Fundamental tests for 550 kV SF&lt;inf&gt;6&lt;/inf&gt; synchronous circuit breaker

Guan, Yong Liang; Liu, Weidong; Xu, Guo; Zheng, Xin; Du, Ning; Wu, Junhui; Yin, Jun; Zhang, Hua; Zhang, Yiming

doi:10.1109/icma.2009.5246755

Cited by 2 publications

(3 citation statements)

References 4 publications

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“…A large amount series tests have been executed with the 550 kV SF 6 circuit breaker mentioned in this paper, and the results showed that the deviation of its operation time under any certain condition is less than ± 1 ms, and the changing principles of the operation time with operation voltage, hydraulic oil pressure and environment temperature have been obtained, which can be applied and compensated in the controlling strategy [12].…”

Section: A Deviation Ofthe Closing Time Ofthe Circuit Breakermentioning

confidence: 94%

“…overvoltage. The 550 kV SF 6 circuit breaker mentioned in this paper has the RDDS as 83.34 kV/ms which is high enough for synchronously closing [12].…”

Section: Basic Controlling S Trat Egymentioning

confidence: 95%

“…The 550 kV SF 6 circuit breaker has a stable enough closing time, whose deviation is less than ± 1 ms under any certain situation [12]. This characteristic makes the circuit breaker suitable for synchronously closing parallel capacitor.…”

Section: Introductionmentioning

confidence: 98%

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Controlling strategy and implementation for synchronously closing 550 kV parallel capacitor

Guan

Liu

et al. 2009

2009 International Conference on Mechatronics and Automation

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Synchronously closing can avoid surge current and overvoltage on the parallel capacitor. There will be more meaningful to 550 kV than lower voltage capacitor because the insulation requirements are relatively higher in 550 kV situations. Circuit breaker's synchronous operation and Synchronously Controlling Controller (SCC) can be a key part to the modern substation intellectualization and automation system in the future. The controlling strategy for synchronously closing 550 kV parallel capacitor has been discussed in-depth in this paper. The main influence factors, such as Rate of Decrease Dielectric Strength (RDDS), deviation of closing time of the circuit breaker, and residual voltage on the capacitor, have been considered. The optimized mechanical contact point for synchronously closing has been obtained. Based on embedded technology, a SCC for synchronously closing 550 kV parallel capacitor and fitting IEC 61850 standard has been developed and has passed the 4th rigorous level EMC test. The test results indicate that the SCC has enough accuracy, calculation and reaction speed, and reliability for real application.

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Section: A Deviation Ofthe Closing Time Ofthe Circuit Breakermentioning

confidence: 94%

“…overvoltage. The 550 kV SF 6 circuit breaker mentioned in this paper has the RDDS as 83.34 kV/ms which is high enough for synchronously closing [12].…”

Section: Basic Controlling S Trat Egymentioning

confidence: 95%