scholarly journals An analysis of photovoltaic/supercapacitor energy system for improving self-consumption and self-sufficiency

2022 ◽  
Vol 8 ◽  
pp. 680-695
Author(s):  
Qusay Hassan ◽  
Marek Jaszczur ◽  
Ammar M. Abdulateef ◽  
Jasim Abdulateef ◽  
Ali Hasan ◽  
...  
2019 ◽  
Vol 110 ◽  
pp. 02030
Author(s):  
Olga Kalchenko ◽  
Svetlana Evseeva ◽  
Oksana Evseeva ◽  
Kristina Plis

The pathway to a low-carbon future is circular. Circular economy and the optimization of resources used in the energy system can be seen as a way to improve energy self-sufficiency. In St. Petersburg, stakeholders of International Innovation Forum and International Economic Forum 2018 have discussed foreign experience and circular economy in Russia, and found several solutions. Representatives from Business Finland partnership shared their experience – how environmentally friendly technologies become profitable business. FIRO-O, OptiKom, Charity second-hand store “Spasibo”, Baltika Brewery (Carlsberg group) and St. Petersburg Urban Eco-Cluster are given as successful examples of circular economy principles in Russia and St. Petersburg. Moscow and Saint Petersburg have different programs under the local authorities’ support in the sphere of environmentally-friendly development. Infrastructure of the Russian regions needs more attention and support from all the stakeholders: the business, the government and the society. The triangle cooperation (business-government-society) is needed. Russian company’s cooperation and integration into the global networks of ecologically responsible businesses could lead to the easier and faster solutions.


Energies ◽  
2019 ◽  
Vol 12 (17) ◽  
pp. 3389 ◽  
Author(s):  
Sergio Bruno ◽  
Maria Dicorato ◽  
Massimo La Scala ◽  
Roberto Sbrizzai ◽  
Pio Alessandro Lombardi ◽  
...  

In this this paper, the optimal sizing of electric and thermal storage is applied to the novel definition of a net zero multi energy system (NZEMS). A NZMES is based on producing electricity exclusively from renewable energy sources (RES) and converting it into other energy forms to satisfy multiple energy needs of a community. Due to the intermittent nature of RES, storage resources are needed to increase the self-sufficiency of the system. Possible storage sizing choices are examined considering, on an annual basis, the solution of a predictive control problem aimed at optimizing daily operation. For each day of the year, a predictive control problem is formulated and solved, aimed at minimizing operating costs. Electric, thermal, and (electric) transportation daily curves and expected RES production are assessed by means of a model that includes environmental parameters. Test results, based on the energy model of a small rural village, show expected technical-economic performance of different planning solutions, highlighting how the renewable energy mix influences the choice of both thermal and electric storage, and how self-sufficiency can affect the overall cost of energy.


Author(s):  
Maria Cândida Arrais de Miranda Mousinho ◽  
Ednildo Andrade Torres ◽  
Silvio Alexandre Beisl Vieira de Melo ◽  
Nanda Kumar

The act of dominating energy resources undoubtedly permeates the conquest of territories and their respective societies. Energy and geopolitics have always walked conjointly in the process of economic and social development in which societies have been based over the time. The multiplicity of issues that geopolitics gathered helped broaden the spectrum of analysis of geopolitical turning it more complex. This paper has the main objective to contribute for a discussion about the transition from the geopolitics based on the physical space to the geopolitics based on sustainability in which renewable energy has consolidated in the international scenario.  The final considerations highlight the quest for energy security requires more than the quest for energy self-sufficiency itself. In addition, the sustainable paradigm introduced in the geopolitics of energy new challenges as the insertion of renewable energy in a context dominated by traditional sources of energy that provokes a reflection on how the challenges related to geopolitics will be dealt with. In that way, China and India appears as a global players. The choice of cooperative dialogues appears as an essential element in the balance of the energy system.


Energies ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4695
Author(s):  
Charlotte Senkpiel ◽  
Wolfgang Hauser

This paper analyses the effects of regional renewable electricity self-sufficiency targets on the power system in Germany. For this purpose, an interdisciplinary approach from social sciences and energy system modelling was chosen, which allows considering qualitative factors such as public acceptance or political stability. Following the concept of context scenarios, consistent raw scenarios are generated by a cross-impact balance analysis (CIB), and the scenarios are quantified by the unit commitment and expansion cost minimisation model ENTIGRIS considering power plants, storages, and the electricity grid. This approach enables an understanding of the system framework conditions and their relationships and allows the combination of qualitative and quantitative scenario descriptors. The most important factors for setting regional self-sufficiency targets were identified through interviews. The main system effects identified are: The regional distribution of generation capacities is strongly influenced by a more demand-oriented installation of generation capacities. This leads to less grid reinforcement, but higher rates of curtailment. In all scenarios, higher utilization of the PV roof potential instead of ground mounted could be observed. The total system costs are increasing only slightly with regional self-supply targets. In general, it was found that the influence of regional self-sufficiency targets is less pronounced in scenarios that already achieve high national RES shares than in scenarios that achieve lower shares, since technology, storage and grid expansion measures are necessary anyway to achieve high RES shares. Overall, the effects here are rather small and the regional objective is not associated with major disadvantages for the system. In a future characterised by stagnation, the system can benefit from regional targeting, as higher renewable shares and lower costs can result. The main conclusion therefore is that regional target setting seem to be beneficial for the overall power system, in terms of system cost, national RE share, acceptance and CO2-emissions.


