Assessment of overvoltage and power losses in low voltage distribution networks with high photovoltaics penetration based on prosumers' self-consumption

Ahmed, Eihab E.E.; Demirci, Alpaslan

doi:10.1109/hora55278.2022.9800001

Cited by 4 publications

(4 citation statements)

References 15 publications

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“…However, higher E PV /E load reduces the SCR below 30%. In Ahmed and Demirci (2022), which examines the technical drawbacks of increasing SCR for low-voltage distribution networks, it is emphasized that SCR below 26% will cause overvoltage problems. Moreover, it is stated that ratios above 55% will cause an increase in power losses.…”

Section: Optimization Resultsmentioning

confidence: 99%

“…It is also said that up to 70% SCR can reduce the maximum voltage peaks by up to 18%. Besides, SCR-induced voltage problems (overvoltage) at the critical busbar in the IEEE 906 low voltage distribution network are shown in Figure 6, (Ahmed and Demirci (2022)). Generally stated, SCR below 30% will increase the technical disadvantages at the distribution busbar.…”

Section: Optimization Resultsmentioning

confidence: 99%

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Optimal Energy Management in Microgrids Considering Supply Demand Rate and Battery Discharge Depth

Terkes,

Demirci

2023

Int. J. Res. Granthaalayah

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Integrating solar energy with battery energy storage systems (BESS) is critical in sustainable development plans and carbon neutrality goals. Can the energy exchange between supply and demand offer hope via effective management of BESS operations? How will the depth of discharge in microgrids affect individual BESS prosumers? Motivated by such questions, this study determines the minimum energy costs and optimal energy management considering the BESS discharge depth for industrial prosumers with different PV power production to electricity demand ratios. In addition, the impact of Epv/Eload and depth of discharge on individual PV-BESS microgrid prosumers is evaluated annually from a technical, economic, and environmental perspective. Moreover, considering the negative impact of the self-consumption rate (SCR) on the low voltage distribution network (overvoltage, power loss, etc.), unfavorable depth of discharge thresholds and Epv /Eload are determined. The optimization framework is built in Python Gurobi, and Mixed Integer Linear Programming solves the complex problem. The results show that a higher Epv /Eload can reduce the cost of energy (COE) by up to 84.1% and increase the renewable fraction (RF) and electricity sales revenues by up to 61% and up to 570.25 $/yr. It also emphasizes that for Prosumer 5, with the highest Epv /Eload (176.5%), each depth of discharge is not feasible due to SCR. In contrast, a higher depth of discharge can increase CO2 reduction by up to 4.45 tons/yr and thus provide additional revenues of up to 197.41 $/yr. Evaluating BESS operations in microgrid energy management will help many stakeholders determine reliable investments and help in the planned transition to clean energy.

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Section: Optimization Resultsmentioning

confidence: 99%

Section: Optimization Resultsmentioning

confidence: 99%

Optimal Energy Management in Microgrids Considering Supply Demand Rate and Battery Discharge Depth

Terkes,

Demirci

2023

Int. J. Res. Granthaalayah

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“…To enhance the sustainability of energy generation and to provide flexibility for the next generation of power system infrastructure, renewable energy resources (Ahmed & Demirci, 2022;Khalid et al, 2016) and energy storage (Denholm & Hand, 2011) are considered the assets in an NG. Renewable energy sources enhance sustainability; however, due to their intermittency and variability, they pose reliability challenges, and thus, a trade-off between sustainability and reliability should be navigated.…”

Section: Research Articlementioning

confidence: 99%

An integrated framework for techno-enviro-economic assessment in nanogrids

El Sayed,

Poyrazoglu,

E. E. Ahmed

2024

Int. J. Renew. Energy Dev.

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This paper presents an integrated framework designed for capacity planning of grid-connected nanogrid, a small solar and energy storage system that can provide kilowatt-level services to individual buildings. This framework comprehensively evaluates nanogrid cost-effectiveness, sustainability, and reliability, employing a multi-faceted techno-enviro-economic assessment approach. Traditional nanogrid capacity planning often prioritizes peak load requirements, which may lack optimality owing to occasional peak load occurrences. Conversely, optimizing solely for base load requirements might also fall short of effectiveness, compromising reliability and sustainability objectives. The proposed framework employs a three-step, integrated process for nanogrid (NG) capacity planning. Firstly, the Planner module identifies optimal asset sizing considering a two-day look-ahead logic. Then, the Operator module serves as a digital twin for the system, conducting hourly calculations over a short-term horizon. Lastly, the Evaluator module evaluates technical, environmental, and economic metrics for each solution, assessing the effectiveness of asset-sizing decisions. A simulated case study has demonstrated the effectiveness of the proposed framework. The technical assessment revealed that a PV size of 24 kW and a storage capacity of 91 kWh led to the most reliable solution, with a probability of local sufficiency of 95 percent. Furthermore, the environmental assessment showcased a renewable fraction of 94% with a PV size of 26 kW and a storage of 85 kWh. Economically, the analysis identified that a PV size of 12 kW and a storage size of 24 kWh led to the minimum total cost. In contrast, a PV size of 26 kW and a storage size of 85 kWh yielded a total operating savings of $4,801.

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“…DC/AC and AC/DC energy conversions are provided by the power conversion system (PCS). The inverter operating power Equation ( 16), rectifier operating power Equation ( 17), and DC/AC inverter ratio Equation ( 18) can be calculated [67].…”

Section: Figure 1 System Modelingmentioning

confidence: 99%

Optimal Sizing and Techno-Economic Evaluation of Microgrids Based on 100% Renewable Energy Powered by Second-Life Battery

Demirci

2023

IEEE Access

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The rapid development of distributed renewable energy has made energy storage essential for demand reliability and flexible energy management. Due to the high investment costs of fresh batteries (FB), achieving a positive and efficient economy takes work. However, second-life batteries (SLB), whose capacity decreases by 20-30% after the first use, can be preferred as alternative energy storage to overcome this challenge. This paper investigates the renewable potential of shared energy storage and the feasibility of FB&SLB for prosumers. In addition, threshold points are determined by examining the financial obligations associated with an increasing share of renewables on the path to 100% renewable energy. Moreover, the impact of carbon taxes on extra CO2 reduction costs is assessed depending on the carbon quota. The results confirm the superiority of SLB, which increases throughput by 11.5% while reducing CO2 by 9.4%. Renewable fractions (RFs) above 59.2%, and 87% in optimal hybrid power systems (HPS), in different climate potentials, and for low, and high energy tariffs lead to costly investments. Increasing the carbon tax could reduce the cost of CO2 reduction by up to 5.2 $/kg in the early stages of carbon limits while avoiding extra costs of up to 2.1 $/kg for FB at lower CO2 limits. In contrast, increasing RF from 95% to 100% would result in an increase in net present cost (NPC) up to 122.65%. It will be more critical than ever for governments to support prosumers' financial trade-offs in the transition to clean energy.INDEX TERMS Carbon emission, carbon tax, energy storage, renewable energy, second-life battery.

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Assessment of overvoltage and power losses in low voltage distribution networks with high photovoltaics penetration based on prosumers' self-consumption

Cited by 4 publications

References 15 publications

Optimal Energy Management in Microgrids Considering Supply Demand Rate and Battery Discharge Depth

Optimal Energy Management in Microgrids Considering Supply Demand Rate and Battery Discharge Depth

An integrated framework for techno-enviro-economic assessment in nanogrids

Optimal Sizing and Techno-Economic Evaluation of Microgrids Based on 100% Renewable Energy Powered by Second-Life Battery

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