| 1. |
- Hillberg, Emil, et al.
(författare)
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Flexibility needs in the future power system
- 2019
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Power system flexibility relates to the ability of the power system to manage changes. Solutions providing advances in flexibility are of utmost importance for the future power system. Development and deployment of innovative technologies, communication and monitoring possibilities, as well as increased interaction and information exchange, are enablers to provide holistic flexibility solutions. Furthermore, development of new methods for market design and analysis, as well as methods and procedures related to system planning and operation, will be required to utilise available flexibility to provide most value to society. However, flexibility is not a unified term and is lacking a commonly accepted definition. Several definitions of flexibility have been suggested, some of which restrict the definition of flexibility to relate to changes in supply and demand while others do not put this limitation. The flexibility term is used as an umbrella covering various needs and aspects in the power system. This situation makes it highly complex to discuss flexibility in the power system and craves for differentiation to enhance clarity. In this report, the solution has been to differentiate the flexibility term on needs, and to categorise flexibility needs in four categories: Flexibility for Power: - Need Description: Short term equilibrium between power supply and power demand, a system wide requirement for maintaining the frequency stability. - Main Rationale: Increased amount of intermittent, weather dependent, power supply in the generation mix. - Activation Timescale: Fractions of a second up to an hour. Flexibility for Energy: - Need Description: Medium to long term equilibrium between energy supply and energy demand, a system wide requirement for demand scenarios over time. - Main Rationale: Decreased amount of fuel storage-based energy supply in the generation mix. - Activation Timescale: Hours to several years. Flexibility for Transfer Capacity: - Need Description: Short to medium term ability to transfer power between supply and demand, where local or regional limitations may cause bottlenecks resulting in congestion costs. - Main Rationale: Increased utilisation levels, with increased peak demands and increased peak supply. - Activation Timescale: Minutes to several hours. Flexibility for Voltage: - Need Description: Short term ability to keep the bus voltages within predefined limits, a local and regional requirement. - Main Rationale: Increased amount of distributed power generation in the distribution systems, resulting in bi-directional power flows and increased variance of operating scenarios. - Activation Timescale: Seconds to tens of minutes.Here, flexibility needs are considered from over-all system perspectives (stability, frequency and energy supply) and from more local perspectives (transfer capacities, voltage and power quality). With flexibility support considered for both operation and planning of the power system, it is required in a timescale from fractions of a second (e.g. stability and frequency support) to minutes and hours (e.g. thermal loadings and generation dispatch) to months and years (e.g. planning for seasonal adequacy and planning of new investments).
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| 2. |
- Hillberg, Emil, et al.
(författare)
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Flexibility to support the future power systems
- 2019
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Power system flexibility relates to the ability of the power system to manage changes. Solutions providing advances in flexibility are of utmost importance for the future power system. Development and deployment of innovative technologies, communication and monitoring possibilities, as well as increased interaction and information exchange, are enablers to provide holistic flexibility solutions. Furthermore, development of new methods for market design and analysis, as well as methods and procedures related to system planning and operation, will be required to utilise available flexibility to provide most value to society. However, flexibility is not a unified term and is lacking a commonly accepted definition. The flexibility term is used as an umbrella covering various needs and aspects in the power system. This situation makes it highly complex to discuss flexibility in the power system and craves for differentiation to enhance clarity. In this report, the solution has been to differentiate the flexibility term on needs, and to categorise flexibility needs in four categories: Flexibility for Power, Flexibility for Energy, Flexibility for Transfer Capacity, and Flexibility for Voltage. Here, flexibility needs are considered from over-all system perspectives (stability, frequency and energy supply) and from more local perspectives (transfer capacities, voltage and power quality). With flexibility support considered for both operation and planning of the power system, it is required in a timescale from fractions of a second (e.g. stability and frequency support) to minutes and hours (e.g. thermal loadings and generation dispatch) to months and years (e.g. planning for seasonal adequacy and planning of new investments). The categorisation presented in this report supports an increased understanding of the flexibility needs, to be able to identify and select the most suitable flexibility solutions.
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| 3. |
- Rossi, Joni, et al.
