Comparing load estimation methods for distribution system analysis

Load allocations for distribution system analysis is one area in system modelling where simple, generalized assumptions are commonly made by distribution planners for lack of better data. Most of the time, the assumptions are based on measurements taken only at the distribution substation bus or at the feeder head. With widespread application of advanced metering infrastructure (AMI) technologies, loading estimates for distribution system analysis can now be based on actual measurements taken at individual loads. This can result in greatly improved accuracy in distribution power flow analysis. Three techniques for load allocation are analyzed and compared to the case with actual AMI data for all customers. Selected details of the test circuit and analysis process are provided.