# US 12,119,648 B2 · Method for generating an inductive reactive power by means of an electrical load apparatus, electrical load apparatus, and electrolysis apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,119,648 B2 - Document ID: US12119648B2 - Status: Granted - Kind: B2 - Application number: 17/623,389 - Filed: 2020-05-26 - Published: 2022-12-29 - Granted: 2024-10-15 - Earliest claimed: 2019-07-17 - Assignees: Siemens Energy Global GmbH & Co. KG - Applicants: Siemens Energy Global GmbH & Co. KG - Inventors: Peter Utz - Web page: https://patentgrep.com/patent/US12119648B2 ## CPC - H02J 3/18: Arrangements for adjusting, eliminating or compensating reactive power in networks - H02J 3/1892: the arrangements being an integral part of the loads or of their control circuits - H02M 7/155: using semiconductor devices only - 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 - 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 A method for generating an inductive reactive power for a public grid by an electrical load apparatus, in which, in a first operating mode of the electrical load apparatus, an alternating current of the public grid is transformed by a transformer device and the transformed alternating current is provided for an electrical load of the electrical load apparatus. In a second operating mode of the electrical load apparatus that is different from the first operating mode, the transformer device is short-circuited in a phase-controlled manner by a switching device of the electrical load apparatus, wherein the switching device is phase-controlled such that, depending on a phase angle of the phase control of the switching device by the transformed alternating current, the inductive reactive power for the public grid is generated by the switching device. ## Claims ### Claim 1 A method for generating an inductive reactive power for a public grid by means of an electrical consumer apparatus, the method comprising: in a first operating mode of the electrical consumer apparatus, transforming an AC current of the public grid by means of a transformer device, and providing the transformed AC current for an electrical consumer of the electrical consumer apparatus, in a second operating mode of the electrical consumer apparatus that is different to the first operating mode, short-circuiting the transformer device in a phase-controlled manner by means of a switching device of the electrical consumer apparatus, wherein the switching device is phase-controlled in such a way that the inductive reactive power is generated by means of the transformed AC current for the public grid by means of the switching device depending on a phase gating angle of the phase control of the switching device, and additionally controlling the inductive reactive power by means of a tap changer of the transformer device. ### Claim 2 (depends on 1) The method as claimed in claim 1, wherein the switching device has a rectifier circuit and an isolating switch, wherein the isolating switch is closed to short-circuit the transformer device and the phase gating angle is controlled by means of the rectifier circuit by clocked actuation of the rectifier circuit. ### Claim 3 (depends on 2) The method as claimed in claim 2, wherein the transformed AC current is phase-controlled by means of a six-pulse bridge circuit as the rectifier circuit. ### Claim 4 (depends on 3) The method as claimed in claim 3, wherein the inductive reactive power is generated by means of the rectifier circuit in such a way that it corresponds to an installed apparent power of the transformer device. ### Claim 5 (depends on 4) The method as claimed in claim 4, wherein the rectifier circuit is operated with a rated current of the rectifier circuit to generate the inductive reactive power. ### Claim 6 (depends on 1) The method as claimed in claim 1, wherein the switching device is controlled with a phase gating angle of at least greater than 75°. ### Claim 7 (depends on 6) The method as claimed in claim 6, wherein the phase gating angle is greater than 80°. ### Claim 8 (depends on 6) The method as claimed in claim 6, wherein the phase gating angle is greater than 85°. ### Claim 9 (depends on 6) The method as claimed in claim 6, wherein the phase gating angle is greater than 90°. ### Claim 10 (depends on 1) An electrical consumer apparatus for generating an inductive reactive power, comprising: at least one transformer device, and a switching device, wherein the electrical consumer apparatus is designed to carry out a method as claimed in claim 1. ### Claim 11 (depends on 10) An electrolysis apparatus for carrying out electrolysis in a first operating mode and for generating an inductive reactive power for a public grid in a second operating mode, comprising: at least one electrolysis device, wherein the at least one electrolysis device comprises the electrical consumer apparatus as claimed in claim 10. ### Claim 12 (depends on 11) The electrolysis apparatus as claimed in claim 11, wherein the electrolysis apparatus has a tap changer for coarse regulation of the electrolysis and a thyristor switch for fine regulation of the electrolysis in the first operating mode.