Search International and National Patent Collections

1. (WO2018086927) A DC POWER SYSTEM SEGREGATED INTO DIFFERENT PROTECTION ZONES

Pub. No.:    WO/2018/086927    International Application No.:    PCT/EP2017/077724
Publication Date: Fri May 18 01:59:59 CEST 2018 International Filing Date: Tue Oct 31 00:59:59 CET 2017
IPC: H02H 3/05
B63H 23/24
H02H 7/26
H02H 9/02
Applicants: ABB SCHWEIZ AG
Inventors: LINDTJØRN, John Olav
Title: A DC POWER SYSTEM SEGREGATED INTO DIFFERENT PROTECTION ZONES
Abstract:
The present disclosure relates to a DC power system (1), comprising: a main bus (3), a plurality of power delivery devices (G1-G8, 11-15) configured to be connected to the main bus (3), a first zone partitioning device (7a), and a control system (9), wherein the first zone partitioning device (7a) is configured to segregate the main bus(3) into a first protection zone (Z2) which is a section of the main bus (3) to which power delivery devices (11-15) with a fault clearance requirement in a first time range are configured to be connected, and a second protection zone(Z1) which is a section of the main bus (3) with a fault clearance requirement in a second time range, which includes times that are higher than any time included in the first time range, and to which no power delivery device (G5-G8, 11-15) with a fault clearance requirement in the first time range is configured to be connected, wherein the control system (9) is configured to control the first zone partitioning device (7a) to allow load current to flow from the first protection zone (Z2) to the second protection zone (Z1) and to limit fault current flow from the first protection zone (Z2) to the second protection zone (Z1).