1Andreas Voß, 15. Symposium Energieinnovation Graz 2018
Superimposed Impulse VoltageTesting on extruded DC-Cables
according IEC 62895
Andreas Voß, Michael GamlinHaefely Test AG, Basel, Switzerland
2Andreas Voß, 15. Symposium Energieinnovation Graz 2018
Agenda
§ Superimposed Impulse Voltage Test§ Composite Voltage Tests§ Coupling Capacitor vs. Sphere Gap§ Composite Measuring System§ Conclusion
3Andreas Voß, 15. Symposium Energieinnovation Graz 2018
Agenda
§ Superimposed Impulse Voltage Test§ Composite Voltage Tests§ Coupling Capacitor vs. Sphere Gap§ Composite Measuring System§ Conclusion
4Andreas Voß, 15. Symposium Energieinnovation Graz 2018
Superimposed Impulse Voltage Test
§ UP1: DC + opposing LI§ UP2,S: DC + same SI§ UP2,O: DC + opposing SI
§ Cigré recommendations(WG B1.32, TB 496):§ UP1 = 2.1 * UDC
§ UP2,O = 1.2 * UDC
Source: IEC 62895
5Andreas Voß, 15. Symposium Energieinnovation Graz 2018
Agenda
§ Superimposed Impulse Voltage Test§ Composite Voltage Tests§ Coupling Capacitor vs. Sphere Gap§ Composite Measuring System§ Conclusion
6Andreas Voß, 15. Symposium Energieinnovation Graz 2018
Composite Voltage Tests2 Options
UIMP∧ UDC =
7Andreas Voß, 15. Symposium Energieinnovation Graz 2018
Agenda
§ Superimposed Impulse Voltage Test§ Composite Voltage Tests§ Coupling Capacitor vs. Sphere Gap§ Composite Measuring System§ Conclusion
8Andreas Voß, 15. Symposium Energieinnovation Graz 2018
Coupling Capacitor vs. Sphere Gap
§ Sphere Gap:
è Sphere gap is a cheap and easy solution but not a sophisticated one
Sphere Gap Extinction
Sphere Gap Refiring
Sphere Gap ExtinctionCable is completely discharged
Slow DC recharging
9Andreas Voß, 15. Symposium Energieinnovation Graz 2018
Coupling Capacitor vs. Sphere Gap
§ Coupling Capacitor:
è Coupling Capacitor is the technically superiorsolution
After the impulse, the test objectvoltage returns to full DC level
10Andreas Voß, 15. Symposium Energieinnovation Graz 2018
Agenda
§ Superimposed Impulse Voltage Test§ Composite Voltage Tests§ Coupling Capacitor vs. Sphere Gap§ Composite Measuring System§ Conclusion
11Andreas Voß, 15. Symposium Energieinnovation Graz 2018
Composite Measuring System
20 nF
50 MW
1 GW
> 200 nF
UIMP∧ UDC =
12Andreas Voß, 15. Symposium Energieinnovation Graz 2018
Agenda
§ Superimposed Impulse Voltage Test§ Composite Voltage Tests§ Coupling Capacitor vs. Sphere Gap§ Composite Measuring System§ Conclusion
13Andreas Voß, 15. Symposium Energieinnovation Graz 2018
Conclusion
UIMP= ∧UDC
∧CouplingResistor
CouplingCapacitor
Test Object
Universal VoltageDivider
Composite Voltage
Measurement
Impulse VoltageGenerator
14
EuropeHaefely Test AGBirsstrasse 3004052 Basel Switzerland+ 41 61 373 4111+ 41 61 373 [email protected]
ChinaHaefely Test AG Representative Beijing Office
8-1-602, Fortune StreetNo. 67 Chaoyang Road, Chaoyang District
Beijing, China 100025+ 86 10 8578 8099+ 86 10 8578 9908
North AmericaHipotronics, Inc.
1650 Route 22 NBrewster, NY 10509
United States+ 1 845 279 8091+ 1 845 279 2467
HAEFELY HIPOTRONICS has a policy of continuous product improvement. We therefore reserve the right to change design and specification without notice.
OFFICES:
Thank you for your attention!