Study on working condition of 750 kV AC filter breaker in ± 1100 kV UHVDC system
| Autor: | Zexin Zhao, Jie Guo, Fang Yu, Xuni Rao, Xiaoke Wu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
power transmission protection
reactors (electric) resistors overvoltage protection HVDC power transmission circuit breakers circuit breaker AC filter groups AC system voltage amplitude Changji-Guquan UHVDC system AC filter breaker PSCAD software reactive power demand harmonic limit inrush currents switching circuit breaker phase selection switch device closing resistance DC transmission power maximum transient recovery voltage parallel opening resistors voltage 750.0 kV Engineering (General). Civil engineering (General) TA1-2040 |
| Zdroj: | The Journal of Engineering (2019) |
| Druh dokumentu: | article |
| ISSN: | 2051-3305 |
| DOI: | 10.1049/joe.2018.8410 |
| Popis: | In this article, the Changji-Guquan ± 1100 kV ultra-high voltage direct current (UHVDC) system has been established by PSCAD software, especially for the arc of the circuit breakers. The AC filter groups and the control strategy have been analysed based on the reactive power demand of this system, AC system voltage amplitude, and harmonic limit. This article mainly studies inrush currents and overvoltage, especially recovery voltage caused by switching circuit breaker of AC filter in the different working conditions. Simulation results show that the currents through circuit breakers are capacitive and contain a variety of harmonics. There will be a high inrush current when a circuit breaker of AC filter is closing, which can be suppressed by phase selection switch device and appropriate closing resistance. A higher DC transmission power and a less short circuit both make the recovery voltage of circuit breakers higher when the AC filters are removed. The maximum transient recovery voltage of circuit breakers of AC filters can be suppressed by adding the parallel opening resistors. In a certain range, higher resistance of opening resistor makes a better suppression effect on recovery voltage. |
| Databáze: | Directory of Open Access Journals |
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