Abstract: Non-intrusive load monitoring(NILM) is an advanced measuring technology which does not require intrusive construction into users and complicated communication channel. In this paper, the NILM technology is innovatively applied into short-circuit-fault detection and location. Firstly, based on the results of experimental and theoretical analysis, the criterion and the relevant setting process for short-circuit fault with the breaker protection is proposed. Secondly, the fault location algorithms under NILM architecture are presented, which contains three steps: primary locating method for distribution level, primary locating method for important branch based on power drop model, and accurate location method by reusing sub-metering data. Totally four single-phase short-circuit accidents are detected and located during the experiments, which effectively improves the safety level of power users and reduces the construction cost of monitoring system.

Key words: non-intrusive, short-circuit fault, detecting, fault locating, low voltage power network