Microgrid Power Quality Control and Harmonic Mitigation
Summary
Microgrids are self-contained energy systems that integrate distributed generation, energy storage and varied loads, capable of operating in both grid-connected and islanded modes. The rise of power-electronic interfaces and nonlinear loads introduces challenges in maintaining voltage stability, managing unbalanced currents and suppressing harmonic distortion. Effective power quality control encompasses strategies to regulate voltage magnitude, share real and reactive power among inverters, and mitigate total harmonic distortion (THD) to meet stringent standards. Central to these strategies are advanced control algorithms—ranging from virtual impedance shaping to droop methods and predictive schemes—that adapt in real time to load fluctuations, network impedance variations and resource constraints. Harmonised coordination of distributed generators enhances system resilience, supports high shares of renewable sources and underpins reliable operation in remote or grid-stressed environments.
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Microgrid Power Quality Control and Harmonic Mitigation publication trend
The graph below shows the total number of articles in microgrid power quality control and harmonic mitigation across all publications each year (not limited to Nature Index journals).
Technical terms
Microgrid: A localized grouping of generation sources, storage and loads capable of autonomous or utility-connected operation.
Total Harmonic Distortion (THD): A metric quantifying the aggregate amplitude of harmonic frequency components relative to the fundamental.
Virtual Impedance: A synthetic control parameter imposed on inverter outputs to shape current sharing and filter harmonics.
Harmonic Power Flow (HPF): An extension of traditional power flow analysis that accounts for voltage and current harmonics in network models.
Demand Side Management (DSM): Strategies to adjust consumer load patterns through shedding or shifting to maintain power quality and operational constraints.
References
- Power quality enhancement in islanded microgrids via closed-loop adaptive virtual impedance control. Protection and Control of Modern Power Systems (2023).
- Optimal scheduling of a microgrid with power quality constraints based on demand side management under grid-connected and islanding operations. International Journal of Electrical Power & Energy Systems (2024).
- Decentralized Finite Control Set Model Predictive Control Strategy of Microgrids for Unbalanced and Harmonic Power Management. IEEE Access (2020).
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