Secondary Network Parameter Estimation for Distribution Transformers

摘要

Time series active power and voltage data recorded by electricity smart meters in the US have shown to provide immense value to utilities beyond customer billing when coupled with advanced analytics. Distribution system secondary circuit topology and parameter estimation (DSPE) is one such use-case that has been developed extensively. DSPE utilizes smart meter voltage and active and reactive power information to determine the topology and cable impedances of the low-voltage network. However, most smart meters do not record reactive power information. While the impact of unknown power factors is minimal on estimating low-voltage cable impedances, the information becomes critical to estimate transformer impedances. This paper explores how the DSPE algorithm can be extended for single-phase distribution transformers without power factor measurements at the customers.