Non-unit protection scheme for flexible DC transmission lines based on fitting the rate of change of line-mode voltage reverse traveling waves
The existing non-unit traveling wave (TW) protection schemes of flexible direct current (DC) transmission lines based on time domain analysis cannot withstand high transition resistance. Thus, this study analyzes the TW propagation characteristics of flexible DC lines and obtains the characteristic...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-03-01
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| Series: | International Journal of Electrical Power & Energy Systems |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0142061524006380 |
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| author | Qixuan Zhang Haifeng Li Hainan Liu Zhijie Wang |
| author_facet | Qixuan Zhang Haifeng Li Hainan Liu Zhijie Wang |
| author_sort | Qixuan Zhang |
| collection | DOAJ |
| description | The existing non-unit traveling wave (TW) protection schemes of flexible direct current (DC) transmission lines based on time domain analysis cannot withstand high transition resistance. Thus, this study analyzes the TW propagation characteristics of flexible DC lines and obtains the characteristic differences in line-mode voltage reverse TW derivatives in the case of internal and external faults. The Levenberg–Marquardt method is used to fit the fault TW; the differences in the waveform features of the reverse TW rate-of-change under internal and external faults are extracted, and the characteristic quantities for internal and external fault identification are constructed by using fitting residuals and dominant term exponents in the fitting results. Finally, a simulation model for flexible DC transmission systems is established via PSCAD, and the effectiveness of the proposed scheme is verified. The results show that this method uses overall waveform characteristics to realize fault detection, is less affected by transition resistance, can withstand up to 800 Ω in transition resistance. Moreover, the influence of TW refraction and reflection on the fitting results is mitigated by means of fitting residuals, allowing for the reliable identification of faults across the entire line. |
| format | Article |
| id | doaj-art-f1a38765f42b4e77b1c27b79478fa540 |
| institution | Kabale University |
| issn | 0142-0615 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | International Journal of Electrical Power & Energy Systems |
| spelling | doaj-art-f1a38765f42b4e77b1c27b79478fa5402025-01-19T06:23:58ZengElsevierInternational Journal of Electrical Power & Energy Systems0142-06152025-03-01164110415Non-unit protection scheme for flexible DC transmission lines based on fitting the rate of change of line-mode voltage reverse traveling wavesQixuan Zhang0Haifeng Li1Hainan Liu2Zhijie Wang3School of Electric Power Engineering, South China University of Technology, 510640, Wushan Road No. 381, Tianhe District, Guangzhou, ChinaCorresponding author.; School of Electric Power Engineering, South China University of Technology, 510640, Wushan Road No. 381, Tianhe District, Guangzhou, ChinaSchool of Electric Power Engineering, South China University of Technology, 510640, Wushan Road No. 381, Tianhe District, Guangzhou, ChinaSchool of Electric Power Engineering, South China University of Technology, 510640, Wushan Road No. 381, Tianhe District, Guangzhou, ChinaThe existing non-unit traveling wave (TW) protection schemes of flexible direct current (DC) transmission lines based on time domain analysis cannot withstand high transition resistance. Thus, this study analyzes the TW propagation characteristics of flexible DC lines and obtains the characteristic differences in line-mode voltage reverse TW derivatives in the case of internal and external faults. The Levenberg–Marquardt method is used to fit the fault TW; the differences in the waveform features of the reverse TW rate-of-change under internal and external faults are extracted, and the characteristic quantities for internal and external fault identification are constructed by using fitting residuals and dominant term exponents in the fitting results. Finally, a simulation model for flexible DC transmission systems is established via PSCAD, and the effectiveness of the proposed scheme is verified. The results show that this method uses overall waveform characteristics to realize fault detection, is less affected by transition resistance, can withstand up to 800 Ω in transition resistance. Moreover, the influence of TW refraction and reflection on the fitting results is mitigated by means of fitting residuals, allowing for the reliable identification of faults across the entire line.http://www.sciencedirect.com/science/article/pii/S0142061524006380Flexible DC transmission lineTransient equivalent circuitFault traveling waveFault detectionWaveform fitting |
| spellingShingle | Qixuan Zhang Haifeng Li Hainan Liu Zhijie Wang Non-unit protection scheme for flexible DC transmission lines based on fitting the rate of change of line-mode voltage reverse traveling waves International Journal of Electrical Power & Energy Systems Flexible DC transmission line Transient equivalent circuit Fault traveling wave Fault detection Waveform fitting |
| title | Non-unit protection scheme for flexible DC transmission lines based on fitting the rate of change of line-mode voltage reverse traveling waves |
| title_full | Non-unit protection scheme for flexible DC transmission lines based on fitting the rate of change of line-mode voltage reverse traveling waves |
| title_fullStr | Non-unit protection scheme for flexible DC transmission lines based on fitting the rate of change of line-mode voltage reverse traveling waves |
| title_full_unstemmed | Non-unit protection scheme for flexible DC transmission lines based on fitting the rate of change of line-mode voltage reverse traveling waves |
| title_short | Non-unit protection scheme for flexible DC transmission lines based on fitting the rate of change of line-mode voltage reverse traveling waves |
| title_sort | non unit protection scheme for flexible dc transmission lines based on fitting the rate of change of line mode voltage reverse traveling waves |
| topic | Flexible DC transmission line Transient equivalent circuit Fault traveling wave Fault detection Waveform fitting |
| url | http://www.sciencedirect.com/science/article/pii/S0142061524006380 |
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