Abstract
The paper presents results of the studies on overvoltages generated while switching unloaded medium voltage (MV) power cable lines by a vacuum switch. The studies were carried out while switching real MV cable lines and their physical models. It has been found that overvoltages and overcurrents are generated during switching, and that under certain conditions they may reach significant values. These values depend on the source side circuit parameters, on kinematics vacuum switch parameters as well as on parameters of a switched cable line.
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Abbreviations
- AR:
-
Arc reignition
- V p :
-
Test voltages
- t bpn :
-
Time without current between subsequent ARs
- k szn :
-
Coefficient of ground overvoltage in the source side circuit after AR occurrence
- k swn :
-
Coefficient of ground overvoltage in the source side circuit after switching off “n” AR
- k czn :
-
Coefficient of overvoltage in the research circuit after AR occurrence
- k cwn :
-
Coefficient of overvoltage in the research circuit after switching off current of n AR
- k pcn :
-
Coefficient of overvoltage in the research circuit as an effect of overloading the capacity of the cable line or its physical model as a result of AR
References
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Batura, R., Opydo, W. Overvoltages caused by switching unloaded cable lines by a vacuum switch. Electr Eng 87, 181–189 (2005). https://doi.org/10.1007/s00202-004-0238-2
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DOI: https://doi.org/10.1007/s00202-004-0238-2