A Novel Variable-Step Algorithm for DC-Side Voltage Stability Control Strategy in UPQC to Improve Power Quality
With the development of semiconductor technology, the increasing number of power electronic converters and nonlinear loads has further exacerbated power-quality issues in the grid. To address this, this paper presents an improved DC-side voltage control strategy for UPQC, aiming to enhance power qua...
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| Format: | Article |
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MDPI AG
2025-02-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/15/5/2513 |
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| author | Kai Song Ningning Li Cong Li Zihui Lian Hongxu Li Jiawen Sun Shulin Jiang Boyan Huang |
| author_facet | Kai Song Ningning Li Cong Li Zihui Lian Hongxu Li Jiawen Sun Shulin Jiang Boyan Huang |
| author_sort | Kai Song |
| collection | DOAJ |
| description | With the development of semiconductor technology, the increasing number of power electronic converters and nonlinear loads has further exacerbated power-quality issues in the grid. To address this, this paper presents an improved DC-side voltage control strategy for UPQC, aiming to enhance power quality under complex conditions. First, an adaptive filter is integrated into the linear active disturbance rejection control (LADRC) to address control accuracy issues caused by noise and parameter variations. To solve the voltage sag problem resulting from the filter, the effects of fixed-step and various variable-step algorithms within the filter are analyzed, and the optimal control strategy is identified. Simulation results demonstrate that the proposed arctangent function-based variable step-size algorithm (VAV-LADRC) strategy effectively improves the UPQC system’s performance in mitigating voltage sags, swells, and harmonics under dynamic load changes, enhancing the stability of the DC-side voltage. To further validate the generalizability of the method, a co-simulation of a photovoltaic power-generation system with the UPQC is conducted, simulating variations in solar irradiance. The results show that the proposed method maintains excellent control performance under complex conditions, providing a better practical solution for the efficient use of green energy. |
| format | Article |
| id | doaj-art-0d052dd6fe2b48e9abfeb765c0b709ad |
| institution | DOAJ |
| issn | 2076-3417 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj-art-0d052dd6fe2b48e9abfeb765c0b709ad2025-08-20T02:57:41ZengMDPI AGApplied Sciences2076-34172025-02-01155251310.3390/app15052513A Novel Variable-Step Algorithm for DC-Side Voltage Stability Control Strategy in UPQC to Improve Power QualityKai Song0Ningning Li1Cong Li2Zihui Lian3Hongxu Li4Jiawen Sun5Shulin Jiang6Boyan Huang7College of Electrical Engineering and Information, Northeast Agricultural University, Harbin 150030, ChinaCollege of Electrical Engineering and Information, Northeast Agricultural University, Harbin 150030, ChinaCollege of Electrical Engineering and Information, Northeast Agricultural University, Harbin 150030, ChinaCollege of Electrical Engineering and Information, Northeast Agricultural University, Harbin 150030, ChinaCollege of Electrical Engineering and Information, Northeast Agricultural University, Harbin 150030, ChinaCollege of Electrical Engineering and Information, Northeast Agricultural University, Harbin 150030, ChinaCollege of Electrical Engineering and Information, Northeast Agricultural University, Harbin 150030, ChinaCollege of Electrical Engineering and Information, Northeast Agricultural University, Harbin 150030, ChinaWith the development of semiconductor technology, the increasing number of power electronic converters and nonlinear loads has further exacerbated power-quality issues in the grid. To address this, this paper presents an improved DC-side voltage control strategy for UPQC, aiming to enhance power quality under complex conditions. First, an adaptive filter is integrated into the linear active disturbance rejection control (LADRC) to address control accuracy issues caused by noise and parameter variations. To solve the voltage sag problem resulting from the filter, the effects of fixed-step and various variable-step algorithms within the filter are analyzed, and the optimal control strategy is identified. Simulation results demonstrate that the proposed arctangent function-based variable step-size algorithm (VAV-LADRC) strategy effectively improves the UPQC system’s performance in mitigating voltage sags, swells, and harmonics under dynamic load changes, enhancing the stability of the DC-side voltage. To further validate the generalizability of the method, a co-simulation of a photovoltaic power-generation system with the UPQC is conducted, simulating variations in solar irradiance. The results show that the proposed method maintains excellent control performance under complex conditions, providing a better practical solution for the efficient use of green energy.https://www.mdpi.com/2076-3417/15/5/2513unified power quality conditionervoltage controlharmonic suppressionadaptive filterphotovoltaic power generation |
| spellingShingle | Kai Song Ningning Li Cong Li Zihui Lian Hongxu Li Jiawen Sun Shulin Jiang Boyan Huang A Novel Variable-Step Algorithm for DC-Side Voltage Stability Control Strategy in UPQC to Improve Power Quality Applied Sciences unified power quality conditioner voltage control harmonic suppression adaptive filter photovoltaic power generation |
| title | A Novel Variable-Step Algorithm for DC-Side Voltage Stability Control Strategy in UPQC to Improve Power Quality |
| title_full | A Novel Variable-Step Algorithm for DC-Side Voltage Stability Control Strategy in UPQC to Improve Power Quality |
| title_fullStr | A Novel Variable-Step Algorithm for DC-Side Voltage Stability Control Strategy in UPQC to Improve Power Quality |
| title_full_unstemmed | A Novel Variable-Step Algorithm for DC-Side Voltage Stability Control Strategy in UPQC to Improve Power Quality |
| title_short | A Novel Variable-Step Algorithm for DC-Side Voltage Stability Control Strategy in UPQC to Improve Power Quality |
| title_sort | novel variable step algorithm for dc side voltage stability control strategy in upqc to improve power quality |
| topic | unified power quality conditioner voltage control harmonic suppression adaptive filter photovoltaic power generation |
| url | https://www.mdpi.com/2076-3417/15/5/2513 |
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