Invention Grant
- Patent Title: Protection system for electrical power distribution system using directional current detection and logic within protective relays
- Patent Title (中): 在保护继电器内使用方向电流检测和逻辑的配电系统保护系统
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Application No.: US13880372Application Date: 2011-10-12
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Publication No.: US09413164B2Publication Date: 2016-08-09
- Inventor: Thomas Hoeven
- Applicant: Thomas Hoeven
- Applicant Address: DE Munich
- Assignee: SIEMENS AKTIENGESELLSCHAFT
- Current Assignee: SIEMENS AKTIENGESELLSCHAFT
- Current Assignee Address: DE Munich
- Agency: Slayden Grubert Beard PLLC
- Priority: EP10187884 20101018
- International Application: PCT/EP2011/067759 WO 20111012
- International Announcement: WO2012/052325 WO 20120426
- Main IPC: H02H7/22
- IPC: H02H7/22 ; H02H3/08 ; B63H23/24 ; B63H25/42 ; H02H3/05 ; H02H7/26

Abstract:
A power distribution system for a dynamically positioned vessel may include: a plurality of busses including a first bus to which a load is connectable; a plurality of switches including a first switch and a second switch, wherein the plurality of busses is connected via the switches in a interjacent manner to form a ring, the first bus is connected between the first switch and the second switch, and the power distribution system is configured to concurrently open the first switch and second switches, if a first current flowing via the first switch towards the first bus is above a predetermined current threshold for longer than a predetermined time and a second current flowing via the second switch towards the first bus is above the predetermined current threshold for longer than the predetermined time, thereby disconnecting the first bus from the ring while all other buses remain connected together.
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