# US 10,312,690 B2 · Surge suppression system for medium and high voltage > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,312,690 B2 - Document ID: US10312690B2 - Status: Granted - Kind: B2 - Application number: 15/653,406 - Filed: 2017-07-18 - Published: 2018-01-04 - Granted: 2019-06-04 - Earliest claimed: 2014-06-11 - Assignees: Asator Global Technologies LLC - Applicants: Asator Global Technologies LLC - Inventors: Daryl Moore; Jon Yarusso - Web page: https://patentgrep.com/patent/US10312690B2 ## CPC - H02H 5/005: {responsive to ionising radiation; Nuclear-radiation circumvention circuits (radiation detectors G01T; nuclear-explosion detection G21J5/00)} - H02H 7/26: Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured (locating faults in cables G01R31/08) - H02H 9/005: {avoiding undesired transient conditions} - H02J 3/16: by adjustment of reactive power - H02J 3/18: Arrangements for adjusting, eliminating or compensating reactive power in networks - H02H: EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS (indicating or signalling undesired working conditions G01R, e.g. G01R31/00, G08B; locating faults along lines G01R31/08; emergency protective devices H01H) - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY ## Abstract A system of surge suppressor units is connected at multiple locations on a power transmission and distribution grid to provide grid level protection against various disturbances before such disturbances can reach or affect facility level equipment. The surge suppressor units effectively prevent major voltage and current spikes from impacting the grid. In addition, the surge suppressor units include various integration features which provide diagnostic and remote reporting capabilities required by most utility operations. As such, the surge suppressor units protect grid level components from major events such as natural geomagnetic disturbances (solar flares), extreme electrical events (lightning) and human-generated events (EMPs) and cascading failures on the power grid. ## Claims ### Claim 1 A surge suppression system of a power distribution system of a power grid which provides power to low-voltage power consumers, comprising: at least one three phase system transformer of said power distribution system having a primary side which receives three phase power from a power source through a first set of power distribution lines, which each transmit a respective phase of said three phase power, and a secondary side, which supplies three phase power downstream through a second set of power distribution lines which each transmit a respective one of said phases of said three phase power, said primary and secondary sides including respective primary and secondary side coils to transform said three phase power from a first voltage on said primary side to a second voltage on said secondary side different from said first voltage, said system transformer stepping said first voltage up to or stepping said first voltage down from one of a medium voltage or a high voltage; and at least one surge suppressor unit which is shunt-connected to said second set of power distribution lines between said secondary side of said system transformer and another three phase system transformer via respective direct electrical connections, said surge suppressor unit comprising a plurality of transformer banks which correct voltage surges resulting from harmonics in said three phase power, each of said plurality of transformer banks including (i) a respective primary coil which connects to and receives the respective phase of three phase power carried by said second set of distribution lines at said second voltage and (ii) a respective secondary coil which connects in series together with a secondary coil of each other of said plurality of transformer banks and has a resistor connected in series therewith to harmlessly drain energy due to harmonics in said three phase power, wherein said plurality of transformer banks transform said three phase power at said second voltage to three phase power at a third voltage. ### Claim 2 (depends on 1) The surge suppression system according to claim 1, wherein said surge suppressor unit is sized to the voltage class and kVA associated with said second voltage. ### Claim 3 (depends on 1) The surge suppression system according to claim 1, wherein said primary coils of said surge suppressor unit are connected to ground. ### Claim 4 (depends on 3) The surge suppression system according to claim 3, wherein said secondary coils of said first surge suppressor unit are ungrounded. ### Claim 5 (depends on 1) The surge suppression system according to claim 1, wherein said first voltage is a high voltage and said second voltage is a medium voltage. ### Claim 6 (depends on 1) The surge suppression system according to claim 1, wherein said first set of power distribution lines includes first, second, and third power distribution lines, and said second set of power distribution lines includes fourth, fifth, and sixth power distribution lines. ### Claim 7 (depends on 1) The surge suppression system according to claim 1, wherein said voltage surges are also due to at least one of (i) an electromagnetic pulse (“EMP”), (ii) a geomagnetic disturbance (“GMD”), (iii) a voltage swell, (iv) a voltage sag, (v) a phase imbalance, and (vi) a line fault. ### Claim 8 (depends on 1) The surge suppression