Impact of Renewable Based Microgrid Supply/Demand Profiles on Low Voltage Distribution Networks

Zehir, Mustafa Alparslan; Batman, A.; Sonmez, Mehmet Ali; Font, Aytug; Tsiamitros, Dimitrios; Stimoniaris, D.; Kollatou, T.; Bağrıyanık, Mustafa; Özdemir, Aydoğan; Dialynas, E.N.

doi:10.1016/j.egypro.2016.11.278

Cited by 13 publications

(9 citation statements)

References 6 publications

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“…The cumulative voltage variations subjected to load and PV are calculated by (11). If the combined cumulative voltage variation by load and PV violates the deadband for a time duration of ∆ 1 (shown in Fig.6) and consequently trigger tap changes, then the percentages of tap changing responsibility by the load, PV and upstream fluctuations will be calculated based on their contribution to voltage variations.…”

Section: Tap Operation Evaluationmentioning

confidence: 99%

“…load changes [8][9][10]. However, with more PV integrated into rural areas, PV power fluctuations can lead to considerable voltage variations due to high R/X ratio in distribution networks [11], which further result in excessive tap operations. For utility-scale PV integration, there usually is a connection agreement to specify the voltage variation range, which is achieved through the cooperation between utility and PV owner.…”

Section: Introductionmentioning

confidence: 99%

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An Excessive Tap Operation Evaluation Approach for Unbalanced Distribution Networks With High PV Penetration

Bai

Yan

Saha

et al. 2021

IEEE Trans. Sustain. Energy

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Abstract-Recently, utility-scale photovoltaic (PV) plants in remote areas are drastically increasing due to abundant and lowpriced 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 paper, 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 reallife 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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Section: Tap Operation Evaluationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An Excessive Tap Operation Evaluation Approach for Unbalanced Distribution Networks With High PV Penetration

Bai

Yan

Saha

et al. 2021

IEEE Trans. Sustain. Energy

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“…Dealing with individual prosumers causes an increased bidirectional power flow, which has an impact on the bus voltages and on the power losses, all the more severe in LV networks due to high ratio of active/reactive power of the lines [37]. In fact, the bidirectional traffic on the lines is a problem for DNOs "particularly in radial LV networks, where renewable intermittency and bidirectional power flow may cause critical problems such as under/over voltages, line overloads and high energy losses.…”

Section: Residential Microgrids Versus Dnosmentioning

confidence: 99%

Economic Performance of Using Batteries in European Residential Microgrids under the Net-Metering Scheme

et al. 2019

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Decentralized energy production offers an increased share of renewable energy and autonomy compared to the conventional, grid-only solution. However, under the net-metering scheme, the energy losses in batteries translate into financial losses to an investor seeking to move away from grid-only electricity and set up a residential PV+Battery microgrid. Our paper examines a hypothetical support scheme for such a project, designed to balance the economic disadvantage through partially supporting the acquisition of batteries, and thus ensure that the microgrid solution is more attractive than no investment. For this we develop four case studies based on experiments carried out in Greece, Italy, Denmark and Finland. Using the minimization of the Net Present Cost for each project, we compare the PV+Battery solution to the grid-only scenario over 25 years, for a range of electricity prices. The results illustrate first how the success of this project depends on the price of electricity. Second, we find that under current conditions in the respective countries the need for battery support varies between zero in Denmark and 86% in Italy, which reflects how the disadvantages of net metering can only be counterbalanced by either very high electricity price or very high solar resource. Our paper contributes thus to the discussion about the favourable environment for batteries in residential microgrids.

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“…In [7], the effects of a renewable source within the microgrid on LV distribution network operation were investigated. Simulations of daily PV and load profiles were made to analyze fluctuations in utility voltage and line losses.…”

Section: Introductionmentioning

confidence: 99%

“…The findings indicated that the utility voltage was impacted by PV and load fluctuations, while line losses in the LV network were also observed. The authors determined that it was essential to utilize an advanced controller for eliminating these fluctuations [7].…”

Section: Introductionmentioning

confidence: 99%

A grid interface current control strategy for DC microgrids

Alshareef

Lin

et al. 2021

Trans. Electr. Mach. Syst.

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His current research interests include control and stability analysis of power electronics converters applied in DC microgrids and distributed power systems, and energy management system design of microgrids.Fei Wang (S'07-M'11-SM'16) received the B.Sc. degree in electrical engineering and the M.Sc. degree in power electronics from Zhejiang University, Hangzhou, China, in 2002 and 2005, respectively, and the Ph.D. degree in power electronics from the

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Impact of Renewable Based Microgrid Supply/Demand Profiles on Low Voltage Distribution Networks

Cited by 13 publications

References 6 publications

An Excessive Tap Operation Evaluation Approach for Unbalanced Distribution Networks With High PV Penetration

An Excessive Tap Operation Evaluation Approach for Unbalanced Distribution Networks With High PV Penetration

Economic Performance of Using Batteries in European Residential Microgrids under the Net-Metering Scheme

A grid interface current control strategy for DC microgrids

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