Presentation 1: Dorian Fourniret (Gérédis)

Title: Voltage Management in Distribution Networks with High RES Penetration

Abstact : Historically, voltage management in distribution networks has relied on a local, static, and deterministic approach, based on downstream flows and rigid sizing assumptions. The massive rise of decentralized production, PV variability, and evolving usage patterns are profoundly transforming this framework: distribution networks are becoming exporters, influencing the transmission grid’s voltage profile, and generating increasing interactions at the primary substation interface. In this context, classic mechanisms like on-load tap changers or grid reinforcement are reaching their technical and economic limits. Coordinating the voltage profile between the Transmission System Operator (TSO) and Distribution System Operators (DSO) is becoming a central challenge. This presentation aims to clarify the specificities of a DSO and formalize current voltage issues, particularly at the transmission–distribution interface.

Presentation 2: Julien Callec (RTE)

Title: Voltage Control on the Transmission Grid – Key Challenges and Principles

Abstract: Voltage is a local parameter that must be constantly controlled at both static and dynamic levels. Indeed, beyond contractual commitments, the technical and even economic implications of poor voltage management are numerous. With the development of distributed generation, changes in load patterns, the undergrounding of power lines, and new market rules, current control mechanisms are being challenged.

Date & Time: Monday March 02, 2026 - 9am to 11am

Location: R7, Building B28, Montefiore Institute

The presentation will be held in french