Study on the Verification of the Calculated Harmonic Impedance
The verifications of the calculated harmonic impedances are necessary for harmonic impedance estimation. Among the existing methods of the verifications, the method, by matching the calculated background harmonic voltage with the measured voltage when the customer is out of operation, is widely used...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IEEE
2020-01-01
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| Series: | IEEE Access |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/9072105/ |
| _version_ | 1818379618554478592 |
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| author | Fangwei Xu Wei Pu Jinshuai Zhao Zhiquan Ma Wentao Lv |
| author_facet | Fangwei Xu Wei Pu Jinshuai Zhao Zhiquan Ma Wentao Lv |
| author_sort | Fangwei Xu |
| collection | DOAJ |
| description | The verifications of the calculated harmonic impedances are necessary for harmonic impedance estimation. Among the existing methods of the verifications, the method, by matching the calculated background harmonic voltage with the measured voltage when the customer is out of operation, is widely used. The background harmonics can be calculated based on IEC61000-3-6 (named as the IEC method) or the superposition index. However, some researchers ignore the fact that these two methods cannot be chosen arbitrarily, otherwise, the misjudgments may occur. In our study, the nonlinear customers are classified into two categories according to the ways how they are out of operation: 1) only the harmonic source is cut off, and 2) the harmonic source and the impedance of the customer side are both cut off. Then, the differences in using the IEC method and the superposition index to match the calculated and measured background harmonic voltage are investigated. Finally, based on the properties of the two methods and the categories of the customers, a framework is proposed to accurately validate the calculated harmonic impedance. The effectiveness and reliability of the proposed framework are verified through simulation and field case studies. |
| first_indexed | 2024-12-14T02:05:39Z |
| format | Article |
| id | doaj.art-1180843f1a3b4700807db1699e5eace9 |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-14T02:05:39Z |
| publishDate | 2020-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-1180843f1a3b4700807db1699e5eace92022-12-21T23:20:54ZengIEEEIEEE Access2169-35362020-01-018754097541810.1109/ACCESS.2020.29887899072105Study on the Verification of the Calculated Harmonic ImpedanceFangwei Xu0https://orcid.org/0000-0002-8274-346XWei Pu1https://orcid.org/0000-0002-4761-0549Jinshuai Zhao2https://orcid.org/0000-0002-6256-1554Zhiquan Ma3Wentao Lv4https://orcid.org/0000-0002-2648-1733School of Electrical Engineering, Sichuan University, Chengdu, ChinaSchool of Electrical Engineering, Sichuan University, Chengdu, ChinaSchool of Electrical Engineering, Sichuan University, Chengdu, ChinaState Grid Zhejiang Electric Power Research Institute, Hangzhou, ChinaState Grid Zhejiang Electric Power Research Institute, Hangzhou, ChinaThe verifications of the calculated harmonic impedances are necessary for harmonic impedance estimation. Among the existing methods of the verifications, the method, by matching the calculated background harmonic voltage with the measured voltage when the customer is out of operation, is widely used. The background harmonics can be calculated based on IEC61000-3-6 (named as the IEC method) or the superposition index. However, some researchers ignore the fact that these two methods cannot be chosen arbitrarily, otherwise, the misjudgments may occur. In our study, the nonlinear customers are classified into two categories according to the ways how they are out of operation: 1) only the harmonic source is cut off, and 2) the harmonic source and the impedance of the customer side are both cut off. Then, the differences in using the IEC method and the superposition index to match the calculated and measured background harmonic voltage are investigated. Finally, based on the properties of the two methods and the categories of the customers, a framework is proposed to accurately validate the calculated harmonic impedance. The effectiveness and reliability of the proposed framework are verified through simulation and field case studies.https://ieeexplore.ieee.org/document/9072105/Background harmonic voltageharmonic impedanceimpedance verificationIEC61000-3-6superposition index |
| spellingShingle | Fangwei Xu Wei Pu Jinshuai Zhao Zhiquan Ma Wentao Lv Study on the Verification of the Calculated Harmonic Impedance IEEE Access Background harmonic voltage harmonic impedance impedance verification IEC61000-3-6 superposition index |
| title | Study on the Verification of the Calculated Harmonic Impedance |
| title_full | Study on the Verification of the Calculated Harmonic Impedance |
| title_fullStr | Study on the Verification of the Calculated Harmonic Impedance |
| title_full_unstemmed | Study on the Verification of the Calculated Harmonic Impedance |
| title_short | Study on the Verification of the Calculated Harmonic Impedance |
| title_sort | study on the verification of the calculated harmonic impedance |
| topic | Background harmonic voltage harmonic impedance impedance verification IEC61000-3-6 superposition index |
| url | https://ieeexplore.ieee.org/document/9072105/ |
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