Energy Policy ◽  
2016 ◽  
Vol 98 ◽  
pp. 365-377 ◽  
Author(s):  
Maximilian Engelken ◽  
Benedikt Römer ◽  
Marcus Drescher ◽  
Isabell Welpe

Energies ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5997
Author(s):  
Mircea Stefan Simoiu ◽  
Ioana Fagarasan ◽  
Stephane Ploix ◽  
Vasile Calofir

Future renewable energy communities will reshape the paradigm in which we design and control efficient power systems at the district level. In this manner, the focus will be fundamentally shifted towards sustainable related concepts such as self-consumption, self-sufficiency and net energy exchanged with the grid. In this context, the paper presents a novel approach for optimally designing and controlling the photovoltaic plant and energy storage systems for a metro station in order to increase collective self-consumption and self-sufficiency at the district level. The methodology considers a community of several households connected to a subway station and focuses on the interaction between energy sources and consumers. Furthermore, the optimal solution is determined by using a Mixed Integer Linear Programming Approach, and the impact of different configurations on the overall district benefit is investigated by using several simulation scenarios. The work presents a detailed case study to underline the benefits and flexibility offered by the energy storage system in comparison with a scenario involving only a photovoltaic plant.


Author(s):  
Florijn de Graaf ◽  
Simon Goddek

AbstractWith the pressure to transition towards a fully renewable energy system increasing, a new type of power system architecture is emerging: the microgrid. A microgrid integrates a multitude of decentralised renewable energy technologies using smart energy management systems, in order to efficiently balance the local production and consumption of renewable energy, resulting in a high degree of flexibility and resilience. Generally, the performance of a microgrid increases with the number of technologies present, although it remains difficult to create a fully autonomous microgrid within economic reason (de Graaf F, New strategies for smart integrated decentralised energy systems, 2018). In order to improve the self-sufficiency and flexibility of these microgrids, this research proposes integrating a neighbourhood microgrid with an urban agriculture facility that houses a decoupled multi-loop aquaponics facility. This new concept is called Smarthood, where all Food–Water–Energy flows are circularly connected. In doing so, the performance of the microgrid greatly improves, due to the high flexibility present within the thermal mass, pumps and lighting systems. As a result, it is possible to achieve 95.38% power and 100% heat self-sufficiency. This result is promising, as it could pave the way towards realising these fully circular, decentralised Food–Water–Energy systems.


Energies ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4515
Author(s):  
Claude Ziad El-Bayeh ◽  
Mohamed Zellagui ◽  
Navid Shirzadi ◽  
Ursula Eicker

This paper proposes an original multi-criteria decision-making optimization algorithm to select the best solar panels in an existing market and optimally size the photovoltaic (PV) system for an electric vehicle parking lot (EVPL). Our proposed algorithm is called rank-weigh-rank (RWR), and it is compared to the well-known technique for order of preference by similarity to ideal solution (TOPSIS) optimization algorithm under the same conditions for validation purposes. Results show that the speed of our proposed algorithm (RWR) in finding the best solution increases exponentially compared to TOPSIS when the numbers of alternatives and criteria increase. Moreover, 77% is the probability of obtaining results with more than 80% accuracy compared to TOPSIS, which validates the efficiency of our algorithm. In addition, we were able to design an EVPL with a power self-sufficiency ratio of 60.8%, the energy self-sufficiency ratio of 74.7%, and a payback period of 10.58 years. Moreover, the renewable energy-based EVPL was able to reduce the power losses on the network by 95.7% compared to an EVPL without a renewable energy system and improve the voltage deviation.


Energies ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6874
Author(s):  
Georg Göhler ◽  
Anna-Lena Klingler ◽  
Florian Klausmann ◽  
Dieter Spath

Intelligent integration of decentralised energy resources, local storage and direct consumption are key factors in achieving the transformation of the energy system. In this study, we present a modular simulation concept that allows the planning of decentralised energy systems for buildings and building blocks. In comparison to related studies, we use a simulation model for energy planning with a high time-resolution from the perspective of the energy system planner. In this study, we address the challenges of the grid connection in combination with an increasing number of electric vehicles (EV) in the future. The here developed model is applied for an innovative building block in Germany with a photovoltaic (PV) system, a combined heat and power (CHP) unit, battery storage and electric vehicles. The results of the simulation are validated with real-life data to illustrate the practical relevance and show that our simulation model is able to support the planning of decentralised energy systems. We demonstrate that without anticipating future electric vehicle charging, the system configurations could be sub-optimal if complete self-sufficiency is the objective: in our case study, the rate of self-sufficiency of the net-zero energy building will be lowered from 100% to 91% if considering electric vehicles. Furthermore, our simulation shows that a peak minimising operation strategy with a battery can prevent grid overloads caused by EV charging in the future. Simulating different battery operation strategies can further help to implement the most useful strategy, without interruption of the current operation.


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