High voltage direct current (HVDC) characterization platform, up to +/-400kV DC
Breakdown voltage, aging behavior, leakage current measurment (conductivity) for gas, solids and bushing (range from pA to mA)
Partial discharge measurement: conventional method and non-conventional methods
Possibility to investigate the polarity reversal performance of insulation systems (+/-400kV)
The test platform can be used to characterize the insulator (gas, solid and interface) under DC voltage up to 400kV DC. The partial discharge and the long term performance of insulators or equipment can also be investigate.
Laboratory & Equipment description
Technix +200kV DC, 3mA
Technix -200kV DC, 3mA
Leakage current measurement: Keithley electrometer 6514
Partial discharge measurement: OMICRON system & alternative methods
Glassman +400kV DC
Glassman -400kV DC
Temperature monitoring: thermocouples & PT100, PT1000
The platform is designed to perform HVDC tests under safe conditions. Thanks to the low noise of the HVDC source, partial discharge (PD) in a magnitude of few picocoulombs (pC) can be detected. The high voltage source is controlled directly via a PC and all the measurement equipment is controlled by a PLC.
A dedicated user interface is available.
Capability of measuring very low leakage current for +/-200kV DC and +/-400kV DC insulators: gas, solid and interface (order of pA)
Low noise level partial discharge measurement under DC voltage: smaller than 5pC
Continuous temperature monitoring during tests
Possibility to revers the polarity in order to establish the performance of insulators and/or equipment