TPCPF: A Three Phase Continuation Power Flow for Voltage Stability Analysis of the Distribution Systems with DERs

Abstract

This paper presents a three-phase unbalanced continuation power flow tool (TPCPF) to analyze the voltage stability of distribution systems with high penetration of distributed energy resources (DER). Analyzing distribution system voltage stability with DER will allow high penetration of renewable energy required for sustainability. Developed algorithm can analyze voltage stability for both the meshed and radial system as well as for the balanced and unbalanced three-phase distribution systems. Developed tool allows the voltage stability analysis of the system in order to facilitate the proper planning, operation, control and management of the distribution system. The impact of DER) on the voltage stability of several test cases have been analyzed considering constant power (PQ) and regulated-voltage (PV) modes of operation of DER units. Results demonstrate that developed continuation power flow tool can be used to perform voltage stability analysis for active distribution systems.