Výzkum v oblasti částečných výbojů leteckých systémů

Abstract

In aircraft systems today, voltage levels are used that prevent the possibility of partial discharges. This level is derived from Paschen's law. Due to the limited voltage level and the increasing electrification of aircraft equipment, power demands are increasing and with it the cross sections of conductors and dimensioning of components to meet these demands. This results in an increase in aircraft weight and a reduction in operational efficiency. The use of higher voltages would both reduce the cross-sections of the conductors and reduce the weight of the current carrying components within the machines in use, resulting in a reduction in the weight of the electrical equipment and wiring installed and thus improving the economics of aircraft operation. However, partial discharges are a problem, the presence of which is undesirable and could endanger the safety of flight operations. This is because if present for long enough, it degrades insulation systems and can cause them to fail. To this end, it is necessary to investigate the effect of pressure on the generation and development of partial discharges and to find ways to eliminate this hazard, or to detect it safely, so as to avoid the failure of the insulation system inside the aircraft and subsequent disaster. In this work, the effect of pressure and cavity parameters on internal partial discharges in dielectric systems is investigated.