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SecuLEx: a Secure Limit Exchange Market for Dynamic Operating Envelopes

Maurizio Vassallo, Adrien Bolland, Alireza Bahmanyar, Louis Wehenkel, Laurine Duchesne, Dong Liu, Sania Khaskheli, Alexis Ha Thuc, Pedro P. Vergara, Amjad Anvari-Moghaddam, Simon Gerard, Damien Ernst

TL;DR

The paper addresses the challenge of secure, coordinated operation in distribution networks with high DER penetration by introducing SecuLEx, a market-based framework for trading dynamic operating envelopes ($DOEs$). It combines a lexicographic max-min initial DOE allocation with a continuous, pay-as-bid market for exchanging envelope limits, all while enforcing network security through a verification function $VerifyLimits$ and a DC, radial network assumption. The authors formalize the DOE allocation and market-clearing problems, prove tractability in the LV illustrative case, and show that SecuLEx can reduce curtailment and improve social welfare relative to static or centralized approaches. While promising, the work also discusses scalability, extension to AC power flow, allocation-rule alternatives, and regulatory considerations as directions for practical deployment and broader impact.

Abstract

Distributed energy resources (DERs) are transforming power networks, challenging traditional operational methods, and requiring new coordination mechanisms. To address this challenge, this paper introduces SecuLEx (Secure Limit Exchange), a new market-based paradigm to allocate power injection and withdrawal limits that guarantee network security during time periods, called dynamic operating envelopes (DOEs). Under this paradigm, distribution system operators (DSOs) assign initial DOEs to customers. These limits can be exchanged afterward through a market, allowing customers to reallocate them according to their needs while ensuring network operational constraints. We formalize SecuLEx and illustrate DOE allocation and market exchanges on a small-scale low-voltage (LV) network, demonstrating that both procedures are computationally tractable. In this example, SecuLEx reduces renewable curtailment and improves grid utilization and social welfare compared to traditional approaches.

SecuLEx: a Secure Limit Exchange Market for Dynamic Operating Envelopes

TL;DR

The paper addresses the challenge of secure, coordinated operation in distribution networks with high DER penetration by introducing SecuLEx, a market-based framework for trading dynamic operating envelopes (). It combines a lexicographic max-min initial DOE allocation with a continuous, pay-as-bid market for exchanging envelope limits, all while enforcing network security through a verification function and a DC, radial network assumption. The authors formalize the DOE allocation and market-clearing problems, prove tractability in the LV illustrative case, and show that SecuLEx can reduce curtailment and improve social welfare relative to static or centralized approaches. While promising, the work also discusses scalability, extension to AC power flow, allocation-rule alternatives, and regulatory considerations as directions for practical deployment and broader impact.

Abstract

Distributed energy resources (DERs) are transforming power networks, challenging traditional operational methods, and requiring new coordination mechanisms. To address this challenge, this paper introduces SecuLEx (Secure Limit Exchange), a new market-based paradigm to allocate power injection and withdrawal limits that guarantee network security during time periods, called dynamic operating envelopes (DOEs). Under this paradigm, distribution system operators (DSOs) assign initial DOEs to customers. These limits can be exchanged afterward through a market, allowing customers to reallocate them according to their needs while ensuring network operational constraints. We formalize SecuLEx and illustrate DOE allocation and market exchanges on a small-scale low-voltage (LV) network, demonstrating that both procedures are computationally tractable. In this example, SecuLEx reduces renewable curtailment and improves grid utilization and social welfare compared to traditional approaches.

Paper Structure

This paper contains 34 sections, 2 theorems, 22 equations, 2 figures, 3 tables.

Table of Contents

  1. Introduction
  2. Grid operation with envelopes
  3. Network representation
  4. Network constraints
  5. Customers' power usage
  6. DOEs definition
  7. Security verification function
  8. DOEs allocation
  9. SecuLEx market organization
  10. Limit market temporal operation
  11. Orders and order book
  12. Clearing function
  13. Settlement function
  14. Concrete implementation of SecuLEx
  15. Grid operation implementation
  16. ...and 19 more sections

Key Result

Theorem 1

Under Assumptions ass:radial–ass:dc, the branch current $I_{e}$ is a monotone non-decreasing function of consumption $P_c$:

Figures (2)

  • Figure 1: Timeline illustrating the sequence from the initial DOE assignment by the DSO to the closing of the continuous exchange window just before the operating period.
  • Figure 2: Baseline situation where the reverse power flow ($69$kW) exceeds the transformer limit ($60$kW), causing congestion.

Theorems & Definitions (4)

  • Theorem 1: Monotonicity of current
  • proof
  • Theorem 2: Boundary check constraints using monotonicity
  • proof