Cost Allocation of Voltage Unbalance in Distribution Networks

Paper


Kennedy, Joel, Morcos, Martina and Lo, Assane. 2020. "Cost Allocation of Voltage Unbalance in Distribution Networks." 19th International Conference on Harmonics and Quality of Power (ICHQP 2020). Dubai, United Arab Emirates 06 - 07 Jul 2020 https://doi.org/10.1109/ICHQP46026.2020.9177935
Paper/Presentation Title

Cost Allocation of Voltage Unbalance in Distribution Networks

Presentation TypePaper
AuthorsKennedy, Joel (Author), Morcos, Martina (Author) and Lo, Assane (Author)
Journal or Proceedings TitleProceedings of International Conference on Harmonics and Quality of Power, ICHQP
ERA Conference ID60445
Number of Pages5
Year2020
ISBN9781728136974
Digital Object Identifier (DOI)https://doi.org/10.1109/ICHQP46026.2020.9177935
Web Address (URL) of Paperhttps://ieeexplore.ieee.org/document/9177935
Conference/Event19th International Conference on Harmonics and Quality of Power (ICHQP 2020)
International Conference on Harmonics and Quality of Power (ICHQP)
Event Details
19th International Conference on Harmonics and Quality of Power (ICHQP 2020)
Event Date
06 to end of 07 Jul 2020
Event Location
Dubai, United Arab Emirates
Event Details
International Conference on Harmonics and Quality of Power (ICHQP)
ICHQP
Abstract

The proliferation of distributed generation has increased the complexity of voltage regulation in distribution networks. Asymmetrical line impedance, the presence of single phase generation and unbalanced loading can produce voltage unbalance. The performance of high efficiency three-phase induction machines drops significantly with voltage unbalance. Currently, there is no mechanism to ensure that a customer in ownership of a voltage unbalance sensitive load is compensated for excessive voltage unbalance. In response, the authors propose a market framework where compensation is to be paid between offending and affected customers where voltage unbalance limits are exceeded. The ideal compensation payments are calculated using Shapley values, but this technique is found to be prohibitively computationally expensive for large numbers of loads. An approximate method using voltage unbalance sensitivities is proposed as a remedy. The approximate method is compared with the Shapley value method using a nine load bus case study with a voltage unbalance violation compensation cost of $10. The results show a $2.11 root mean squared error for individual voltage unbalance compensation calculations over 1000 randomly generated cases with an unacceptable voltage unbalance. The diversification of compensation payments over many violations substantially reduced the error.

Keywordsdistribution networks; distributed generation; voltage unbalance; Shapley value method
ANZSRC Field of Research 2020400805. Electrical energy transmission, networks and systems
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Byline AffiliationsUniversity of Wollongong
Institution of OriginUniversity of Southern Queensland
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