Coordinated Microgrid Frequency Regulation Based on DFIG Variable Coefficient Using Virtual Inertia and Primary Frequency Control
Top Cited Papers
- 22 March 2016
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Energy Conversion
- Vol. 31 (3), 833-845
- https://doi.org/10.1109/tec.2016.2537539
Abstract
This paper proposes a variable coefficient combined virtual inertia and primary frequency control strategy for doubly fed induction generators (DFIG) in coordination with diesel generator to participate in wind/photovoltaic/diesel microgrid frequency regulation. The frequency response characteristic is analyzed under different wind speeds with corresponding inertia control parameters different. A 10% wind power margin is preserved through overspeed control and pitch angle control to offset the decrease of wind output power after temporary extra power surge, and provide a permanent frequency support for microgrids. The influence of droop control gain setting is also illustrated under different wind velocities. By continuously adjusting the control parameters according to wind speed variation, a variable coefficient method is realized. The method can guarantee an efficient implementation of this strategy in time-varying conditions. Finally, this coordinated control strategy is tested in a storage-independent microgrid with solar, wind, and diesel generators.Keywords
Funding Information
- National Natural Science Foundation of China (51207087)
- Electrical Engineering
- Shanghai Plateau Discipline
- Shanghai Green Energy Grid Connected Technology Engineering Research Center (13DZ2251900)
- Center for Ultra-Wide-Area Resilient Electric Energy Transmission Networks
- National Science Foundation (EEC-1041877)
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