To ensure normal operation of onboard electrical equipment, a metal grounding and current return network should be added to the composite aircraft fuselage to meet the grounding requirements of the onboard electrical system. For calculation of the pressure drop in the composite aircraft grounding and current return network, the conductor-based volumetric partial element equivalent circuit method is used to model the grounding and current return network installed on the composite aircraft. We analyze the voltage drop of partial distribution unit loads which belong to 28 VDC, 115 VAC bus along the path in the grounding grid under the cruising condition, and consider the influence of large fault current injection and contact impedance between components on the voltage drop of the grounding and current return network. The voltage drop in the network is analyzed by establishing a simplified model. The proposed calculation method and simulation calculation results of the voltage drop in the network can provide references for the design and installation of composite aircraft grounding and current return network, fault management and electrical protection system design.
YANG Zhangang
,
SUI Zheng
,
ZHANG Qihao
,
LIU Jianying
. Voltage drop in composite aircraft grounding and current return network[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022
, 43(1)
: 324859
-324859
.
DOI: 10.7527/S1000-6893.2021.24859
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