# US 12,009,662 B2 · Magnetically controllable inductor coil in a series circuit > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,009,662 B2 - Document ID: US12009662B2 - Status: Granted - Kind: B2 - Application number: 17/416,613 - Filed: 2019-11-18 - Published: 2022-03-17 - Granted: 2024-06-11 - Earliest claimed: 2018-12-18 - Assignees: Siemens Energy Global GmbH & Co. KG - Applicants: Siemens Energy Global GmbH & Co. KG - Inventors: Matthias Kuestermann; Ronny Fritsche; Thomas Manthe; Thomas Hammer - Web page: https://patentgrep.com/patent/US12009662B2 ## CPC - H02J 3/1807: using series compensators, e.g. thyristor-controlled series capacitors [TCSC] - H01F 29/14: with variable magnetic bias - H02M 1/08: Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters - H02M 7/537: using semiconductor devices only, e.g. single switched pulse inverters - Y02E 40/30: Reactive power compensation - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES - H02M: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF (transformers H01F; dynamo-electric converters H02K47/00; controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters H02P) - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract An apparatus for dynamic load flow control in high-voltage networks has at least one phase conductor and first high-voltage connection for connection to each phase conductor. Each first high-voltage connection has first and second core sections of a closed magnetic circuit and first and second high-voltage windings surrounding respective core portions and connected in parallel. The core portions and windings are in a tank filled with ester fluids. At least one saturation switching branch outside the tank saturates the core sections and has controllable power semiconductor switches. A control unit controls the power semiconductor switches. The first and second high-voltage windings are connected at high-voltage ends to associated first high-voltage connections and at low-voltage ends to respective saturation switching branches. The device is connectable in series into the high-voltage network, with the saturation switching branches electrically insulated from ground potential. ## Claims ### Claim 1 An apparatus for dynamic load flow control in a high-voltage network having a phase conductor and at least a first high-voltage connection for connection to the phase conductor, the apparatus comprising: a tank; first and second core sections being part of a closed magnetic circuit and being disposed in said tank; a first high-voltage winding surrounding said first core section; a second high-voltage winding surrounding said second core section, said second high-voltage winding connected in parallel with said first high-voltage winding; at least one saturation switching branch configured to saturate said core sections, said at least one saturation switching branch having controllable power semiconductor switches, said at least one saturation switching branch being disposed outside of said tank and mounted to be electrically insulated from ground potential; and a control unit for controlling said power semiconductor switches; said first and second high-voltage windings being connected to the first high-voltage connection and said first and second high-voltage windings configured to be connected to said at least one saturation switching branch; and a second high-voltage connection for connection to the phase conductor, said second high-voltage connection being connected directly, or through said at least one saturation switching branch, to at least one of said first and second high-voltage windings. ### Claim 2 (depends on 1) The apparatus according to claim 1, which further comprises a high-voltage platform having a supporting structure and electrically insulating supporting columns supporting said high-voltage platform on the ground, said at least one saturation switching branch being disposed on said high-voltage platform. ### Claim 3 (depends on 1) The apparatus according to claim 1, which further comprises at least one high-voltage bushing installed on said tank, said at least one high-voltage bushing connecting said at least one saturation switching branch to at least one of said high-voltage windings. ### Claim 4 (depends on 1) The apparatus according to claim 1, wherein at least one of said first and second high-voltage windings has a center connection connecting said at least one high-voltage winding to said at least one saturation switching branch, and said high-voltage windings have winding ends each being connected to a respective one of the first and second high-voltage connections. ### Claim 5 (depends on 1) The apparatus according to claim 1, wherein each of said first and second high-voltage windings has a center connection connected to said at least one saturation switching branch. ### Claim 6 (depends on 1) The apparatus according to claim 1, wherein said at least one saturation switching branch has at least one two-pole submodule with a bridge circuit having power semiconductor switches and a DC voltage source, said DC voltage source being either connected in series with at least one of said first and second high-voltage windings or bridged, depending on a control of said power semiconductor switches. ### Claim 7 (depends on 6) The apparatus according to claim 6, wherein: said at least one two-pole submodule forms a full-bridge circuit having a first series circuit branch and a second series circuit branch each being connected in parallel with said DC voltage source; said at least one two-pole submodule has first and second connection terminals; each of said series circuit branches has a series circuit including two power semiconductor switches; said first series circuit branch has a potential point between said power semiconductor switches being connected to said first connection terminal; and said second series circuit branch has a potential point between said power semiconductor switches being connected to said second connection terminal. ### Claim 8 (depends on 6) The apparatus according to claim 6, wherein each of said power semiconductor switches is an IGBT with a freewheeling diode connected in parallel in an opposite sense, a GTO or a transistor switch. ### Claim 9 (depends on 6) The apparatus according to claim 6, wherein each of said DC voltage sources includes an energy storage device. ### Claim 10 (depends on 9) The apparatus according to claim 9, wherein said energy storage devices are configured to be connected to a supply network. ### Claim 11 (depends on 1) The apparatus according to claim 1, which further comprises compensation windings inductively coupled to said first and second high-voltage windings, and at least one capacitively acting component part connected to said compensation windings. ### Claim 12 (depends on 11) The apparatus according to claim 11, wherein said capacitively acting component part has capacitors.