| Autor: |
P.A.A.F. Wouters, Fred Steennis, F. Barakou |
| Rok vydání: |
2019 |
| Předmět: |
|
| Zdroj: |
Proceedings of the Nordic Insulation Symposium. :70-75 |
| ISSN: |
2535-3969 |
| DOI: |
10.5324/nordis.v0i26.3281 |
| Popis: |
Contactless capacitive sensors are applied to monitor(over)voltages near the overhead line terminations of asubstation or at cable to line transitions. The sensor response isthe signal time derivative when loaded with a resistiveimpedance and the waveform is restored by integration. As partof this differentiating/integrating (D/I) measuring concept, theuse of open-air sensors results in excellent EMC characteristicsbut the inherent cross-coupling to other phases has to be dealtwith. Three applications are presented: 1) For a 150 kV cabletermination the partial discharge activity needs to be related tomomentary phase voltages; 2) Measured slow front overvoltageat a 380 kV cable termination from line energizationare compared with predictions from numerical simulation; 3)The perspectives of employing the D/I method for (very) fastfront overvoltages near a 380 kV circuit breaker are examined. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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