Investigation of the Influence of Filter Approximation on the Performance of Reactive Power Compensators in Railway Traction Drive Systems
In reactive power compensators applied in drives with asynchronous motors, a control strategy focusing on the compensation of higher-order current harmonics is implemented. Control schemes of such compensators typically employ low-pass Butterworth filters with fixed cut-off frequencies to isolate th...
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MDPI AG
2025-06-01
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| author | Rolandas Makaras Sergey Goolak Vaidas Lukoševičius |
| author_facet | Rolandas Makaras Sergey Goolak Vaidas Lukoševičius |
| author_sort | Rolandas Makaras |
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| description | In reactive power compensators applied in drives with asynchronous motors, a control strategy focusing on the compensation of higher-order current harmonics is implemented. Control schemes of such compensators typically employ low-pass Butterworth filters with fixed cut-off frequencies to isolate the reactive power component. However, the impact of alternative filter types on compensator performance remains insufficiently explored. Furthermore, in the control systems under consideration, stator phase current signals of the asynchronous motor are used as reference inputs. This approach proves effective under the steady-state operating conditions of the drive. Under non-steady-state operating conditions—typical for traction drive systems—this approach becomes ineffective due to the increased complexity in obtaining accurate reference current signals. As a result, the performance of the filters also deteriorates. It is therefore proposed to investigate the impact of alternative filter types on the efficiency of compensator operation. To address this challenge, the following strategies are suggested: implement higher-order harmonic compensation in the system of stator phase supply voltages of the asynchronous motor; use the control signals from the Field-Oriented Control (FOC) algorithm as reference inputs; and adapt the cut-off frequencies of the filters dynamically to match the frequency of the supply voltage. The simulation results indicate that the use of an elliptic filter in compensator control systems yielded the highest effectiveness. Moreover, the results confirmed the efficiency of the proposed solutions under both steady-state and non-steady-state operating conditions of the traction drive. These approaches support the development of reactive power compensators integrated into traction drive systems for railway rolling stock. |
| format | Article |
| id | doaj-art-725381a367134e0e8155180b21f5f03e |
| institution | Kabale University |
| issn | 2076-3417 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | MDPI AG |
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| series | Applied Sciences |
| spelling | doaj-art-725381a367134e0e8155180b21f5f03e2025-08-20T03:28:24ZengMDPI AGApplied Sciences2076-34172025-06-011513705710.3390/app15137057Investigation of the Influence of Filter Approximation on the Performance of Reactive Power Compensators in Railway Traction Drive SystemsRolandas Makaras0Sergey Goolak1Vaidas Lukoševičius2Department of Transport Engineering, Faculty of Mechanical Engineering and Design, Kaunas University of Technology, Studentų Str. 56, 44249 Kaunas, LithuaniaDepartment of Electromechanics and Rolling Stock of Railways, State University of Infrastructure and Technologies, Kyrylivska Str. 9, 04071 Kyiv, UkraineDepartment of Transport Engineering, Faculty of Mechanical Engineering and Design, Kaunas University of Technology, Studentų Str. 56, 44249 Kaunas, LithuaniaIn reactive power compensators applied in drives with asynchronous motors, a control strategy focusing on the compensation of higher-order current harmonics is implemented. Control schemes of such compensators typically employ low-pass Butterworth filters with fixed cut-off frequencies to isolate the reactive power component. However, the impact of alternative filter types on compensator performance remains insufficiently explored. Furthermore, in the control systems under consideration, stator phase current signals of the asynchronous motor are used as reference inputs. This approach proves effective under the steady-state operating conditions of the drive. Under non-steady-state operating conditions—typical for traction drive systems—this approach becomes ineffective due to the increased complexity in obtaining accurate reference current signals. As a result, the performance of the filters also deteriorates. It is therefore proposed to investigate the impact of alternative filter types on the efficiency of compensator operation. To address this challenge, the following strategies are suggested: implement higher-order harmonic compensation in the system of stator phase supply voltages of the asynchronous motor; use the control signals from the Field-Oriented Control (FOC) algorithm as reference inputs; and adapt the cut-off frequencies of the filters dynamically to match the frequency of the supply voltage. The simulation results indicate that the use of an elliptic filter in compensator control systems yielded the highest effectiveness. Moreover, the results confirmed the efficiency of the proposed solutions under both steady-state and non-steady-state operating conditions of the traction drive. These approaches support the development of reactive power compensators integrated into traction drive systems for railway rolling stock.https://www.mdpi.com/2076-3417/15/13/7057reactive powerhigher harmonics compensationhigh-pass filters |
| spellingShingle | Rolandas Makaras Sergey Goolak Vaidas Lukoševičius Investigation of the Influence of Filter Approximation on the Performance of Reactive Power Compensators in Railway Traction Drive Systems Applied Sciences reactive power higher harmonics compensation high-pass filters |
| title | Investigation of the Influence of Filter Approximation on the Performance of Reactive Power Compensators in Railway Traction Drive Systems |
| title_full | Investigation of the Influence of Filter Approximation on the Performance of Reactive Power Compensators in Railway Traction Drive Systems |
| title_fullStr | Investigation of the Influence of Filter Approximation on the Performance of Reactive Power Compensators in Railway Traction Drive Systems |
| title_full_unstemmed | Investigation of the Influence of Filter Approximation on the Performance of Reactive Power Compensators in Railway Traction Drive Systems |
| title_short | Investigation of the Influence of Filter Approximation on the Performance of Reactive Power Compensators in Railway Traction Drive Systems |
| title_sort | investigation of the influence of filter approximation on the performance of reactive power compensators in railway traction drive systems |
| topic | reactive power higher harmonics compensation high-pass filters |
| url | https://www.mdpi.com/2076-3417/15/13/7057 |
| work_keys_str_mv | AT rolandasmakaras investigationoftheinfluenceoffilterapproximationontheperformanceofreactivepowercompensatorsinrailwaytractiondrivesystems AT sergeygoolak investigationoftheinfluenceoffilterapproximationontheperformanceofreactivepowercompensatorsinrailwaytractiondrivesystems AT vaidaslukosevicius investigationoftheinfluenceoffilterapproximationontheperformanceofreactivepowercompensatorsinrailwaytractiondrivesystems |