workbook. GIC blocking device in neutral of Winding 1. = 0, no GIC blocking device present REs will provide this = 1, GIC blocking device present through EPPRE, For an autotransformer, if either GICBDI=1 GICBDI and TSPs will provide or GICBDJ=1, that this value through the autotransformer is treated as it has GIC workbook. blocking device present. GICBDI = 0 by default. GIC blocking device in neutral of Winding 2. = 0, no GIC blocking device present REs will provide this = 1, GIC blocking device present value through EPPRE, For an autotransformer, if either GICBDI=1 GICBDJ and TSPs will provide or GICBDJ=1, that this value through the autotransformer is treated as it has GIC workbook. blocking device present. GICBDJ = 0 by default. GIC blocking device in neutral of Winding 3. REs will provide this = 0, no GIC blocking device present value through EPPRE, GICBDK = 1, GIC blocking device present and TSPs will provide GICBDK = 0 for two winding transformers this value through the GICBDK = 0 by default. workbook. Alphanumeric identifier specifying vector group based on transformer winding connections and angles. VECGRP is 12 blanks by default. If vector group is specified in that data will be used and it is not needed to be specified here. As far as GIC calculations are concerned, winding grounding REs will provide this connection information is used; its value through EPPRE, VECGRP clock angles are not used. and TSPs will provide Specify VECGRP considering the winding this value through the order I, J, K defined on this record. workbook. For autotransformers, bus with lower base bus voltage is treated as common winding bus. For three winding autotransformers, windings on bus I and bus J form autotransformer. Winding connection designations
workbook. GICBDI GIC blocking device in neutral of Winding 1. = 0, no GIC blocking device present = 1, GIC blocking device present For an autotransformer, if either GICBDI=1 or GICBDJ=1, that autotransformer is treated as it has GIC blocking device present. GICBDI = 0 by default. REs will provide this through EPPRE, and TSPs will provide this value through the workbook. GICBDJ GIC blocking device in neutral of Winding 2. = 0, no GIC blocking device present = 1, GIC blocking device present For an autotransformer, if either GICBDI=1 or GICBDJ=1, that autotransformer is treated as it has GIC blocking device present. GICBDJ = 0 by default. REs will provide this value through EPPRE, and TSPs will provide this value through the workbook. GICBDK GIC blocking device in neutral of Winding 3. = 0, no GIC blocking device present = 1, GIC blocking device present GICBDK = 0 for two winding transformers GICBDK = 0 by default. REs will provide this value through EPPRE, and TSPs will provide this value through the workbook. VECGRP Alphanumeric identifier specifying vector group based on transformer winding connections and angles. VECGRP is 12 blanks by default. If vector group is specified in that data will be used and it is not needed to be specified here. As far as GIC calculations are concerned, winding grounding connection information is used; its clock angles are not used. Specify VECGRP considering the winding order I, J, K defined on this record. For autotransformers, bus with lower base bus voltage is treated as common winding bus. For three winding autotransformers, windings on bus I and bus J form autotransformer. Winding connection designations REs will provide this value through EPPRE, and TSPs will provide this value through the workbook.
08._Oncor_07012016_comments_Draft_GIC_System_Model_Procedure_Manual_PGDTF_20160628_PLWG_20160629_red_line_version.docx