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Assessing the Effects of DER on Voltages Using a Smart Meter-Driven Three-Phase LV Feeder Model

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The increasing number of residential distributed energy resources (DER) is driving the need for distribution companies to routinely assess potential voltage violations due to excessive power injections. However, this task can be quite challenging in low voltage (LV) feeders due to the limited availability of modelling data. To this end, this work proposes a practical approach to assess the effects of DER on voltages by exploiting historical time-series measurements from smart meters and head of the feeder. First, the impedances of three-phase feeders are deter-mined assuming knowledge of feeder topology and service cable parameters. Then, the resulting smart meter-driven model is used to compute voltages due to potential DER injections. The performance of the proposed methodology is assessed using a realistic Australian three-phase LV feeder with 40 single-phase customers. Results show that, while there is some error in the calculated impedances, customer voltages are sufficiently accurate for DER management purposes.

Author(s):

Yiqing Wang    
The University of Melbourne
Australia

Michael Z. Liu    
The University of Melbourne
Australia

Luis F. Ochoa    
The University of Melbourne
Australia

 

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