Relay Protection Method for Medium and Low Voltage Distribution Network Considering Distributed New Energy Access

This article proposes a new method for relay protection in medium and low voltage distribution networks, targeting distributed new energy access while balancing reliability, adaptability, and economy. By constructing an objective function, analyzing the impact of new energy grounding, setting compensation coefficients, calculating protection delay and distance, establishing protection constraint intervals, and generating protection schemes. The experiment shows that this method has accurate setting values, high efficiency, and excellent protection performance.