Power Quality Management in Distribution Networks
Summary
Power quality management in distribution networks encompasses the monitoring, assessment and mitigation of disturbances that compromise the reliability and efficiency of electrical supply. Key issues include voltage sags, swells, flicker, harmonics and unbalanced loads, all of which can result from rapid changes in consumer demand, the proliferation of renewable generators and the integration of non-linear industrial equipment. Modern distribution systems employ advanced power electronic devices—most notably distribution static synchronous compensators (D-STATCOMs) and flexible AC transmission system (FACTS) modules—to inject or absorb reactive power and to filter undesired frequency components. Real-time digital controllers, aided by adaptive algorithms and artificial intelligence, enable dynamic compensation for transient events and continuous regulation of voltage and current waveforms. The rise of smart grids and two-way communication has facilitated decentralised control schemes, allowing network operators to coordinate distributed resources for harmonisation, power-factor correction and voltage support. Globally, these approaches underpin resilient microgrids, facilitate higher penetrations of wind and solar generation, and ensure compliance with international standards for total harmonic distortion and voltage stability.
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Power Quality Management in Distribution Networks publication trend
The graph below shows the total number of articles in power quality management in distribution networks across all publications each year (not limited to Nature Index journals).
Technical terms
D-STATCOM: A power electronic device that injects or absorbs reactive power to regulate voltage and suppress harmonics in distribution networks.
Total Harmonic Distortion (THD): A metric expressing the ratio of the sum of powers of all harmonic components to the power of the fundamental frequency, used to quantify waveform distortion.
Reactive Power: The component of alternating current that does not transfer net energy but supports voltage levels and the magnetic fields in inductive loads.
Droop Control: A decentralised method for sharing real and reactive power among parallel sources by intentionally varying voltage or frequency setpoints in proportion to power output.
FACTS Device: Flexible AC transmission system equipment that uses power electronics to enhance controllability and increase power transfer capability of the network.
References
- Comprehensive Review of Distributed FACTS Control Algorithms for Power Quality Enhancement in Utility Grid With Renewable Energy Penetration. IEEE Access (2020).
- Control of DSTATCOM Using ANN-BP Algorithm for the Grid Connected Wind Energy System. Energies (2022).
- Droop Controlled Microgrid With DSTATCOM for Reactive Power Compensation and Power Quality Improvement. IEEE Access (2022).
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