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1. (WO2017064148) IMPROVEMENTS IN OR RELATING TO THE PROTECTION OF POWER TRANSFORMERS
PCT Biblio. Data
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Pub. No.:
WO/2017/064148
International Application No.:
PCT/EP2016/074517
Publication Date:
20.04.2017
International Filing Date:
12.10.2016
IPC:
H02H 3/08
(2006.01) ,
H02H 7/04
(2006.01) ,
H02H 9/00
(2006.01)
H
ELECTRICITY
02
GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
H
EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
3
Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection
08
responsive to excess current
H
ELECTRICITY
02
GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
H
EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
7
Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
04
for transformers
H
ELECTRICITY
02
GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
H
EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
9
Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
Applicants:
GENERAL ELECTRIC TECHNOLOGY GMBH
[CH/CH]; Brown Boveri Strasse 7 CH-5400 Baden, CH
Inventors:
HA, Hengxu
; GB
WENG, Yu
; GB
BALAKRISHNAN, Gajendiran
; GB
Agent:
CLEARY, Fidelma
; GB
Priority Data:
15275215.0
12.10.2015
EP
Title
(EN)
IMPROVEMENTS IN OR RELATING TO THE PROTECTION OF POWER TRANSFORMERS
(FR)
AMÉLIORATIONS APPORTÉES OU SE RAPPORTANT À LA PROTECTION DE TRANSFORMATEURS DE PUISSANCE
Abstract:
(EN)
In the field of power transformer protection there is provided a method of protecting a power transformer comprising the steps of: (a)monitoring an external fault indication signal (12A, 12B, 12C); (b)carrying out locally a fault determination; (c)carrying out locally an inrush current determination; and (d)issuing a final trip signal (48) to protect the power transformer if: (i)the external fault indication signal (12A, 12B, 12C) identifies that a fault has occurred and the locally carried out fault determination confirms that a fault has occurred; or (ii)the external fault indication signal (12A, 12B, 12C) identifies that a fault has occurred and the locally carried out fault determination identifies that no fault has occurred but after a predetermined delay the locally carried out inrush current determination confirms the absence of an inrush current.
(FR)
Dans le domaine de la protection de transformateurs de puissance, l'invention concerne un procédé de protection d'un transformateur de puissance comprenant les étapes consistant : (a) à surveiller un signal d'indication de défaut externe (12A, 12B, 12C); (b) à réaliser localement une détermination de défaut; (c) à réaliser localement une détermination de courant d'appel; et (d) à délivrer un signal de déclenchement final (48) pour protéger le transformateur de puissance si : (i) le signal d'indication de défaut externe (12A, 12B, 12C) identifie qu'un défaut s'est produit et la détermination de défaut réalisée localement confirme qu'un défaut s'est produit; ou (ii) le signal d'indication de défaut externe (12A, 12B, 12C) identifie qu'un défaut s'est produit et la détermination de défaut réalisée localement identifie qu'aucun défaut ne s'est produit mais après un retard prédéterminé, la détermination de courant d'appel réalisée localement confirme l'absence d'un courant d'appel.
Designated States:
AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language:
English (
EN
)
Filing Language:
English (
EN
)