Inside the GIS Partial Discharge Simulation System: A Testing Platform That Actually Matches Real Faults
Most Partial Discharge test benches stop at detecting whether PD exists. This one goes further — it shows you exactly which kind of discharge you're dealing with, under conditions close enough to real GIS operation that the data actually means something.
The transformer partial discharge free test system was designed around actual physical GIS architecture. That sounds obvious, but a lot of simulation rigs cut corners. Here, the internal layout, the SF6 environment, and the electrode geometry follow real-world configurations, so when you simulate a tip discharge or a free metallic particle moving inside the enclosure, the resulting signal isn't an approximation — it's what field engineers see on 110 kV to 500 kV equipment in service.
What fault types it covers
The discharge simulation module handles six conditions you'll encounter in live GIS: metal protrusion (tip) discharge from 5 to 800 pC, free particle discharge at 0.1 to 10 pC, floating suspension discharge up to 20,000 pC, air gap breakdown between 10 and 1,000 pC, and surface creeping discharge in the same 10 to 1,000 pC range. You can run each one individually or combine them — useful when you're validating a detection algorithm against overlapping fault signatures rather than clean single-source signals.
Detection methods, all in one rig
This is where the platform earns its place in instrument assessment work. Pulse current detection (IEC 60270-compliant, 50 pF coupling capacitor built in), UHF with an internal antenna sensor, ultrasonic, high-frequency current, and SF6 gas decomposition analysis can all run from the same setup. A built-in infrared video probe lets you observe discharge behavior inside the enclosure while measurements are in progress — something you don't get with external test rigs.
The discharge level coming out of the step-up transformer stays at ≤ 1 pC, so the background noise floor doesn't mask the fault signals you're trying to characterize.
For whom
Research labs benchmarking new UHF sensors, manufacturers doing GIS factory acceptance testing, and power utilities validating live-detection instruments against known fault types will find this useful. The discharge onset and extinction voltages are adjustable, each module is reusable without recalibration drift, and fault switching is handled externally — no need to open the enclosure mid-test.
Basin insulators come in fully-shielded, bare, and casting-port variants for comparative insulation defect studies.
If your work involves PRPD pattern analysis, phase-resolved discharge characterization, or multi-method comparison testing on GIS, this is the simulation platform worth looking at first.
FAQ
What is a GIS partial discharge simulation system used for?
It reproduces internal insulation defects — tip discharge, free metal particles, air gap, suspension, and surface creeping — inside a physical GIS structure, so researchers and engineers can validate PD detection instruments and study fault signal characteristics under controlled conditions.
What detection methods does it support?
Pulse current (IEC 60270), UHF, ultrasonic, high-frequency current, and Sf6 Gas Analysis can all be used simultaneously, along with a built-in infrared video probe.
What is the background PD level of the Test Transformer?
≤ 1 pC, which is low enough to avoid masking the fault signals being simulated.
What voltage levels is it designed for?
The transformer partial discharge free test system covers 110 kV to 500 kV, matching the range of HV transmission and substation GIS in service.
Can multiple discharge types be combined in one test? Yes. The system allows simultaneous activation of different discharge modules — tip, particle, suspension, air gap, and creeping — for multi-fault simulation scenarios.