In order to solve the fault location problem of the petal-shaped distribution network with inverter interfaced distributed generation (IIDG), a comprehensive fault location method based on electrical parameters is proposed, which can address fault location for three distinct fault types. For two-phase short circuit faults, a fault line identification method utilizing the phase difference of negative sequence current is proposed. For single-phase grounding faults, a distance measurement equation is derived based on zero-sequence components, with the inclusion of section line length constraints to eliminate spurious roots and accurately determine the actual fault location. For symmetrical faults, the fault location is determined by leveraging the phase and magnitude of positive sequence currents across multiple lines. The fault distance and grounding resistance of the proposed method are tested by PSCAD/EMTDC system under different fault scenarios. The results demonstrate that the proposed method achieves higher location accuracy compared to other approaches, with location errors not exceeding 1% for different fault types, thereby confirming the superior precision and fault-tolerant capabilities of the method in petal-shaped distribution networks with IIDG.
