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Updated: May 20, 2025
06:04
Experimental Investigation of the Hierarchical Control in DC Microgrids Using a Real-time Simulator
Published on: February 14, 2025
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A relative analysis to cascaded fractional-order controllers in microgrid non-minimum phase converters using EHO
N R Anisha Asmy1, J Ramprabhakar1, R Anand1
1Department of Electrical and Electronics Engineering, Amrita School of Engineering, Amrita Vishwa Vidyapeetham, Bengaluru, India.
Scientific Reports
|March 26, 2025
Summary
Cascaded fractional-order controllers (C-FOC) significantly improve microgrid power converter performance. Optimized C-FOCs demonstrate superior transient and steady-state responses compared to traditional PI-PI controllers.
Area of Science:
- Electrical Engineering
- Control Systems
- Renewable Energy Systems
Background:
- Microgrids require reliable and sustainable power management.
- Power electronic converters are crucial for microgrid operation.
- Fractional-order controllers (FOC) offer enhanced dynamic control.
Purpose of the Study:
- To compare the performance of different cascaded fractional-order proportional integral (C-FOPI) controller topologies.
- To evaluate C-FOCs against traditional cascaded proportional integral (PI-PI) controllers in a microgrid boost converter.
- To optimize controller parameters using the Elephant Herd Optimization (EHO) algorithm.
Main Methods:
- Four C-FOPI controller topologies were designed and compared.
- Controllers were optimized using the EHO algorithm with ITAE as the performance metric.
- Performance was evaluated under system parameter variations for a boost converter in a microgrid.
Main Results:
- C-FOCs demonstrated significant improvements in transient and steady-state performance.
- Settling time reduced by 36.6%, overshoot by 15%, and rise time by 20.1%.
- Phase margin improved by over 51%, with a >50% reduction in performance indices compared to PI-PI.
Conclusions:
- Cascaded fractional-order controllers offer superior performance for microgrid power converters.
- Optimized C-FOPI controllers enhance microgrid resilience and efficiency.
- FOCs represent a promising advancement in microgrid control strategies.
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