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| Content Provider | IET Digital Library |
|---|---|
| Author | Ma, Jing Xiang, Xiaoqiang Li, Pei Deng, Zhuojun Thorp, James S. |
| Abstract | Traditional distance protection may mal-operate or refuse to operate in the case of non-metallic faults, endangering the safety of power system. Therefore, a new adaptive distance protection scheme based on the impedance complex plane is proposed in this study. First, by utilising the phase relationship between the negative sequence current at the relaying point and the current at the fault point, the fault supplementary impedance angle caused by the fault resistance is calculated. Then, the effective fault impedance from the fault point to the relaying point is obtained by the trigonometric function relationship of the effective fault impedance, measured impedance and fault supplementary impedance on the impedance complex plane. On this basis, the criterion of the adaptive distance protection is constructed. Finally, test results on real-time digital simulator demonstrate that the protection scheme proposed in this study is applicable to various types of faults, and has a good adaptability to different system operating conditions. Compared with traditional distance protection scheme, the proposed scheme is immune to the fault resistance, thus mal-operation or operation-rejection of distance protection caused by the fault resistance could be effectively avoided. |
| Starting Page | 1624 |
| Ending Page | 1633 |
| Page Count | 10 |
| ISSN | 17518687 |
| Volume Number | 11 |
| e-ISSN | 17518695 |
| Issue Number | Issue 7, May (2017) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-gtd/11/7 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2016.0373 |
| Journal | IET Generation, Transmission & Distribution |
| Publisher Date | 2016-12-21 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | A.c. Transmission Adaptive Distance Protection Scheme Extremely High Voltage Fault Point Fault Resistance Fault Supplementary Impedance Angle Fault Tolerance Impedance Complex Maloperate Mathematical Analysis Negative Sequence Current Nonmetallic Fault Operation Rejection Power System Protection Power System Safety Power Transmission Fault Power Transmission Protection Power Transmission Reliability Real Time Digital Simulator Relay Protection Relaying Point Reliability Trigonometric Function Relationship Ultrahigh Voltage Transmission Line |
| Content Type | Text |
| Resource Type | Article |
| Subject | Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering |
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