The accurate single terminal fault location can be realized by using data of two time sections to set up equations to describe the constant transmission line topology between two-terminal circuit breakers

the time after fault and that after single-phase circuit breaker tripping. But this method assumes that the impedance of opposite terminal and fault resistance in fault branch are constant between two time sections

which is untenable at the system side in transmission lines with wind farm connection. For this problem

the idea of operating fault location at the wind farm side is proposed to overcome the problem of equivalent system impedance variation between two time-sections. And then a new fault location equations direct calculation algorithm is proposed to resolve the problem of low fault location accuracy in the case of high impedance faults

which is usually produced by the previously adopted iterative searching algorithm. Fault distance and transitional resistance can thus be directly obtained using the new algorithm while subsequent research on adaptive reclosing is provided with a new line of thought. This work is supported by National Natural Science Foundation of China(No. 51477084)and State Key Laboratory of Power System(No. SKLD16Z07).