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Coordinated Microgrid Investment and Planning Process Considering the System Operator
KTH, School of Electrical Engineering (EES), Electric Power and Energy Systems. (PSOC)ORCID iD: 0000-0002-2014-0444
Lawrence Berkeley National Laboratory. (Grid Integration Group)
Lawrence Berkeley National Laboratory. (Grid Integration Group)
Lawrence Berkeley National Laboratory. (Grid Integration Group)
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2017 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 200, p. 132-140Article in journal (Refereed) Published
Abstract [en]

Nowadays, a significant number of distribution systems are facing problems to accommodate more photovoltaic (PV) capacity, namely due to the overvoltages during the daylight periods. This has an impact on the private investments in distributed energy resources (DER), since it occurs exactly when the PV prices are becoming attractive, and the opportunity to an energy transition based on solar technologies is being wasted. In particular, this limitation of the networks is a barrier for larger consumers, such as commercial and public buildings, aiming at investing in PV capacity and start operating as microgrids connected to the MV network. To address this challenge, this paper presents a coordinated approach to the microgrid investment and planning problem, where the system operator and the microgrid owner collaborate to improve the voltage control capabilities of the distribution network, increasing the PV potential. The results prove that this collaboration has the benefit of increasing the value of the microgrid investments while improving the quality of service of the system and it should be considered in the future regulatory framework.

Place, publisher, year, edition, pages
Elsevier, 2017. Vol. 200, p. 132-140
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Electrical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-206827DOI: 10.1016/j.apenergy.2017.05.076Scopus ID: 2-s2.0-85019166054OAI: oai:DiVA.org:kth-206827DiVA, id: diva2:1093962
Funder
SweGRIDS - Swedish Centre for Smart Grids and Energy Storage
Note

QC 20170621

Available from: 2017-05-08 Created: 2017-05-08 Last updated: 2017-11-06Bibliographically approved
In thesis
1. Cost-effective Communication and Control Architectures for Active Low Voltage Grids
Open this publication in new window or tab >>Cost-effective Communication and Control Architectures for Active Low Voltage Grids
2017 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The monitoring and control of low voltage distribution grids has historically been disregarded due to the unidirectional flow of power. However, nowadays the massive integration of distributed energy resources into distribution grids, such as solar photovoltaics, distributed storage, electric vehicles and demand response programs, presents some challenges. For instance, the unidirectional top-down power flow is being replaced by power flows in any direction: top-down and bottom-up. This paradigm shift adds extra regulatory, economic, and technical complexity for the Distribution System Operators (DSO). Thus to overcome the possible operational constraints, thermal limits, or voltage problems in the grid, an update of the existing electricity infrastructures is required. In response to this new situation, this thesis investigates the cost-effective communication and control architectures that are required for active low voltage grid monitoring and control applications, considering the regulatory constraints and the efficient utilization of the assets from a DSO’s perspective. The solutions include: i) optimal sensor placement configuration to perform low voltage state estimation, ii) optimal metering infrastructure designs for active low voltage monitoring applications, iii) coordinated control strategies to allow the integration of microgrid-like structures into the distribution grids, iv) optimal placement of actuators for operating the control strategies, v) a multiagent-based control solution for self-healing and feeder reconfiguration applications, and vi) a framework model and simulations to assess the reliability of the ICT infrastructure that enables the monitoring and control applications. As concluding remark, since the deployment of technology at low voltage grids is restricted to assets owned by the DSO, the operability of the grid is limited. This condition makes it so that the required communication and control enhancement solutions shall prioritize cost-effectiveness over comprehensiveness and complexity. Thus, the results from the presented studies show that it is essential to perform thorough cost-benefit analyses of the potential improvement solutions for each grid, because this will allow deploying the right technology only at the necessary locations.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2017. p. 69
Series
TRITA-EE, ISSN 1653-5146 ; 2017:160
Keywords
Active low voltage distribution grids, CAPEX & OPEX, communication & control architectures, cost-effectiveness, MPC, multiagent systems, photovoltaics, voltage control.
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Electrical Engineering
Identifiers
urn:nbn:se:kth:diva-217271 (URN)978-91-7729-588-4 (ISBN)
Public defence
2017-12-18, Kollegiesal, Brinellvägen 8, KTH-huset, floor 4, KTH Campus, Stockholm, 10:00 (English)
Opponent
Supervisors
Funder
SweGRIDS - Swedish Centre for Smart Grids and Energy Storage
Note

QC 20171106

Available from: 2017-11-06 Created: 2017-11-06 Last updated: 2017-11-28Bibliographically approved

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