Requirements for coordinated ancillary services covering different voltage levels

Uebermasser, Stefan; Groiß, Christoph; Einfalt, Alfred; Thie, Nicolas; Vasconcelos, Maria; Helguero, Jorge; Laaksonen, Hannu; Hovila, Petri

doi:10.1049/oap-cired.2017.1033

Cited by 12 publications

(5 citation statements)

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“…Different requirements for the reactive power flow at the TN and DN Point of Interconnection (POI), for the Finnish distribution grid case, and tested at the Sundom Smart Grid, is presented in [11]. This paper considers requirements for (1) European Commission's conditions for reactive power management for the transmission grid-connected distribution systems [12], (2) the conditions set by Fingrid [13] and (3) the Non-Detection Zone (NDZ) requirements for microgrids [14][15][16]. It presents the "future reactive power window"-developed for the Sundom Smart Grid-and a reactive power controller for a 3.6 MW Wind Turbine (WT) unit connected to the MV bus with a full-scale converter that controls reactive power according to the Fingrid and NDZ requirements.…”

Section: Literature Reviewmentioning

confidence: 99%

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Compliance of Distribution System Reactive Flows with Transmission System Requirements

et al. 2021

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Transmission system operators (TSOs) often set requirements to distribution system operators (DSOs) regarding the exchange of reactive power on the interface between the two parts of the system they operate, typically High Voltage and Medium Voltage. The presence of increasing amounts of Distributed Energy Resources (DERs) at the distribution networks complicates the problem, but provides control opportunities in order to keep the exchange within the prescribed limits. Typical DER control methods, such as constant cosϕ or Q/V functions, cannot adequately address these limits, while power electronics interfaced DERs provide to DSOs reactive power control capabilities for complying more effectively with TSO requirements. This paper proposes an optimisation method to provide power set-points to DERs in order to control the hourly reactive power exchanges with the transmission network. The method is tested via simulations using real data from the distribution substation at the Sundom Smart Grid, in Finland, using the operating guidelines imposed by the Finnish TSO. Results show the advantages of the proposed method compared to traditional methods for reactive power compensation from DERs. The application of more advanced Model Predictive Control techniques is further explored.

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Section: Literature Reviewmentioning

confidence: 99%

“…The case study of the Finnish TSO reactive power exchange requirements with the distribution network is taken as a real-life application. Expanding from the works in [11,[14][15][16][17][18][19], this work proposes a novel method with the following features:…”

Section: Contribution and Organisationmentioning

confidence: 99%

Compliance of Distribution System Reactive Flows with Transmission System Requirements

et al. 2021

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“…is RPW requirement and related compensation tariff aim to optimize the reactive power flow from the transmission network's point of view. In addition, reliable and future-proof islanding detection, as well as the possibility of making a stable transition to islanded operation, can be considered simultaneously with the reactive power flow control between HV and MV networks [26,[32][33][34].…”

Section: Sundom Smart Grid (Ssg)mentioning

confidence: 99%

Accelerated Real-Time Simulations for Testing a Reactive Power Flow Controller in Long-Term Case Studies

Sirviö

Mekkanen

Kauhaniemi

et al. 2020

Journal of Electrical and Computer Engineering

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This paper presents the development of an accelerated real-time cosimulation and testing platform, especially for long-term simulations of power systems. The platform is planned to be utilized in the development and testing of active network management functions for microgrids and smart grids. Long-term simulations are needed in order to study, for example, the potential weekly, monthly, or yearly usage of distribution-network-connected distributed energy resources for different technical flexibility services. In order to test new algorithms in long-term study cases, real-time simulations or hardware-in-the-loop tests should be accelerated. This paper analyzes the possibilities and challenges of accelerated long-term simulations in studying the potential use of a large-scale wind turbine for reactive power flow control between distribution system operator (DSO) and transmission system operator (TSO) networks. To this end, the reactive power flow control is studied for different voltage levels (HV and MV) in the Sundom Smart Grid in Vaasa, Finland. The control of reactive power flow between HV and MV networks is realized with a reactive power window control algorithm for a 3.6 MW MV-network-connected wind turbine with a full-scale power converter. The behaviour of the reactive power controller during long-term simulations is studied by offline and real-time simulations. Moreover, the real-time simulations are performed with both software-in-the-loop and controller-hardware-in-the-loop.

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“…Until recently, new grid automation solutions have been installed in SSG to enable more accurate earth-fault detection and localization in compensated mixed (overhead, OH-line & cable) distribution grids. Today SSG serves as Finnish Innovation Cell in a 3-year ERA-Net Smart Grids Plus project called DeCAS (Demonstration of coordinated ancillary services covering different voltage levels and the integration in future markets) [9] which started 2016 (Fig. 3).…”

Section: Sundom Smart Gridmentioning

confidence: 99%

Future-proof islanding detection schemes in Sundom Smart Grid

Laaksonen

Hovila

2017

CIRED - Open Access Proceedings Journal

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Future resilient distribution grids need new, standardbased, agile management and protection architectures which can intelligently utilize flexible, distributed energy resources for local and system-wide technical services. For example, future-proof islanding detection methods can be realized and utilization of flexible energy resources can be maximized by taking into account fault location, power balance situation, prioritization issues and intentional island operation status as part of the islanding detection scheme. In this paper future-proof, grid code compatible islanding detection schemes will be determined for both medium-and low-voltage network connected distributed generation units during both gridconnected and islanded (nested microgrid) operation of Sundom Smart Grid. Also significant issues, like network status dependency, distributed generation unit type, faultride-through capability and fault behavior as well as high-speed wireless 5G communication and routable GOOSE, having impact on future islanding detection schemes will be presented and discussed.

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Requirements for coordinated ancillary services covering different voltage levels

Cited by 12 publications

References 0 publications

Compliance of Distribution System Reactive Flows with Transmission System Requirements

Compliance of Distribution System Reactive Flows with Transmission System Requirements

Accelerated Real-Time Simulations for Testing a Reactive Power Flow Controller in Long-Term Case Studies

Future-proof islanding detection schemes in Sundom Smart Grid

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