ALTERNATIVES FOR BLOCKING DIRECT-CURRENT IN AC SYSTEM NEUTRALS AT THE RADISSON LG2 COMPLEX

被引：27

作者：

EITZMANN, MA

WALLING, RA

HUYNH, H

GRANGER, M

SUBLICH, M

KHAN, A

THANAWALA, HL

DUTIL, A

KAPPENMAN, JG

机构：

[1] HYDRO QUEBEC,DEPT SYST PLANNING,MONTREAL,QUEBEC,CANADA

[2] GEC ALSTHOM TRANSMISS & DISTRIBUT PROJECTS LTD,STAFFORD,ENGLAND

来源：

IEEE TRANSACTIONS ON POWER DELIVERY | 1992年 / 7卷 / 03期

关键词：

NEUTRAL GROUNDING; TRANSFORMER SATURATION; HVDC GROUND ELECTRODES; NEUTRAL BLOCKING DEVICES; GEOMAGNETICALLY-INDUCED CURRENTS (GIC); METAL-OXIDE VARISTORS (MOV);

D O I：

10.1109/61.141850

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Severe offset saturation results from the passage of direct current through power transformers. Such direct current can arise from geomagnetic disturbances, or resistive coupling of the substation ground to HVDC earth electrodes. This paper documents the development of alternative approaches for the design and application of blocking devices placed between transformer neutrals and the substation ground. System constraints on the impedance and overvoltage limitation of the neutral blocking device (NBD) are covered. Three alternative NBD schemes are developed and optimized. System performance of the NBD is discussed, as are the practical implementation considerations for this unconventional equipment application. Although the paper focuses on the NBD requirements of Hydro-Quebec's Radisson/LG2 complex, the fundamental information is applicable to any situation where dc must be blocked from a power transformer neutral in a system designed for effectively-grounded operation.

引用

页码：1328 / 1337

页数：10