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| Content Provider | IET Digital Library |
|---|---|
| Author | Qi, Shixiong Wang, Xiuli Tian, Shijun Wang, Ruogu |
| Abstract | This study mainly focuses on the method of limiting short-circuit current of a power grid by partial transmission switching. The restrictive effect of short-circuit current and the integrality of the power grid should be considered before the choosing the transmission lines. By analysing the relationship between transmission switching and self-impedance of bus with increasing short-circuit current magnitude, a sensitivity matrix can be derived. Based on sensitivity analysis, a set of the least transmission switching is chosen, which can limit short-circuit current to the maximum. This study improves the method of transmission lines selection by sensitivity analysis. The improved sensitivity analysis method directly selects a set of transmission switching lines by the maximum value of weighted sensitivity coefficient instead of selecting lines one by one. It requires less calculation and has a high-computation speed, but there are engineering errors. This work also studies the error influencing the decision of lines selection in different power grid scales. The effectiveness of the improved sensitivity analysis method is verified by several case studies. The cases of different power system scales are utilised for discussing the impact of error on decision of lines selection and for drawing the scope of the improved sensitivity analysis method. |
| Starting Page | 1158 |
| Ending Page | 1163 |
| Page Count | 6 |
| Volume Number | 2019 |
| e-ISSN | 20513305 |
| Issue Number | Issue 16, Mar (2019) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/joe/conferences/cn-adc-2018 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/joe.2018.8522 |
| Journal | The Journal of Engineering |
| Publisher | The Institution of Engineering and Technology |
| Publisher Date | 2018-10-23 |
| Access Restriction | Open |
| Rights License | Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/) |
| Subject Keyword | Algebra Bus Self-impedance Decision Error Discussion Improved Sensitivity Analysis Method Line Selection Matrix Algebra Network And Transmission Line Calculations Optimisation Technique Partial Transmission Switching Power Grid Power Grid Scales Power System Power System Scales Power Transmission Line Sensitivity Analysis Sensitivity Matrix Short-circuit Current Short-circuit Current Magnitude Transmission Line Selection Weighted Sensitivity Coefficient |
| Content Type | Text |
| Resource Type | Article |
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