Improving the Performance of Shunt Active Power Filter by Offering a Solution Based on Time-Domain Integral Filters under Non-ideal Voltage Conditions in Weak Grid

Document Type : Original Article

Authors

Department of Electrical Engineering, Faculty of Electrical Engineering, Arak University of Technology, Arak, Iran

Abstract

The proper and accurate performance of a shunt active power filter depends on the accurate extraction of current harmonics generated by the load. Also, this process requires very good synchronization with network changes. In this paper, a solution for extracting load current harmonics, based on the time-domain-based method, is offered to generate the reference current of a shunt active power filter. This method shows good performance in all grid voltage conditions such as symmetric, symmetric and harmonic, asymmetric, and asymmetric and harmonic. At the same time, the proposed method has very high dynamics and flexibility and low computational load. The performance of the proposed method under grid voltage conditions (symmetric, symmetric and harmonic, asymmetric, and asymmetric and harmonic) was investigated in the Matlab/Simulink environment. To verify the simulation results, several experimental tests were conducted on an active filter built in a laboratory environment, and the results obtained proved the feasibility of using the proposed method industrially with a very good performance. Finally, according to the results obtained in steady-state conditions with optimal dynamic response, the total harmonic distortion of the grid current was significantly reduced from 25.02% to 3.63% for the symmetrical grid, from 24.38% to 4.94% for the symmetrical grid with harmonics, and from 24.53% to 4.77% for the asymmetrical grid with harmonics. These results confirm the optimal and standard performance of the proposed method.

Keywords

Main Subjects

References

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Energy Engineering and Management
Volume 15, Issue 1
June 2025
Pages 50-69

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