公开(公告)号：US10074494B2

公开(公告)日：2018-09-11

申请号：US14581198

申请日：2014-12-23

Applicant: ABB TECHNOLOGY LTD

Inventor： Anoop Parapurath ,  Anil Talluri

IPC: H02H3/027 ,  H01H9/56 ,  H01H71/12

CPC classification number: H01H9/56 ,  H01H71/123

Abstract: A method is disclosed of performing point on wave switching in a multiphase electrical system having a first circuit breaker connected a first bus, the first circuit breaker being operated by a first controller, a second circuit breaker connected to a second bus, the second circuit breaker being operated by a second controller, and a subsystem transferred from the first bus to the second bus. The method can include receiving, by the second controller, system characteristics data of the subsystem, estimating, by the second controller, a time for switching based on the received system characteristics data of the subsystem and operating time of the second circuit breaker, and operating, by the second controller, the second circuit breaker at the estimated time for switching, for switching the subsystem.

公开(公告)号：US09923375B2

公开(公告)日：2018-03-20

申请号：US14676517

申请日：2015-04-01

Applicant: ABB TECHNOLOGY LTD

Inventor： Anil Talluri ,  Gajanan Lade ,  Rahul Radhakrishnan ,  Sethuraman Ganesan

IPC: H02J3/42

CPC classification number: H02J3/42 ,  H02J9/062 ,  H02J2009/068 ,  Y10T307/696

Abstract: A method for synchronizing and connecting a first sub power system with a second sub power system with an intelligent electronic device (IED) by use of at least one switching device between the first sub power system and the second sub power system in an electrical power system is provided. The IED monitors power supply parameters such as voltage magnitude, phase and other derived parameters such as voltage and phase differences in the first sub power system and the second sub power system to identify at least one instance for fast bus transfer where the two sub systems have acceptable differences in magnitude and phase. The IED performs phase shifting and voltage magnitude correction in anticipation for synchronizing power supplies on connection at the identified instance.