期刊
IEEE TRANSACTIONS ON SUSTAINABLE ENERGY
卷 12, 期 1, 页码 169-178出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TSTE.2020.2988571
关键词
Sensitivity; Fluctuations; Voltage control; Regulators; Indexes; Bibliometrics; Australia; Open-delta step voltage regulator; unbalanced distribution network; solar photovoltaic (PV); tap changer; voltage variation; voltage sensitivity
资金
- Australian Federal Government's Department of Education AGL Solar PV Education Investment Fund Research Infrastructure Project
- University of Queensland
- AGL
- First Solar
- University of New South Wales
- Australian Research Council DECRA project [DE180101118]
- Australian Research Council [DE180101118] Funding Source: Australian Research Council
The article proposes a novel method based on line-to-line voltage sensitivity and time series evaluation to quantify the interactions between PV/load fluctuations and tap operations. The accuracy of this method is verified with measured data from a real-life unbalanced distribution network with high PV penetration. This method is further used to statistically quantify the causes of excessive tap operations with half-year field data under the support of the local utility and the PV plant owner, providing valuable insights for utilities to manage voltage profiles and tap maintenance for remote distribution networks with high PV penetration.
Recently, utility-scale photovoltaic (PV) plants in remote areas are drastically increasing due to abundant and low-priced land. These remote areas are usually connected to zone substations through long weak feeders with open-delta step voltage regulators (SVRs) installed in the middle to regulate downstream voltages. However, frequent PV and load power fluctuations can lead to undesirable voltage variations and hence excessive tap operation issues. Currently, it is not clear about the percentage of responsibility by load or PV fluctuations to excessive tap operations. In this article, a novel method based on line-to-line voltage sensitivity and time series evaluation is proposed to respectively quantify the interactions between PV/load fluctuations and tap operations. The accuracy of this method is firmly validated with the measured data from a real-life unbalanced distribution network with high PV penetration. Further, this proposed method is implemented to statistically quantify the causes of excessive tap operations with half-year field data under the support of the local utility and the PV plant owner. The investigation results can provide valuable insights for utilities to better manage the voltage profiles and tap maintenance for remote distribution networks with high PV penetration.
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