Abstract:The traditional reliability evaluation method for the operation of low-voltage collection systems lacks a specific reliability evaluation index framework and cannot accurately determine the operating status of the system, causing problems in the evaluation accuracy, evaluation efficiency, evaluation reliability, and evaluation integrity. A method for evaluating the reliability of low-voltage collection systems based on LoRa technology is proposed. In the LoRa framework agreement, the evaluation index of system operation reliability is set, and the state transition rate, stationary state probability, and instantaneous state of the components of the low-voltage collection system are determined to determine whether the system operation state is reliable. On this basis, the load carrying capacity of each node in each operating state of the system and the risk of voltage collapse are calculated separately. This completes the operation reliability evaluation of the low-voltage collection system. It is verified by experiments that the average accuracy of the proposed method is 25% higher than that of the traditional method, and the evaluation efficiency, reliability and completeness of the proposed method are higher than those of the traditional method.