Route selection method for single-phase ground fault of two-phase TA power distribution network
A single-phase ground fault and fault line selection technology, which is applied to electrical components, emergency protection circuit devices, etc., can solve problems affecting applications, high hardware requirements, large investment, etc., and achieve high success rate, high accuracy and reliability Effect
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[0026] The invention divides the single-phase ground fault line selection problem of the two-phase TA distribution network into two parts to solve the problem. When the phase A or phase C is grounded, because the transient current data of the fault phase can be obtained from one of the installed A and C two-phase TAs, consider using the A and C two-phase currents to construct the B-phase current first. Furthermore, a more accurate zero sequence current that can be used for line selection is synthesized, and line selection is realized according to the transient characteristics of the zero sequence current. When the phase B is grounded, because the phase is not equipped with TA, the transient current of the faulted phase B cannot be obtained, and the zero sequence current that reflects the transient characteristics of the fault cannot be constructed. Therefore, a separate line selection method needs to be studied. Considering that after the B phase is grounded, the difference betwee...
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