Dynamic Voltage Restoration Strategies for Power Quality Improvement
Summary
Dynamic voltage restoration strategies employ power electronic devices—chiefly the dynamic voltage restorer (DVR)—to mitigate voltage sags, swells, harmonics and interruptions in distribution networks. By injecting or absorbing compensating voltages in series with the line, DVRs maintain load voltage within predefined limits despite disturbances arising from faults, switching events or the integration of renewable generators. Recent advances have spurred modular converter topologies, energy-efficient storage integration and sophisticated control frameworks that respond within milliseconds to unbalanced or harmonic-rich conditions. These interventions are vital for protecting sensitive equipment in critical sectors—such as healthcare, data centres and manufacturing—and for supporting low-voltage ride-through capabilities in hybrid wind-PV systems. The convergence of smart grid architectures with real-time condition monitoring has also enabled adaptive strategies that scale with network complexity, improving resilience in both developed and emerging economies. Practical deployments span from urban micro-grids to remote renewable installations, underscoring the global significance of dynamic voltage restoration in safeguarding power quality and enhancing system stability.
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Dynamic Voltage Restoration Strategies for Power Quality Improvement publication trend
The graph below shows the total number of articles in dynamic voltage restoration strategies for power quality improvement across all publications each year (not limited to Nature Index journals).
Technical terms
Dynamic Voltage Restorer (DVR): A series-connected power electronic device that injects voltage to maintain load bus voltage during disturbances.
Voltage sag: A short-duration reduction in RMS voltage magnitude, typically caused by faults or large load switching.
Voltage swell: A transient rise in RMS voltage level lasting longer than half a cycle, often due to load switching or network reconfiguration.
Point of Common Coupling (PCC): The node where a customer’s installation connects to the grid and where power quality metrics are assessed.
Total Harmonic Distortion (THD): A measure of the harmonic content of a waveform, expressed as a percentage of the fundamental component.
References
- Power Quality Improvement and Low Voltage Ride Through Capability in Hybrid Wind-PV Farms Grid-Connected Using Dynamic Voltage Restorer. IEEE Access (2018).
- Dynamic Voltage Restorer (DVR): A Comprehensive Review of Topologies, Power Converters, Control Methods, and Modified Configurations. Energies (2020).
- Solar PV-Fed Multilevel Inverter With Series Compensator for Power Quality Improvement in Grid-Connected Systems. IEEE Access (2022).
- Voltage Quality Enhancement of Low‐Voltage Smart Distribution System Using Robust and Optimized DVR Controllers: Application of the Harris Hawks Algorithm. International Transactions on Electrical Energy Systems (2022).
- Improved Instantaneous Reactive Power (PQ) Theory Based Control of DVR for Compensating Extreme Sag and Swell. IEEE Access (2022).
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