Shunt capacitors have always been the equipment with high failure rate in substation

while there are dozens of capacitors in a group of capacitors and a large number of series and parallel elements inside each capacitor

which makes it very difficult for the capacitor bank to quickly and accurately locate the fault. In this paper

a fault location algorithm based on neutral line unbalanced current is proposed for the application of double wye connection in shunt parallel capacitor banks. At the same time

considering the difference between the fused and fuseless capacitor

the derivation is made respectively. The simulation model established by PSCAD and Matlab is used to verify the feasibility of the algorithm proposed by the capacitorunitinthecaseofsinglefault

multiple fault and continuous fault of the unit.