july/august 2019 ieee power & energy magazine 37 MAR EA SA S TA S G Retired 689 (299/-118) BB OT SG PQ S S Getting Congested SCR Around 1,600 Above 2,700 G OM Added 603 (306/-122), S 309 (156/-138) MEXICO To TJI (Neighboring System) Getting ML Congested MS SX AR ES G Added 565 (306/-120) BUE figure 2. A conceptual illustration of system power flow patterns and reactive source shift. Gen: generator. Note: Map not to scale. Underlining system not shown in this map. Load Center Area (Orange) G Retiring 946 (469/-112) SO G Retired 2,200 (1,100/-800) LNL CP TB 1,200 600 ECO OCO G G S Lines Under Constructions To EC (Neighboring System) Renewable Resource Zone (Green) IV From Neighboring System To ROA (Neighboring System) Underlining System 230-kV Substations and Lines 500-kV Substations and Lines Recent Heavy Summer Peak Flows Typical Heavy Summer Peak Flows in the Past Retired Thermal Gen New Gas-Fired Gen New Phase-Shifting Transformer New Synchronous Condenser/SVC 230-kV Flow Path to North