Quantifying the Effect of Air Conditioning Dynamics on Power System Transient Stability Limits

Dynamic load characteristics are becoming an increasingly important consideration for power systems with a large penetration of residential air conditioning. Residential air conditioner stalling in response to faults plays a large role in Fault-Induced Delayed Voltage Recovery events. To further study this connection, this work seeks to tie load parameter variations directly to changes in assessed transient stability limits. This connection is first considered at an area-wide level, before a bus-level locational sensitivity metric is introduced. Test results allow for validation of common assumptions about the effects of air conditioner motor stalling, as well as identification of which busses are most critical to the system response near a stability limit.