METHOD AND DEVICE FOR MAINTAINING ELECTRIC POWER SUPPLY IN A MULTIPHASE ELECTRIC ENERGY DISTRIBUTION NETWORK

摘要

This method for maintaining electric power supply in an electric energy distribution network, in the event of a fault on one phase, consists in the following steps: detecting the fault and connecting it to earth to cancel the fault current; computing an asymmetric current (IKDD) comprising a first component representative of the balance error in the absence of fault and a second component representative of the fault current, computing the difference between the said asymmetric current (IKDD) and a threshold value based on the value of the asymmetric current in the absence of fault so as to verify the cancellation of the fault current and maintaining the electric energy supply if the computed value of the asymmetric current (IKDD) is less than the said threshold value.