SIERRA power flow areas Greenlee - Copper River 345-kV Line # 1 AZ Phelps-Dodge Multiple low voltage conditions on & 345-kV buses in the Phelps-Dodge power flow zone in Arizona San Juan - Ojo Line #1 NM ZonePN Multiple high voltage conditions on buses in power flow zones ZoneNO and ZonePN in New Mexico KMO - KMO SC 287-kV Line # 1 BCH ALCAN Multiple low voltage conditions on buses in the B.C. Hydro and ALCAN power flow zones in the B.C. Hydro MATLB 240-kV Phase Shifter AB Multiple high voltage conditions on & 240-kV buses in Alberta's Glenwood and Montana's GTFALLS power flow zones S. Creek - BCKSP_01 240-kV Line # 18 AB AIES-Fort McMurray Multiple low voltage conditions on buses in Alberta's power flow zones Edmonton/Fort Sask Annex & Fort McMurray Conklin - BCKSP_01 240-kV Line # 71 BCH ALCAN Multiple low voltage conditions on buses in Alberta's power flow zones Edmonton/Fort Sask Annex & Fort McMurray Glencany 230kV Phase Shifter AZ WAPA-DSW Multiple high voltage conditions on buses in Arizona's WAPA-DSW power flow zones NIC 230 - AJX 230P 230-kV Line # 1 BCH BC HYDRO Multiple low voltage conditions on buses in B.C. Hydro power flow area and zones Frannie - Yellow Tlp 230-kV Line # 1 PACE WY NO EA Multiple high voltage conditions on buses in PacifiCorp East power flow zones Control - Inyo Line # 1 CA_South SCE KRAMER Multiple low voltage conditions on buses in the southern California and Los Angeles Department of Water & Power power flow areas Blackglade - Shiprock 230-kV Line # 1 WAPA R.M. ZoneR4 Multiple high voltage conditions on buses in WAPA R.M. power flow zones There were 23 Category B contingencies which caused singular voltage concerns in the Northwest, Nevada, Arizona, California, Alberta, British Columbia, Colorado and Montana portions of the Western Interconnection. Figure 37 provides a view of all of the concerning bus voltages resulting from the Category B contingencies, including both the buses associated with
SEV Generator # 1 BCH BC HYDRO Multiple >5% voltage deviations on 240-kV buses in Alberta's Backbone power flow zone MATLB Transformer # 1 AB Multiple >5% voltage deviations on 230-kV buses in Montana's Great Falls power flow zone Copper River - Frisco 230-kV Line # 1 AZ Phelps-Dodge Multiple >5% voltage deviations on 230-kV buses in Arizona's Phelps-Dodge power flow zone Glencany 230-kV Phase Shifter AZ WAPA-DSW Multiple >5% voltage deviations on 230-kV buses in Arizona's WAPA-DSW power flow zone Greenlee - Copper River 345-kV Line # 1 AZ Phelps-Dodge Multiple >5% voltage deviations on 230-kV buses in Arizona's Phelps-Dodge power flow zone Parker - Gene 230-kV Line # 1 AZ WAPA-DSW Multiple >5% voltage deviations on 230-kV buses in the Municipal Water Department portion of southern California Edison in southern California NIC - AJX Line # 1 BCH BC HYDRO Multiple >5% voltage deviations on 230-kV buses in British Columbia's B.C. Hydro power flow zone Mill Creek Phase Shifter MT BUTTE_MT Multiple >5% voltage deviations on 230-kV buses in Montana's Butte power flow zone Pillar - Burnham 230-kV Line # 1 NM ZoneWH Multiple >5% voltage deviations on 230-kV buses in New Mexico's ZoneWH power flow zone Cascade Tap - Sherwood Line # 1 NWUS Portland General - BES S/S Multiple >5% voltage deviations on 230-kV buses in the Portland Area of the Northwest
MT Mill Creek 230-kV Phase Shifter NV RSHASC1 - RSHASC2 500-kV Line # 1 NM Pillar - Burnham 230-kV Line # 1 San Juan - Ojo 345-kV Line #1 NWUS Cascade Tap - Sherwood 230-kV Line # 1 Fairmont - Port Ang 230-kV Line # 1 Garrison - Taft 500-kV Line # 1 Garrison - Taft 500-kV Line # 2 Grassland - Cedar Springs 500-kV Line # 1 Happy Valley - Port Ang 230-kV Line # 1 Lane - Wendson 230-kV Line # 2 Santiam - Tmbl Creek 230-kV Line # 1 PACE AEMNC 500-kV Line # 1 Clover 500-/345-kV Transformer # 1 Frannie - Yellow Tlp 230-kV Line # 1 Grass Creek - Thermo Pl 230-kV Line # 1 Pinto PS - Four Corners 345-kV Line # 1 PS CO Gorepass - Hayden 230-kV Line # 1 Sierra Border Town 345-kV Phase Shifter Hill Top 345-/230-kV Transformer # 1 RBFLC - Falcon 345-kV Line # 1 Valmy - Falcon 345-kV Line # 1 CA_South Control - Inyo 115-kV Line # 1 WAPA R.M. Blackglade - Shiprock 230-kV Line # 1 Craig - Meeker 345-kV Line # 1 Hayden - Foidelck 230-kV Line # 1 Weld PS - Weld LM 115-kV Line # 1