studies carried out by AEMO have indicated the possibility of these oscillations in three of the five NEM regions. One example is an area referred to as the West Murray Area, which encompasses the northwest of the Victoria region and t he sout hwest of t he New Sout h Wa les region, as shown in Figure 4. This area has many IBRs already connected, and many more are in the process of connection. West Murray Zone New South Wales Victoria West Murray Zone Transmission Infrastructure 500-kV Transmission Line 330-kV Transmission Line 275-kV Transmission Line 220-kV Transmission Line 132/110-kV Transmission Line 66-kV Transmission Line dc Link figure 4. The West Murray Area. (Source: AEMO; used with permssion.) 50 ieee power & energy magazine september/october 2021