Unpacking the complexity of community microgrids: A review of institutions’ roles for development of microgrids

Warneryd, Martin; Håkansson, Maria; Karltorp, Kersti

doi:10.1016/j.rser.2019.109690

Cited by 125 publications

(88 citation statements)

References 76 publications

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“…This not only validates the viability of the existing PV generation system, but also indicates its sizeable impact on the diversification of the feasible future generation mix for the site. 1 The optimal equipment capacity was determined as multiples of the selected components' nameplate capacities. 2 The optimal PV capacity represents the newly added capacity of the site's PV plant.…”

Section: Feasibility and Optimal Capacity Configurationmentioning

confidence: 99%

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Community Resilience-Oriented Optimal Micro-Grid Capacity Expansion Planning: The Case of Totarabank Eco-Village, New Zealand

2020

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In the grid-tied micro-grid context, energy resilience can be defined as the time period that a local energy system can supply the critical loads during an unplanned upstream grid outage. While the role of renewable-based micro-grids in enhancing communities’ energy resilience is well-appreciated, the academic literature on the techno-economic optimisation of community-scale micro-grids lacks a quantitative decision support analysis concerning the inclusion of a minimum resilience constraint in the optimisation process. Utilising a specifically-developed, time-based resilience capacity characterisation method to quantify the sustainability of micro-grids in the face of different levels of extended grid power outages, this paper facilitates stakeholder decision-making on the trade-off between the whole-life cost of a community micro-grid system and its degree of resilience. Furthermore, this paper focuses on energy infrastructure expansion planning, aiming to analyse the importance of micro-grid reinforcement to meet new sources of electricity demand—particularly, transport electrification—in addition to the business-as-usual demand growth. Using quantitative case study evidence from the Totarabank Subdivision in New Zealand, the paper concludes that at the current feed-in-tariff rate (NZ$0.08/kWh), the life cycle profitability of resilience-oriented community micro-grid capacity reinforcement is guaranteed within a New Zealand context, though constrained by capital requirements.

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Section: Feasibility and Optimal Capacity Configurationmentioning

confidence: 99%

“…The past two decades have witnessed a remarkable evolution of micro-grids (MGs) from a nascent concept to a pivotal player in the transition to 100% renewable energy [1][2][3]. The power industry has accordingly seen an ever-increasing penetration of distributed energy resources into utility grids.…”

Section: Introductionmentioning

confidence: 99%

Community Resilience-Oriented Optimal Micro-Grid Capacity Expansion Planning: The Case of Totarabank Eco-Village, New Zealand

2020

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“…This is why they have gained popularity for resiliency enhancement (Hussain et al, 2018). However, microgrid development is still in a formative phase (Warneryd et al, 2020). Due to their resilient nature, remote microgrids are used in, for example, maritime, military, spaceship, hospital, and campus contexts (Warneryd et al, 2020).…”

Section: Microgridsmentioning

confidence: 99%

“…However, microgrid development is still in a formative phase (Warneryd et al, 2020). Due to their resilient nature, remote microgrids are used in, for example, maritime, military, spaceship, hospital, and campus contexts (Warneryd et al, 2020). According to the literature, one bene t of microgrids is increased reliability in areas where more resilience is needed, because they allow for local site-speci c generation and use of (renewable) energy.…”

Section: Microgridsmentioning

confidence: 99%

Distributed Energy Systems and Energy Communities Under Negotiation

Palm

Kojonsaari

2020

Preprint

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BackgroundNew decentralized energy-generation technologies have turned economies of scale upside down while becoming more economically viable. The increased penetration of information technologies has led to new opportunities to manage infrastructure in a less hierarchical, more flexible way. Together with citizen demands for control over energy, this has put energy communities (ECs) on the agenda, potentially advancing the transition towards more sustainable energy systems, despite hindrances encountered on the way.This paper presents a case from Sweden, using participatory observations and interviews conducted during the planning of a sustainable city district built around sharing. We examined the discussions between stakeholders concerning smart energy systems and the establishment of a microgrid.ResultsWe found that the discussions of the microgrid comprised two parallel discourses, coexisting but seldomly explicitly confronted. The distribution system operator in the area promoted its solutions, while the property developers opted for a microgrid organized more as an EC. We discuss why the EC proponents apparently lost the battle in this smart grid case.ConclusionsThis paper described the energy planning process in a case study in Sweden, where two different models for building an electric microgrid can be identified: distributed energy systems and energy community perspectives. We suggest that these perspectives have different values. We conclude that interest in microgrids could shift the transition pathway towards a more decentralized system involving a variety of owners.

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“…Meanwhile, a microgrid concept which is an independent power grid in tiny scale is becoming more common. In the microgrid, flexible control of power generation and consumption can be achieved well compared to large-scale power grid, and many demonstration tests with locally capturing energy, e.g., solar, wind and biomass, have been performed [5] [6] [7] [8]. Such microgrid might become one of the distributed power sources.…”

Section: Introductionmentioning

confidence: 99%

Stability Enhancement of Small-Scale Power Grid with Renewable Power Sources by Variable Speed Diesel Power Plant*

Takahashi¹,

Umemura²,

Tamura³

2020

JPEE

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This paper proposes a power control method to improve a stability of a small-scale power grid with renewable energy sources. In an isolated smallscale power grid such as an island, diesel power plant is main power source which has an environmental burden and expensive running cost due to high priced fossil fuel. Thus, expanding installation of the renewable energy sources such as a wind power is strongly desirable. Such fluctuating energy sources, however, harm power quality of the small-scale power grid, and in addition, conventional power plant in the small-scale power grid cannot, in general, stabilize the grid system with such fluctuating power sources. In this study, Variable Speed Doubly-Fed Induction Generator (VS-DFIG) is proposed to be installed at a diesel power plant instead of a conventional Fixed Speed Synchronous Generator (FS-SG), because quick control of a power balance in the small-scale power grid can be achieved by using the inertial energy of VS-DFIG. In addition, utilization of a Battery Energy Storage System (BESS) is also considered to assist cooperatively the VS-DFIG control. As a result of the simulation analysis by using the proposed method, it is verified that frequency fluctuations due to renewable energy source can be effectively reduced by quick power control of the VS-DFIG compared to the conventional FS-SG, and further control ability can be obtained by utilizing BESS. Moreover, the transient stability of a small-scale power grid during a grid fault can also be enhanced.

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Unpacking the complexity of community microgrids: A review of institutions’ roles for development of microgrids

Cited by 125 publications

References 76 publications

Community Resilience-Oriented Optimal Micro-Grid Capacity Expansion Planning: The Case of Totarabank Eco-Village, New Zealand

Community Resilience-Oriented Optimal Micro-Grid Capacity Expansion Planning: The Case of Totarabank Eco-Village, New Zealand

Distributed Energy Systems and Energy Communities Under Negotiation

Stability Enhancement of Small-Scale Power Grid with Renewable Power Sources by Variable Speed Diesel Power Plant*

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