# US 2025/0096574 A1 · Apparatus for controlling a power converter in a power transmission network > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0096574 A1 - Document ID: US20250096574A1 - Status: Published application - Kind: A1 - Application number: 18/820,766 - Filed: 2024-08-30 - Published: 2025-03-20 - Earliest claimed: 2023-09-18 - Assignees: GE Infrastructure Technology LLC - Applicants: GE Infrastructure Technology LLC - Inventors: Amit KUMAR; Carl BARKER; Sameer SINGHAL - Web page: https://patentgrep.com/patent/US20250096574A1 ## CPC - H02J 3/36: Arrangements for transfer of electric power between AC networks via high-voltage DC [HVDC] links; Arrangements for transfer of electric power between generators and networks via HVDC links - H02J 1/102: being switching converters (H02J1/108, H02J1/12 take precedence) - G05F 1/468: {characterised by reference voltage circuitry, e.g. soft start, remote shutdown} - Y02E 60/60: Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD] - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - G05F: SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract Apparatus, methods, and/or systems for controlling a power converter in a DC power transmission network. An apparatus may include means for regulating the power output of a first power converter station in a DC power transmission network in response to the DC voltage at the first power converter station exceeding a first DC voltage threshold. The first DC voltage threshold is variable based on a current direction through a first transmission line coupled to the first power converter station. ## Claims ### Claim 1 An apparatus, comprising: means for regulating a power output of a first power converter station in a DC power transmission network in response to a DC voltage at the first power converter station exceeding a first DC voltage threshold, wherein the first DC voltage threshold is variable based on a current direction through a first transmission line coupled to the first power converter station. ### Claim 2 (depends on 1) The apparatus according to claim 1, further comprising means for setting the first DC voltage threshold to one of a plurality of voltage values. ### Claim 3 (depends on 2) The apparatus according to claim 2, wherein the means for setting is configured to set the first DC voltage threshold to a first of the plurality of voltage values if the current direction is directed to a DC grid. ### Claim 4 (depends on 3) The apparatus according to claim 3, wherein the means for setting is configured to set the first DC voltage threshold to a second of the plurality of voltage values if the current direction is directed from the DC grid. ### Claim 5 (depends on 4) The apparatus according to claim 4, wherein the first of the plurality of voltage values is less than the second of the plurality of voltage values. ### Claim 6 (depends on 1) The apparatus according to claim 1, further comprising means for determining the current direction. ### Claim 7 (depends on 6) The apparatus according to claim 6, wherein the means for determining the current direction comprises a means for measuring a current magnitude at one or more locations at an interface between the first power converter station, the first transmission line, and/or a second transmission line. ### Claim 8 (depends on 1) The apparatus according to claim 1, further comprising means for measuring the voltage at the first power converter station. ### Claim 9 (depends on 1) A system, comprising: a first power converter station coupled to a first transmission line in a power transmission network; and a first controller for controlling a power output of the first power converter station into the first transmission line, wherein the first controller comprises an apparatus according to claim 1. ### Claim 10 (depends on 9) The system according to claim 9, wherein the first transmission line is further coupled to a direct current power grid. ### Claim 11 (depends on 9) The system according to claim 9, wherein the first transmission line is further coupled to a second power converter station. ### Claim 12 (depends on 11) The system according to claim 11, wherein the second power converter station is an onshore power converter station and the first power converter station is an offshore power converter station. ### Claim 13 (depends on 9) The system according to claim 9, where the power transmission network is a symmetrical monopole, an asymmetric monopole, or bipolar transmission network. ### Claim 14 A method, comprising: regulating a power output of a first power converter station in a DC power transmission network in response to a DC voltage at the first power converter station exceeding a first DC voltage threshold, wherein the first DC voltage threshold is variable based on a current direction through a first transmission line coupled to the first power converter station. ### Claim 15 (depends on 14) The method of claim 14, further comprising setting the first DC voltage threshold to one of a plurality of voltage values.