MPC-based Voltage Control with Reactive Power from High-Power Charging Stations for EVs

Klemets, Jonatan Ralf Axel; Torsater, Bendik Nybakk

doi:10.1109/powertech46648.2021.9495042

“…However, reactive power can be controlled without interfering with EV charging [21]. In the previous studies [21] [22], a DSO operational model was proposed for calculating the optimal reactive power Q for minimising voltage deviations. However, in this work, a simpler representation of this active measure can be used instead of an optimization model that assumes information from both the FCS operator and the DSO for the operational planning.…”

Section: A Operational Model For Fcs As An Active Measurementioning

confidence: 99%

“…Since the majority of the lines in the longest lateral of the grid under study have an R/X ratio of less than 5, the maximum reactive injection of FCS converters may be sufficient for voltage improvement. This means that FCSs indirectly contribute to grid support without any signals from DSOs unlike in [21] [22]. In this work, it is assumed that information about expected aggregated charging load profiles and the aggregated FCS converter capability curve is provided to the DSO's investment model.…”

Section: A Operational Model For Fcs As An Active Measurementioning

confidence: 99%

Economic Assessment of Integrating Fast-Charging Stations and Energy Communities in Grid Planning

Rana¹,

Sperstad²,

Torsæter³

et al. 2022

Preprint

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<p>Distribution grid companies and distribution system operators (DSOs) still mostly follow a traditional framework for grid planning. Such frameworks have so far served DSOs well in the economic assessment and cost-benefit analysis of passive measures, such as grid reinforcement. However, the development towards active distribution grids requires DSOs to also be able to assess an extended set of active measures. To this aim, this paper extends and implements a general planning framework for active distribution grids that builds upon the well-proven traditional framework. The methodology integrated in the framework includes: 1) decoupled models for i) operation with active measures and ii) optimal grid investment, and 2) methods for economic assessment considering active measures from both i) a DSO cost-benefit analysis perspective and ii) a willingness-to-pay perspective. In this paper, operational models are integrated for two examples of active measures, namely the use of fast-charging stations (FCS) and local energy communities (LEC). The methodology is demonstrated in a long-term grid planning case study for a realistic Norwegian medium voltage distribution system. For this case, grid planning with FCS as an active measure reduces the present value of grid investment costs by 70% compared with a passive grid planning strategy. The results also demonstrate how the methodology can be used in negotiating the price of active measures between the DSO and distribution system actors such as LEC and FCS operators.</p>

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“…However, reactive power can be controlled without interfering with EV charging [21]. In the previous studies [21] [22], a DSO operational model was proposed for calculating the optimal reactive power Q for minimising voltage deviations. However, in this work, a simpler representation of this active measure can be used instead of an optimization model that assumes information from both the FCS operator and the DSO for the operational planning.…”

Section: A Operational Model For Fcs As An Active Measurementioning

confidence: 99%

“…Since the majority of the lines in the longest lateral of the grid under study have an R/X ratio of less than 5, the maximum reactive injection of FCS converters may be sufficient for voltage improvement. This means that FCSs indirectly contribute to grid support without any signals from DSOs unlike in [21] [22]. In this work, it is assumed that information about expected aggregated charging load profiles and the aggregated FCS converter capability curve is provided to the DSO's investment model.…”

Section: A Operational Model For Fcs As An Active Measurementioning

confidence: 99%

Economic Assessment of Integrating Fast-Charging Stations and Energy Communities in Grid Planning

Rana¹,

Sperstad²,

Torsæter³

et al. 2022

Preprint

0

View full text Add to dashboard Cite

<p>Distribution grid companies and distribution system operators (DSOs) still mostly follow a traditional framework for grid planning. Such frameworks have so far served DSOs well in the economic assessment and cost-benefit analysis of passive measures, such as grid reinforcement. However, the development towards active distribution grids requires DSOs to also be able to assess an extended set of active measures. To this aim, this paper extends and implements a general planning framework for active distribution grids that builds upon the well-proven traditional framework. The methodology integrated in the framework includes: 1) decoupled models for i) operation with active measures and ii) optimal grid investment, and 2) methods for economic assessment considering active measures from both i) a DSO cost-benefit analysis perspective and ii) a willingness-to-pay perspective. In this paper, operational models are integrated for two examples of active measures, namely the use of fast-charging stations (FCS) and local energy communities (LEC). The methodology is demonstrated in a long-term grid planning case study for a realistic Norwegian medium voltage distribution system. For this case, grid planning with FCS as an active measure reduces the present value of grid investment costs by 70% compared with a passive grid planning strategy. The results also demonstrate how the methodology can be used in negotiating the price of active measures between the DSO and distribution system actors such as LEC and FCS operators.</p>

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MPC-based control structure for high-power charging stations capable of providing ancillary services

Klemets,

Haugen,

Torsæter

2024

International Journal of Electrical Power & Energy Systems

1

0

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MPC-based Voltage Control with Reactive Power from High-Power Charging Stations for EVs

Cited by 4 publications

References 22 publications

Economic Assessment of Integrating Fast-Charging Stations and Energy Communities in Grid Planning

Economic Assessment of Integrating Fast-Charging Stations and Energy Communities in Grid Planning

Economic Assessment of Integrating Fast-Charging Stations and Energy Communities in Grid Planning

MPC-based control structure for high-power charging stations capable of providing ancillary services

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