Flexible and curtailable resource activation in three-phase unbalanced distribution networks

Hashmi, Md Umar; Koirala, Arpan; Ergun, Hakan; Hertem, Dirk Van

doi:10.1016/j.epsr.2022.108608

Cited by 4 publications

(4 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A decentralized method for overvoltage mitigation was proposed in [7], where the droop curve is used to mitigate congestion due to high RES. In [8], the droop curve based on sensitivity is used to activate the flexible resources in the system to mitigate the congestion while still using the centralized OPF for accessing flexibility needs.…”

Section: A Literature Reviewmentioning

confidence: 99%

“…This signal is derived using local measurements at the PCC voltage magnitude and the line loading percentages for the lines connecting a consumer. The design of FAS was first introduced in prior works [8], [12]- [14]. In this work, we focus on calculating FAS with local measurements and statistically quantifying the similarities between the OPF duals denoting the congestion component derived in Section 2.…”

Section: Lmp Congestion Component Estimation With Performance Indicesmentioning

confidence: 99%

“…However, line loading is associated with branches in a DN. Here, we improve on the line loading projection mechanism compared to prior works [8], [12], [13]. Fig.…”

Section: A Models For Fas Calculationmentioning

confidence: 99%

See 2 more Smart Citations

Estimation of congestion component of LMP using only local measurements for flexibility markets

Hashmi

Koirala

Ergun

et al. 2023

2023 19th International Conference on the European Energy Market (EEM)

Self Cite

View full text Add to dashboard Cite

Locational marginal prices (LMP) are the dual variables associated with the power balance constraint of the optimal power flow (OPF) problem. Prior works on LMP calculation and forecasting shows that LMP is composed of generation cost, marginal loss cost and distribution network (DN) congestion cost. The focus of this work is to estimate the congestion component of LMP for radial DNs with only local parameter measurements. The true congestion component of LMP is derived by solving an OPF without penalizing the DN loss or generation cost. The estimated component of the LMP, referred to as the flexibility activation signal (FAS), is derived as a function of the nodal voltage profile at the point of common coupling (PCC) and the line loading of incoming and outgoing branches from PCC. The estimated and true congestion components of LMP for all nodes are analyzed via time series analysis using Granger causality and sensitivity and specificity of estimation output. Numerical case studies provide statistical evidence that voltage times series can be utilized to estimate congestion component of DN OPF. Further, we also show that with local parameter measurements such as line loading and/or voltage measurements can accurately estimate DN congestion incidents with an accuracy exceeding 95%. Although, localized congestion estimation is not entirely accurate, however, such a method is privacy-preserving, desired for autonomous operation without the need for centralized communication. Thus, proposed decentralized FAS estimation is inherently cyber-secure and resilient to external attacks, while mitigating DN congestion.

show abstract

Section: A Literature Reviewmentioning

confidence: 99%

Section: Lmp Congestion Component Estimation With Performance Indicesmentioning

confidence: 99%

See 1 more Smart Citation

Estimation of congestion component of LMP using only local measurements for flexibility markets

Hashmi

Koirala

Ergun

et al. 2023

2023 19th International Conference on the European Energy Market (EEM)

Self Cite

View full text Add to dashboard Cite

show abstract

“…The original cost function to be minimized is defined as: 𝑓 𝑰 𝑖𝑗 , 𝒑 𝑖 𝑢𝑝 , 𝒑 𝑖 𝑑𝑜𝑤𝑛 , 𝒑 𝑜 𝑠𝑢𝑏 = 𝜔 𝑙 𝑙 𝑰 𝑖𝑗 + 𝜔 𝑔 𝑔(𝒑 0 𝑠𝑢𝑏 ) + 𝜔 𝛾 𝛾(𝒑 𝑖 𝑢𝑝 , 𝒑 𝑖 𝑑𝑜𝑤𝑛 ) (11) where function 𝑙 𝑰 𝑖𝑗 denotes the line losses, 𝑔(𝒑 0 𝑠𝑢𝑏 ) is the cost of buying power from the main grid, and 𝛾(𝒑 𝑖 𝑢𝑝 , 𝒑 𝑖 𝑑𝑜𝑤𝑛 ) is the upward and downward flexibility bids. The above multi-objective problem could be solved by the weighted sum method [27]. Also, 𝜔 𝑙 , 𝜔 𝑔 and 𝜔 𝛾 denote the weighting coefficients, which are positive values.…”

Section: B Objective Functionmentioning

confidence: 99%

Flexibility Service Design for Mitigating Voltage Unbalance in the Distribution Network

Fan,

Kockar

2023

2023 IEEE Belgrade PowerTech

View full text Add to dashboard Cite

It is expected that unbalanced voltages will increase in future distribution systems as the level of singlephase distributed energy resources (DERs) rises significantly, and this paper presents a methodology to address such problems. The approach is based on a three-phase optimal power flow (OPF) method seeking to mitigate the voltage unbalance factor (VUF) by using demand-side flexibility provided by DERs. A novel flexibility service proposed here allows Distribution System Operators (DSOs) to mitigate VUF through local flexibility resources. Considering the differences in preferences among DSOs, we compare and analyze three different flexibility service design options to provide a reference for DSOs to develop their strategies. The proposed convex relaxation model was tested using an IEEE network and the results showed that various flexibility service schemes could lead to differences in the allocation of flexibility resources and hence changes in the system state. Furthermore, it was found that the activation of flexibility resources might further increase the unbalance of the system if the voltage unbalance constraint was ignored.

show abstract

Consensus based phase connectivity identification for distribution network with limited observability

Hashmi

Brummund²,

Lundholm

et al. 2023

Sustainable Energy, Grids and Networks

View full text Add to dashboard Cite

Flexible and curtailable resource activation in three-phase unbalanced distribution networks

Cited by 4 publications

References 37 publications

Estimation of congestion component of LMP using only local measurements for flexibility markets

Estimation of congestion component of LMP using only local measurements for flexibility markets

Flexibility Service Design for Mitigating Voltage Unbalance in the Distribution Network

Consensus based phase connectivity identification for distribution network with limited observability

Contact Info

Product

Resources

About