(författare)
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Pathways for the development of future intelligent distribution grids
- 2022
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Ingår i: Energy Policy. - : Elsevier Ltd. - 0301-4215 .- 1873-6777. ; 169
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Tidskriftsartikel (refereegranskat)abstract
- The next decade will bring several technical and organisational challenges to the electrical distribution grids, which are becoming an important pillar of the energy transition. Distribution system operators will play a crucial role and thus need to find innovative solutions that will prepare them for these changes. Acknowledging large differences between European distribution grids, this paper presents pathways for distribution system operators developed within the scope of the UNITED-GRID project, in close cooperation with distribution grids in the Netherlands, France and Sweden. Investment decision tools based on future scenarios and future-readiness assessment form the first step to steer the distribution system operators towards the necessary technical and digital innovations that increase the observability and controllability of the grid. Secondly, new types of business models are introduced that can be integrated into the operators’ portfolios. Thirdly, a workshop methodology is proposed to define the new internal requirements that make distribution system operators more agile to face the fast impacts of the energy transition. Case studies from the demonstration sites in the three countries are used as examples in the paper. © 2022 The Authors
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| 4. |
- Rossi, Joni, et al.
(författare)
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Study of the European Regulatory Framework for Smart Grid Solutions in Future Distribution Systems
- 2020
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Ingår i: CIRED - Open Access Proceedings Journal. - : Institution of Engineering and Technology (IET). - 2515-0855. ; 2020:1, s. 800-802
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Konferensbidrag (refereegranskat)abstract
- Electric distribution systems in Europe are facing significant challenges due to climate change goals, changing market frameworks and technological innovations, which will significantly impact the role of the distribution system operators. The nature and scale of these challenges are strongly driven by the European vision and strategies on climate and energy. This study identifies which policies can become barriers for distribution grid innovation and the implementation of advanced smart grid solutions developed within the UNITED-GRID project. After an extensive review of new policy priority areas within the energy and climate framework and electricity market design, and subsequent discussions with three partner distribution system operators, five priority barriers are identified. The results show that ambitious decarbonisation targets and changing expectations on the distribution system operators’ role in the energy system would require more flexible and efficient network management. However, binding income frameworks, lacking incentives for innovation and regulatory uncertainties hinder modernisation in distribution systems. It can be concluded that these concerns increase the risks for distribution system operators and have to be considered by research projects and developers of smart grid solutions in order to implement and achieve market uptake of the developed solutions within the next 5–10 years.
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| 5. |
- Srivastava, Ankur, 1989, et al.
(författare)
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A DSO Support Framework for Assessment of Future-Readiness of Distribution Systems: Technical, Market, and Policy Perspectives
- 2019
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Ingår i: CIRED Conference Proceedings. - 2032-9644. - 9782960241501
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Konferensbidrag (refereegranskat)abstract
- This paper presents the initial ideas for a framework to support the distribution system operators for assessing current status of network infrastructures, market/business models, and policies applicable to distribution systems, and thus identify future-readiness of their network. The assessment framework consists of two steps as the identification of the key indicators associated with this transition and assessing the current status by evaluation of these indicators based on inputs from distribution system operators. Case studies have been carried out for distribution system operators in three European countries, i.e., Göteborg Energi (Sweden), SOREA (France), and ENEXIS (The Netherlands). The key results have shown that presently the three distribution system operators have a small proportion of renewable power generation in their grids, but it is going to increase in the future. Hence, they need investments in flexibilities, generation and load forecasting, advanced network control, and protection strategies, etc. The results also suggest needs for development of novel business models for customers and changes in the policy and regulations. Finally, a comparative assessment of three distribution system operators is presented in the paper.
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| 6. |
- Valarezo, Orlando, et al.
(författare)
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Survey Results on Local Markets to Enable Societal Value
- 2021
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Ingår i: 2021 IEEE Madrid PowerTech.
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Konferensbidrag (refereegranskat)abstract
- To collate best praxis and ideas on local electricity markets, this paper surveyed a number of pioneering initiatives in local market design and implementation. The survey focused on the definition of the market itself and the roles and responsibilities of actors within, the distribution of the value of local markets, as well as challenges and current barriers. The results indicate that the main value of a local market is related to the benefits for society as a whole and to a lesser extent individual actors. The main benefits are expected to derive from deferred network investments and reduced network costs. Moreover, local markets are expected to allow for higher shares of clean energy integration and generate positive environmental impacts. Nonetheless, a number of regulatory, economic, stakeholder-related, and other barriers risk obstructing the operation of local markets in the short term and inhibit their adoption in the long run.
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