system according to claim 1, wherein each phase of said three phase power is associated with harmonics content. ### Claim 9 (depends on 7) The surge suppression system according to claim 7, wherein said voltage surges are created by an EMP comprising at least one of E1, E2, and E3 pulse components, and said surge suppressor units counterbalance any of said E1, E2, and E3 pulse components of said electromagnetic pulse. ### Claim 10 (depends on 7) The surge suppression system according to claim 7, said voltage surges having voltages exceeding normal operating levels by at least ten times. ### Claim 11 A surge suppression system of a power distribution system of a power grid which receives three phase power from a power source, transmits said three phase power at high and medium voltages and converts and supplies said three phase power at a low voltage, comprising: a plurality of three phase system transformers of said power distribution system which either step said power up to or step said power down from one of said medium voltage or said high voltage, each of said system transformers having a primary side which receives three phase power from a power source through a first set of power distribution lines, which each transmit a respective phase of said three phase power, and a secondary side, which supplies three phase power downstream through a second set of power distribution lines which each transmit a respective one of said phases of said three phase power, said primary and secondary sides including respective primary and secondary side coils to transform said three phase power from a primary side voltage on said primary side to a secondary side voltage on said secondary side different from said primary side voltage, said power distribution system further including at least one step down transformer stepping said secondary side voltage supplied by an upstream one of said system transformers down to said low voltage for use by low voltage power consumers; and a plurality of surge suppressor units shunt-connected to said second set of power distribution lines between said secondary side of a respective system transformer and at least one other three phase system transformer via respective direct electrical connections, each said surge suppressor unit comprising a plurality of transformer banks which correct voltage surges resulting from harmonics in said three phase power through said second set of power distribution lines, each of said plurality of transformer banks including (i) a respective primary coil which connects to and receives the respective phase of three phase power received from said power distribution system and (ii) a respective secondary coil which connects in series together with a secondary coil of each other of said plurality of transformer banks and has a resistor connected in series therewith to harmlessly drain energy due to harmonics in said three phase power, wherein said plurality of transformer banks transform said three phase power from said secondary side voltage of said system transformers to three phase power at a third voltage. ### Claim 12 (depends on 11) The surge suppression system according to claim 11, wherein said surge suppressor units are sized to the voltage class and kVA associated with said secondary side voltages of said respective system transformer to which said surge suppressor units are connected. ### Claim 13 (depends on 11) The surge suppression system according to claim 11, wherein said primary coils of each of said surge suppressor units are connected to ground, and said secondary coils of said surge suppressor units are ungrounded. ### Claim 14 (depends on 11) The surge suppression system according to claim 11, wherein said system transformers step said three phase power either up to or down from one of said medium or high voltages which is greater than said low voltage. ### Claim 15 (depends on 11) The surge suppression system according to claim 11, wherein said primary side voltage on a first one of said system transformers is received from a respective power generator which generates said three phase power for said power grid. ### Claim 16 (depends on 11) The surge suppression system according to claim 11, wherein said first set of power distribution lines includes first, second, and third power distribution lines, and said second set of power distribution lines includes fourth, fifth, and sixth power distribution lines. ### Claim 17 (depends on 11) The surge suppression system according to claim 11, wherein said voltage surges are also due to at least one of (i) an electromagnetic pulse (“EMP”), (ii) a geomagnetic disturbance (“GMD”), (iii) a voltage swell, (iv) a voltage sag, (v) a phase imbalance, and (vi) a line fault. ### Claim 18 (depends on 11) The surge suppression system according to claim 11, wherein each phase of said three phase power is associated with harmonics content. ### Claim 19 (depends on 17) The surge suppression system according to claim 17, wherein said voltage surges are created by an EMP comprising at least one of E1, E2, and E3 pulse components, and said surge suppressor units counterbalance any of said E1, E2, and E3 pulse components of said electromagnetic pulse. ### Claim 20 (depends on 17) The surge suppression system according to claim 17, said voltage surges having voltages exceeding normal operating levels by at least ten times.