V. Bridger System Performance Requirements The Bridger system performance criteria was jointly developed by Idaho Power and PacifiCorp. Pre-Transient (Steady State) Period Bus voltages within the PP&L, UP&L & IPCo systems will be kept within 0.95 and 1.05 per unit. Equipment loadings will be kept within allowable continuous ratings. Synchronous condensers at Kinport, and Brady will be operated at the middle of their boost-buck range (same amount of dynamic range available in both directions). At high transfer levels, the Jim Bridger 345 kV 200 MVAR capacitor bank should be in-service with Jim Bridger 345 kV voltage at 1.05 per unit. Transient Period WECC Reliability Criteria For Transmission System Planning. Post-Transient Period For single contingency (N-1), the post-disturbance operating point for the critical bus must maintain a 250 MVAR reactive margin from the point of instability (nose of the QV curve) with successful remedial action scheme operation. The 345 kV bus is typically the critical bus where the 250 MVAR reactive margin is applied for loss of the Jim Bridger-Borah 345 kV line. For double contingency (N-2) in the Jim Bridger transmission system, a 200 MVAR reactive margin must be maintained at the critical busses in the Idaho Power transmission system (Borah and Kinport 345/230 kV busses), and a 125 MVAR reactive margin must be maintained at the critical busses in the PacifiCorp transmission system (Bridger and 345 kV busses). Generation deficiencies, when sufficient, will be allocated amongst all the generating within the WECC interconnected system, in accordance with inertia, governor droop settings or PMAX. Area interchange controls will be blocked. Generator reactive capability limits will be honored. Transformer taps, phase shifters and DC converter taps will be assumed to operate in automatic mode, if so equipped. No manual (local/remote) reactor or capacitor switching occurs in the Bridger transmission system during the post-transient period. However, shunt devices
V. Bridger System Performance Requirements The Bridger system performance criteria was jointly developed by Idaho Power and PacifiCorp. Pre-Transient (Steady State) Period Bus voltages within the PP&L, UP&L & IPCo systems will be kept within 0.95 and 1.05 per unit. Equipment loadings will be kept within allowable continuous ratings. Synchronous condensers at Kinport, and Brady will be operated at the middle of their boost-buck range (same amount of dynamic range available in both directions). At high transfer levels, the Jim Bridger 345 kV 200 MVAR capacitor bank should be in-service with Jim Bridger 345 kV voltage at 1.05 per unit. Transient Period WECC Reliability Criteria For Transmission System Planning. Post-Transient Period For single contingency (N-1), the post-disturbance operating point for the critical bus must maintain a 250 MVAR reactive margin from the point of instability (nose of the QV curve) with successful remedial action scheme operation. The 345 kV bus is typically the critical bus where the 250 MVAR reactive margin is applied for loss of the Jim Bridger-Borah 345 kV line. For double contingency (N-2) in the Jim Bridger transmission system, a 200 MVAR reactive margin must be maintained at the critical busses in the Idaho Power transmission system (Borah and Kinport 345/230 kV busses), and a 125 MVAR reactive margin must be maintained at the critical busses in the PacifiCorp transmission system (Bridger and 345 kV busses). Generation deficiencies, when sufficient, will be allocated amongst all the generating within the WECC interconnected system, in accordance with inertia, governor droop settings or PMAX. Area interchange controls will be blocked. Generator reactive capability limits will be honored. Transformer taps, phase shifters and DC converter taps will be assumed to operate in automatic mode, if so equipped. No manual (local/remote) reactor or capacitor switching occurs in the Bridger transmission system during the post-transient period. However, shunt devices
IPCO_Reliability_Criteria_.docx