Impulse testing of hybrid gas-solid polymer insulation systems
Paper i proceeding, 2013

Existing methods of impulse testing of high-voltage insulation are examined and their applicability to a hybrid gas-solid system is analysed. The experiments were conducted with spherical electrodes of different radii immersed in air and separated by a polymeric barrier. The obtained results are discussed in terms of test voltage patterns (withstand/flashover sequences) obtained with different test methods including standard and modified procedures. It is shown that presence of gas-solid interfaces in the considered system, which may be charged during testing with unipolar impulse voltages, makes correct determination of low probability flashover voltages needed for insulation design purposes hardly achievable due to statistical dependencies of the test results.

Författare

Sarath Kumara

Chalmers, Material- och tillverkningsteknik, Högspänningsteknik

Yuesheng Zheng

Chalmers, Material- och tillverkningsteknik, Högspänningsteknik

Yuriy Serdyuk

Chalmers, Material- och tillverkningsteknik, Högspänningsteknik

Stanislaw Gubanski

Chalmers, Material- och tillverkningsteknik, Högspänningsteknik

Raimund Summer

Manjunath Ramesh

Reiner Haller

Peter Martinek

Proceedings of 18th International Symposium on High Voltage Engineering, Aug. 25-30, 2013, Seoul, Korea

509-514

Styrkeområden

Energi

Ämneskategorier

Annan elektroteknik och elektronik