公开(公告)号：US12301131B2

公开(公告)日：2025-05-13

申请号：US18163370

申请日：2023-02-02

Applicant: ABB Schweiz AG

Inventor： Ari Wahlroos ,  Janne Altonen ,  Janne Leminen

IPC: H02H9/08 ,  H02M1/12 ,  H02M7/487

Abstract: A method and apparatus for controlling a neutral point voltage of a three-phase resonant-earthed electric network, the apparatus including determining means configured to determine a target value for the neutral point voltage of the three-phase resonant-earthed electric network, calculating means configured to calculate at least one phase-specific control admittance or a neutral point specific control admittance required for controlling the neutral point voltage of the three-phase resonant-earthed electric network from a prevailing value to the determined target value, and admittance means configured to add the calculated at least one phase-specific control admittance between a ground and a respective phase of the three-phase resonant-earthed electric network or the calculated neutral point specific control admittance between the ground and a neutral point of the three-phase resonant-earthed electric network.

公开(公告)号：US20230318484A1

公开(公告)日：2023-10-05

申请号：US18163370

申请日：2023-02-02

Applicant: ABB Schweiz AG

Inventor： Ari Wahlroos ,  Janne Altonen ,  Janne Leminen

IPC: H02M7/487 ,  H02H9/08 ,  H02M1/12

CPC classification number: H02M7/487 ,  H02H9/08 ,  H02M1/12

Abstract: A method and apparatus for controlling a neutral point voltage of a three-phase resonant-earthed electric network, the apparatus including determining means configured to determine a target value for the neutral point voltage of the three-phase resonant-earthed electric network, calculating means configured to calculate at least one phase-specific control admittance or a neutral point specific control admittance required for controlling the neutral point voltage of the three-phase resonant-earthed electric network from a prevailing value to the determined target value, and admittance means configured to add the calculated at least one phase-specific control admittance between a ground and a respective phase of the three-phase resonant-earthed electric network or the calculated neutral point specific control admittance between the ground and a neutral point of the three-phase resonant-earthed electric network.