To address the issue of automatic reclosing failure caused by continuous current injection to the fault point during low voltage ride-through (LVRT) operation of inverter-interfaced distributed generation (IIDG), an improved reclosing scheme for actively isolating the IIDG and the fault point is proposed. The impact of IIDG’s LVRT operation strategy on automatic reclosing is analyzed. Circuit breakers are equipped with appropriate harmonic current protection, while the necessary condition for reclosing failure due to LVRT operation is used as the triggering condition for IIDG to inject harmonic current. On this basis, IIDG injects harmonic current when the starting criterion is met, and the harmonic current protection opens the circuit breaker between the IIDG and the fault point, thereby stopping the IIDG from injecting current into the fault point. As a result, the fault point self-extinguishes the arc and automatic reclosing succeeds. This method does not require the installation of a voltage absence detection device or extending the reclosing time, nor does it rely on a communication network. It has good adaptability in scenarios with a high proportion of new energy. Simulation results verify the effectiveness of the proposed method.