1.With implementahon of more and more electrical toads inside Aircrafts, a need for a higher voltage level becomes inevitable in order to limit the weight increase of the electrical distribution system. One way is to go to HVDC (High Voltage DC nelwork), which allows additional functionalities for the network. 2.Big issues with this high voltage DC wilt be the way to protect people from electrisation and to avoid or limit impact of electrical arc phenomenon on the environment.3.Indeed, whereas previous voltage levels allowed to guarantee people safety with few cautions, we are now facing a voltage that requires much more care. Moreover, whereas alternative voltages have, in case of default, a natural arc extinction when crossing 0V (sinus waveform), the HVDC will be more energetic and will maintain the arc until the source (or Circuit breaker) shut down the power.
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