] - Y02E 10/56: Power conversion systems, e.g. maximum power point trackers - Y02P 80/10: Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier - G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12) - 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 - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS ## Abstract Power grid system and method of determining power consumption at one or more building connections in a power grid system. The power grid system comprises a power grid comprising a mains grid portion; a plurality of building connections, each building connection comprising a first meter configured for metering power imported from the mains grid portion to the associated building and power exported from the associated building into the mains grid portion; for one or more of the building connections, at least one second meter disposed downstream from the first meter relative to the mains grid portion and configured for metering power exported to the associated building from an auxiliary generator; and a consolidation unit configured for determining power consumption at said one or more of the building connections based on readings from the associated first and second meters. ## Claims ### Claim 1 A power grid system comprising: a power grid comprising a mains grid portion; a plurality of building connections, each building connection comprising a first meter configured for metering power imported from the mains grid portion to the associated building and power exported from the associated building into the mains grid portion; for one or more of the building connections, at least one second meter disposed downstream from the first meter relative to the mains grid portion and configured for metering power exported to the associated building from an auxiliary generator; and a consolidation unit configured for determining power consumption at said one or more of the building connections based on readings from the associated first and second meters. ### Claim 2 (depends on 1) The power grid system as claimed in claim 1, wherein the consolidation unit is configured for determining the power consumption by calculating C=M1import−M1export+M2export, where C is the consumed power, M1import is the power imported from the mains power grid to the associated building, M1export is the power exported from the associated building into the mains power grid and M2export is the power exported to the associated building from the auxiliary generator. ### Claim 3 (depends on 1) The power grid system as claimed in claim 1, wherein the consolidation unit is further configured for determining power supplied by the auxiliary generator to the power grid on the basis of the reading from the second meter. ### Claim 4 (depends on 3) The power grid system as claimed in claim 3, wherein the consolidation unit is further configured for settling an aggregate supply of power from one or more auxiliary generators to one or more loads connected on the power grid system. ### Claim 5 (depends on 1) The power grid system as claimed in claim 1, wherein the auxiliary generator comprises a photo-voltaic (PV) generator. ### Claim 6 (depends on 5) The power grid system as claimed in claim 5, wherein the PV generator is disposed on a roof top area of the building. ### Claim 7 (depends on 1) The power grid system as claimed in claim 1, wherein the consolidation unit is further configured to determine power consumption at one or more other building connections on the basis of the reading from the first meter. ### Claim 8 (depends on 1) The power grid system as claimed in claim 1, wherein the consolidation unit is configured for remotely reading any one or more of the first and second meters. ### Claim 9 A method of determining power consumption at one or more building connections in a power grid system, the method comprising: metering power imported from a mains grid portion of the power grid system to a building associated with respective ones of the one or more building connections and power exported from the associated building into the mains grid portion using a first meter; metering, for one or more of the building connections, power exported to the associated building from an auxiliary generator using a second meter disposed downstream from the first meter relative to the mains grid portion; and determining power consumption at said one or more of the building connections based on readings from the first and from the second meters. ### Claim 10 (depends on 9) The method as claimed in claim 9, wherein the determining the power consumption is by calculating C=M1import−M1export+M2export, where C is the consumed power, M1import is the power imported from the mains power grid to the associated building, M1export is the power exported from the associated building into the mains power grid and M2export is the power exported to the associated building from the auxiliary generator. ### Claim 11 (depends on 9) The method as claimed in claim 9, further comprising determining power supplied by the auxiliary generator to the power grid on the basis of the reading from the second meter. ### Claim 12 (depends on 10) The method as claimed in claim 10, further comprising settling an aggregate supply of power from one or more auxiliary generators to one or more loads connected on the power grid system. ### Claim 13 (depends on 9) The method as claimed in claim 9, wherein the auxiliary generator comprises a photo-voltaic (PV) generator. ### Claim 14 (depends on 13) The method as claimed in claim 13, wherein the PV generator is disposed on a roof top area of the building. ### Claim 15 (depends on 9) The method as claimed in claim 9, further comprising determining power consumption at one or more other building connections on the basis of the reading from the first meter. ### Claim 16 (depends on 1) The method as claimed in claim 1, comprising remotely reading the any one or more of the first and second meters.