Linearized Optimization for Reactive Power Dispatch at Transmission Grid Level considering Discrete Transformer Tap-Settings

Majumdar, Neelotpal; Sarstedt, Marcel; Leveringhaus, Thomas; Hofmann, Lutz

doi:10.1109/appeec50844.2021.9687678

Cited by 1 publication

(2 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The interconnection power flow (IPF) is subject to technical grid constraints and technology constraints of the PQ-flexibilities. Successive linear programming (sLP) method, which is widely used in OPF formulations [22] [23] [24], is selected for solving the problem formulation. The non-linear power flow equations are linearized around the point of operation, around which validity is ensured.…”

Section: Methodology For Determination Of the Feasible Operating Regionmentioning

confidence: 99%

“…This influences the sensitivities for a further accurate estimation of the grid conditions. However, in the scope of this work, this augmentation is not deemed significant discrete tap-changing variables (τ ) are presented as follows [24]: for i ∈ n, and i, t ∈ n t , where n t represents the set of receiving and sending end buses connected with a transformer. σ represents the discrete-tap settings within the integer set of numbers Z.…”

Section: A Linearized Power Flow Equationsmentioning

confidence: 99%

See 1 more Smart Citation

Linear Optimization Based Distribution Grid Flexibility Aggregation Augmented With OLTC Operational Flexibilities

et al. 2022

Self Cite

View full text Add to dashboard Cite

The research project "SiNED -System Services for secure electricity grids in times of advancing energy transition and digital transformation" acknowledges the support of the Lower Saxony Ministry of Science and Culture through the "Niedersächsisches Vorab" grant program (grant ZN3563) and of the Energy Research Centre of Lower Saxony."ABSTRACT Ancillary services e.g., voltage control, congestion management and frequency control, require to be compensated increasingly from the Distributed Energy Resources (DERs). DERs are predominantly wind and photo-voltaic power plants, the major share of which are installed at the distribution grid level. Therefore, the previously passive distribution grids require transformation towards a more active role. Provision of ancillary services from the distribution grid level, requires assessment of active and reactive power flexibility (PQ-flexibility) potentials. Furthermore, increased renewable penetration correlates to increased responsibility of the Distribution System Operators (DSOs) for assessing the flexibility potentials. An aggregation of distribution grid potentials, subject to technical grid constraints and technological power limitations, is termed as Feasible Operating Region (FOR) of the distribution grid. The FOR effectively serves as an interface between the DSOs and the Transmission System Operators (TSO), for flexibility exchanges and planning of ancillary services provision. The determination of the FOR is established in current research, using different algorithms e.g stochastic methods, meta-heuristic programming and mathematical optimization techniques. In this paper, an FOR determination algorithm using successive linear programming (sLP) is proposed and validated against established optimization approaches on a uniform medium voltage (MV) grid model. Comparisons reveal competitiveness with established methods and an added advantage of fast calculation times, suitable for real time assessments. Further enhancement of the FOR is proposed, by integrating discrete transformer tap-changing operational flexibilities using a successive mixed integer linear programming (sMILP). Results demonstrate an increase in the flexibility potential from the distribution grid.

show abstract

Section: Methodology For Determination Of the Feasible Operating Regionmentioning

confidence: 99%

Section: A Linearized Power Flow Equationsmentioning

confidence: 99%

Linear Optimization Based Distribution Grid Flexibility Aggregation Augmented With OLTC Operational Flexibilities

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

Linearized Optimization for Reactive Power Dispatch at Transmission Grid Level considering Discrete Transformer Tap-Settings

Cited by 1 publication

References 12 publications

Linear Optimization Based Distribution Grid Flexibility Aggregation Augmented With OLTC Operational Flexibilities

Linear Optimization Based Distribution Grid Flexibility Aggregation Augmented With OLTC Operational Flexibilities

Contact Info

Product

Resources

About