Transient Voltage Stability Effects on Hosting Capacity of Behind-the-Meter Devices

Abstract

Transient stability effects from distributed energy resources (DER) are being seen on the bulk electric system as there has been rapid development of these resources in areas such as California and the northeast United States. Other behind-the-meter devices include dynamic loads, which are also known to cause transient stability effects largely due to induction motors on voltage stability. Hosting capacity studies for DERs typically consist of steady state analysis of the system and do not include effects from dynamic loads. This paper examines the transient voltage stability effects of both DERs and dynamic loads and how these effects can change the hosting capacity. Results show that the addition of dynamic loads reduces the hosting capacity of DERs when hosting capacity is based on minimum voltage swing limits. However, the introduction of DERs to a system with dynamic loads improves the transient voltage stability.