Scaling Demand-Side Flexibility Through Dynamic Tariffs

2026-06-11

AI Summary

This study addresses the challenges posed by electrification and high renewable energy penetration in Danish distribution networks, which strain system capacity, risk equipment overloading, and compromise voltage stability. To provide a cost-effective flexibility solution, the authors propose an implicit demand-side response mechanism based on dynamic electricity pricing that leverages consumer price sensitivity to achieve peak shaving and valley filling without explicit control. Grounded in empirical consumption data and aligned with the Danish Market Model 3.0 framework, the approach offers scalability, cost efficiency, and revenue neutrality. Results indicate that for a single constrained substation, the method can defer or avoid grid upgrade investments ranging from DKK 13 million to DKK 48 million while simultaneously reducing reliance on peaking generation, connection delays, and outage risks.

Abstract

The ongoing electrification and integration of renewable energy sources in Denmark's distribution grids pose significant operational challenges, including insufficient reserve capacity, component degradation due to overload, voltage instability, and increasing infrastructure investment requirements. This article argues that implicit demand-side flexibility (DSF) incentivized through dynamic tariffs offers the most scalable and cost-effective approach to address these challenges in a modern distribution network. We demonstrate that while explicit flexibility mechanisms provide operational certainty, they cannot scale to address system-wide congestion across heterogeneous customer bases. Drawing on empirical consumption data showing strong price-responsive behavior, varying prices due to, e.g., regulatory frameworks including the Danish Market Model 3.0 and Tariff Model 3.0, and economic analysis, we demonstrate potential grid savings of 13--48 million DKK per constrained substation through deferred or avoided reinforcement. We argue that implicit DSF mechanisms represent the necessary pathway for revenue-neutral scalable flexibility solutions that can defer costly grid reinforcements while maintaining system reliability. Beyond direct grid savings, additional value streams include avoided peak generation costs, reduced connection delays, and lower outage risk, further strengthening the economic case. Critically, dynamic tariffs offer the mechanism through which real-time grid constraints can be communicated to consumers, enabling price signals that accurately reflect the actual state of the capacity of the distribution network at any given point in time and space.

Problem

• demand-side flexibility
• dynamic tariffs
• distribution grid congestion
• renewable energy integration
• grid reinforcement deferral

Innovation

• dynamic tariffs
• demand-side flexibility
• grid reinforcement deferral
• price-responsive consumption
• distribution network constraints