An Efficient Power Flexibility Aggregation Framework via Coordinate Transformation and Chebyshev Centering Optimization

Shengyi Wang, Bai Cui, Liang Du

Research output: Contribution to conferencePaper

Abstract

The large-scale integration of distributed energy resources (DERs) converts the role of a distribution system from a customer to a prosumer. In this context, the controllable DERs are expected to provide capacity support for the transmission system, which can be considered as power flexibility aggregation. Specifically, it is a process of controlling the power output of DERs to fulfill the desired capacity or flexibility. However, the power output of DERs as control variables is redundant. That is, a power flexibility command can be realized by multiple dispatch alternatives, which may hinder efficient design of control rules and flexibility evaluation schemes. Therefore, this paper introduces a conception of the artificial power flexibility controller to avoid the redundancy issue, which is a converted control variable after reconstructing the DER power region. Through this reconstruction, the DERs can be indirectly controlled by the proposed artificial power flexibility controller. In addition, a Chebyshev centering optimization model is developed to approximate the power flexibility region. At last, the proposed method is verified on an artificially-designed network with multiple DERs.
Original languageAmerican English
Number of pages5
DOIs
StatePublished - 2022
EventIEEE Power and Energy Society General Meeting - Denver, CO
Duration: 17 Jul 202222 Jul 2022

Conference

ConferenceIEEE Power and Energy Society General Meeting
CityDenver, CO
Period17/07/2222/07/22

NREL Publication Number

  • NREL/CP-5D00-85005

Keywords

  • Chebyshev centering optimization
  • power flexibility aggregation

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