A New Short-Circuit Protection Scheme for Boost Converter

Protections of converters are a challenging task to avoid the damage of the converter and minimize operational efficiency. In this paper, a new dc short-circuit (SC) protection approach with boost converter is implemented to protect the dc bus, load, and converter’s component from the SC fault current. If a SC fault occurs in the dc bus or load side, the proposed protection scheme isolates the power supply from the converter and reconfigures the converter for damping the SC current. The SC current circulates through the damping resistance thus, damps gradually to zero. The significant key point of the proposed scheme infers that the detection of a short-circuit fault is done by the voltage control loop. Other key points are low component count and fast isolation. The fast isolation is achieved even in case of lower SC resistance. The presented fault protection scheme integrated with the converter is useful in its application at load or source side in the dc microgrids. The detailed analysis, working principle, and simulation results are presented in this paper. The proposed protection scheme is verified using the SPICE model of the circuit components on the “LTspice” simulator using Modified Trapezoidal Integration solver.