Voltage Control Strategies in Active Distribution Networks

Voltage control in active distribution networks has evolved from simple on‐load tap changer adjustments to sophisticated multi‐layered frameworks that integrate distributed energy resources, smart inverters and demand‐side flexibility. The proliferation of renewable generators, energy storage and prosumer participation has driven the development of local droop controls, decentralised and distributed schemes, hierarchical architectures and fully centralised optimisation platforms. These approaches aim to maintain voltage within statutory limits, minimise network losses and enhance power‐quality security. Coordinated strategies exploit real-time measurements and forecasts to adjust reactive power injections, tap changer positions and network reconfiguration, while local schemes rely on sensitivity metrics to provide rapid, inverter-based voltage support. The interplay between centralised optimisation and edge-level autonomy underpins modern control paradigms, enabling resilience against variability in generation and load. Practical implementations have demonstrated the global significance of advanced voltage control in facilitating high renewables penetration, reducing curtailment and improving operational efficiency in both urban and rural distribution systems.

Research from Nature Portfolio

Recent studies have explored voltage-rise phenomena and mitigation in networks with high renewable penetration. Mathematical models of test feeders incorporating worst-case load and generation scenarios have demonstrated how advanced controllers at the point of common coupling can regulate voltage rise, manage reverse power flows and maintain stability under low demand and peak injection conditions. Simulations suggest that bespoke control algorithms can sustain voltage levels within grid code limits, reduce harmonic distortion and improve power factor even under challenging scenarios with minimal load and maximum generation.

Voltage Control Strategies in Active Distribution Networks publication trend

The graph below shows the total number of articles in voltage control strategies in active distribution networks across all publications each year (not limited to Nature Index journals).

Technical terms

Active distribution network: An electrical network with integrated distributed energy resources and advanced control capabilities.

Reactive power: The component of alternating current that does not transfer net energy but is essential for voltage support and stability.

On-load tap changer: A device on transformers that adjusts voltage ratios under load conditions to regulate network voltage.

Volt–Var optimisation: The process of adjusting voltage and reactive power resources to minimise losses and maintain voltage within prescribed limits.

Point of Common Coupling (PCC): The interface between a distributed generator or prosumer facility and the distribution network.

References

1. Provision of reactive power services by energy communities in MV distribution networks. Sustainable Energy Grids and Networks (2023).
2. Hierarchical and distributed control concept for distribution network congestion management. IET Generation Transmission & Distribution (2017).
3. Voltage Control Methodologies in Active Distribution Networks. Energies (2020).
4. Voltage Control in Smart Grids: An Approach Based on Sensitivity Theory. Journal of Electromagnetic Analysis and Application (2010).
5. Analysis of Voltage and Reactive Power Algorithms in Low Voltage Networks. Energies (2022).
6. Analysis of voltage rise phenomena in electrical power network with high concentration of renewable distributed generations. Scientific Reports (2022).