Reliability Evaluation of PV Systems with Integrated Battery Energy Storage Systems: DC-Coupled and AC-Coupled Configurations

Sandelić, Monika; Sangwongwanich, Ariya; Blaabjerg, Frede

doi:10.3390/electronics8091059

Cited by 44 publications

(32 citation statements)

References 9 publications

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“…In terms of efficiencies, conversion losses should also be compared in both configurations before commissioning [65]. AC-coupled systems have higher efficiency than DC-coupled systems [67,68] and with the combination of battery storage, they can deliver more supply to the loads [69]. On community locations, AC-coupled systems are relevant configurations for installation because there is no direct PV production [70].…”

Section: Case Study: Wgvmentioning

confidence: 99%

Shared Solar and Battery Storage Configuration Effectiveness for Reducing the Grid Reliance of Apartment Complexes

2020

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More than 2 million houses in Australia have installed solar photovoltaic (PV) systems; however, apartment buildings have adopted a low percentage of solar PV and battery storage installations. Given that grid usage reduction through PV and battery storage is a primary objective in most residential buildings, apartments have not yet fully benefited from installations of such systems. This research presents shared microgrid configurations for three apartment buildings with PV and battery storage and evaluates the reduction in grid electricity usage by analyzing self-sufficiency. The results reveal that the three studied sites at White Gum Valley achieved an overall self-sufficiency of more than 60%. Owing to the infancy of the shared solar and battery storage market for apartment complexes and lack of available data, this study fills the research gap by presenting preliminary quantitative findings from implementation in apartment buildings.

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Section: Case Study: Wgvmentioning

confidence: 99%

Shared Solar and Battery Storage Configuration Effectiveness for Reducing the Grid Reliance of Apartment Complexes

2020

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“…Similarly, the share of the UK's electricity generation from renewable sources reached 35.5% in 2019 [2]. Energy security and system balance issues are likely to arise due to the intermittent nature of many clean energy sources such as wind and solar as they begin to make up a significant part of the energy generation mix [3,4]. Several methods have been used to ensure power system resiliency while allowing high share of renewable energy resources such as demand side management [5], smart grid [6], energy storage [7] and capacity markets (CM) [8].…”

Section: Introductionmentioning

confidence: 99%

Degradation Cost Analysis of Li-Ion Batteries in the Capacity Market with Different Degradation Models

et al. 2020

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Increased deployment of intermittent renewable energy plants raises concerns about energy security and energy affordability. Capacity markets (CMs) have been implemented to provide investment stability to generators and secure energy generation by reducing the number of shortage hours. The research presented in this paper contributes to answering the question of whether batteries can provide cost effective back up services for one year in this market. The analysis uses an equivalent circuit lithium ion battery model coupled with two degradation models (empirical and semi-empirical) to account for capacity fade during battery lifetime. Depending on the battery’s output power, four de-rating factors of 0.5 h, 1 h, 2 h and 4 h are considered to study which de-rating strategy can result in best economic profit. Two scenarios for the number of shortage hours per year in the CM are predicted based on the energy demand data of Great Britain and recent research. Results show that the estimated battery profit is maximum with 2 h and 1 h de-rating factors and minimum with 4 h and 0.5 h. Depending on the battery degradation model used, battery degradation cost can considerably impact the potential profit if the battery’s temperature is not controlled with adequate thermal management system. The empirical and semi-empirical models predict that the degradation cost is minimum at 5 °C and 25 °C respectively. Moreover, both models predict degradation is minimum at lower battery charge levels. While the battery’s capacity fade can be minimized to make some profits from the CM service, the increased shortage hours can make providing this service not economically viable.

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“…Different groups have evaluated the impact of energy storage on overall dependability of energy systems. [5][6][7] These works line out that energy storage is suited for stabilizing energy provision by renewable sources and can improve reliability of the respective energy systems. There are also works regarding reliability of the energy storage technologies themselves; at least for most of the established storage technologies.…”

Section: Introductionmentioning

confidence: 97%

Assessment of the reliability of vanadium‐redox flow batteries

Reichelt

Müller

2020

Engineering Reports

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Redox flow batteries are an interesting energy storage technology because they allow separate scaling of power and capacity. For their utilization on large scale, it is crucial to ensure reliable operation. Failure modes of elements of the system have been evaluated, both, regarding failure rate and severity of the different failures. As the main failure mode directly linked to a specific component of the redox flow technology, degradation of the membrane due to oxidation by vanadium ions has been identified. However, it is demonstrated that reliability is not solely determined by the specific electrochemistry of the technology. A huge share of the overall failure rate is due to mechanical components such as pumps, valves, and sealing. Based on the findings it can be recommended to design the systems with a certain redundancy regarding cells and pumps but avoid excessive redundancy. This is crucial not only because of high CAPEX of redundant systems, but also because of the increased complexity with more valves and connections required for integrating redundant units.

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Reliability Evaluation of PV Systems with Integrated Battery Energy Storage Systems: DC-Coupled and AC-Coupled Configurations

Cited by 44 publications

References 9 publications

Shared Solar and Battery Storage Configuration Effectiveness for Reducing the Grid Reliance of Apartment Complexes

Shared Solar and Battery Storage Configuration Effectiveness for Reducing the Grid Reliance of Apartment Complexes

Degradation Cost Analysis of Li-Ion Batteries in the Capacity Market with Different Degradation Models

Assessment of the reliability of vanadium‐redox flow batteries

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