The objectives of this investigation were twofold:
- Complete the investigation of the impulse performance of insulated jacket, semi-conductive jacket, and bare concentric neutral cable. Included were tests of induced currents from ground strokes and, for the two jacketed cable types, neutral-ground voltages and the voltage required to puncture the jackets.
- Evaluation of various grounding electrodes and comparison of impulse impedance to measured and calculated ground resistances.
Develop software allowing members to evaluate various overhead distribution line designs with respect to performance for direct and induced lightning strokes. (Project terminated in early stages due to overlap with an ongoing EPRI project with similar objectives.)Read More →
Assess the effectiveness of passive techniques to mitigate harmonics from distributed sources on residential feeders. Passive mitigations evaluated included:
- Optimal sizing and placement of distribution capacitors.
- Tuned filters.
- Grounded-wye delta transformers (to shunt zero-sequence harmonics).
Establish critical fault energy withstand limits, above which padmounted transformers are expected to experience tank deformation and leaks, for:
- Single-phase padmounted transformers.
- Three-phase padmounted transformers.