Auxiliary Signal-Based Distance Protection in Inverter-Dominated Power Systems

Document Type

Conference Proceeding

Publication Date

1-1-2024

Abstract

Power system protection schemes today rely on currents rising by several orders of magnitude when faults oc-cur. In inverter-dominated power systems, a fault current might be just a few percent larger than normal, making fault detection more difficult. One solution is for the inverter to slightly perturb its output current and/or voltage, i.e., to inject an auxiliary signal, so as to make the system's behavior under faults easier to distinguish from normal. In this paper, we optimize auxiliary signals for fault detection with distance relays. We begin with a standard auxiliary signal design problem for generic static systems. We use duality to reformulate the problem as a bilinear program, which we solve using the convex-concave procedure. We implement the framework in an example based on distance protection, in which the auxiliary signal is negative sequence current.

Identifier

85200609371 (Scopus)

ISBN

[9783907144107]

Publication Title

2024 European Control Conference, ECC 2024

External Full Text Location

https://doi.org/10.23919/ECC64448.2024.10591019

First Page

1974

Last Page

1978

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