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Handbook for Planning Data Services <br />5. ERCOT Power Flow Base Planning Cases (Data Set A and Data Set B) <br />Description: <br />Make available Owner transmission facility data required for updating the ERCOT <br />power flow cases. Section 6.1 of the ERCOT Planning Guide states: "Each TSP, or its <br />Designated Agent, shall provide its respective transmission network steady -state model <br />data, including load data. To meet the requirements of Section 6.1, LCRA and Owners <br />will perform the following: <br />Owner Shall: <br />1. Provide facility data to LCRA required by ERCOT. This includes but is not limited to: <br />transmission line parameters /characteristics, autotransformer data, station <br />location /bus configuration, facility ratings, and switching device ratings. I ne <br />parameters / characteristics and other data provided by the Owner shall be in the <br />following formats. <br />Transmission line parameters /characteristics: <br />liV, <br />From Station <br />To Station <br />R <br />K <br />B <br />Rate A <br />Rate B <br />Rate l3 <br />a Len <br />8.719 <br />138 <br />Lockhart <br />Mendoza <br />0.00682 <br />0.03560 <br />0.01051 <br />220 <br />220 <br />220 <br />9.32 <br />!Vole: Minimum o-aigit preuislun requlruct Vr weauy ar w rr ruuci n, n, at 1U u va.uoa. <br />Autotransformer data: <br />High -side (H) winding rated voltage <br />138 <br />kV <br />Low -side (L) winding rated voltage <br />69 <br />kV <br />Tertiary (T) winding rated voltage <br />13.2 <br />kV <br />Winding leakage impedance HA <br />8.719 <br />% <br />(3- Phase) base MVA for H -L <br />36 <br />MVA <br />(3- Phase) load losses between H -L <br />78,038 <br />W <br />Winding leakage impedance H -T <br />13.389 <br />% <br />(3- Phase) base MVA for H -T <br />12.6 <br />MVA <br />(3- Phase) load losses between H -T <br />39,098 <br />W <br />Winding leakage impedance L -T <br />9.478 <br />% <br />(3- Phase) base MVA for L -T <br />12.6 <br />MVA <br />(3- Phase) load losses between L T <br />38,719 <br />W <br />Note: Information available on autotranstormer manufacturer test report. <br />7 I Pag, Rev. 0 <br />