Research on Qualification Technology and Qualification System of Safety Grade Optical Fiber Cable in Nuclear Power Plant

Su, Ying; Zhang, Liang; Zhang, Long-Qiang

doi:10.1007/978-981-19-1181-1_37

Cited by 3 publications

(1 citation statement)

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“…When the current load is powered off regularly, the interference current would be a tiny value with a magnitude of 10 -6 , which could be ignored compared with the response current [7]. In an ideal critical situation, the interference current would appear at the initial and ending moments of such a drop phase [8].…”

Section: Emergent Power Off On Interference Currentmentioning

confidence: 99%

Experimental Study on Electromagnetic Interference on control cable from two unbalanced 10 kV Power Cables

Zhao,

Liu,

Chu

et al. 2023

J. Phys.: Conf. Ser.

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The occurrence of unpredicted and sudden failures in power cables seriously threatened the nearby control cables. Two cases of unbalance in the three-phase current load originate from a high horsepower pump and a sudden power off in an MW pump, resulting in an error signal detected in the adjacent control cable. However, these two cases just occurred once during the plant operation; no more history records can be a reference. In this paper, a typical power cable and control cable structure was constructed, typical accidents in power cables were considered, and electromagnetic interference was considered. The results show that the unbalance of the three-phase load results in a fold increase in interference current. Compared with the two-phase unbalance, the one-phase would bring a higher current. In other words, power off in a sudden situation brought a higher current than three-phase unbalance, especially a faster drop in current load. Finally, more attention should be given to the power cable operation, including unbalance in the power cable and an urgent power off.

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Section: Emergent Power Off On Interference Currentmentioning

confidence: 99%