Abstract
In light of the difficulty of the inspection and maintenance of a transmission line condition monitoring system in remote mountainous areas, this paper proposes a long-term online monitoring scheme based on a low power wide area network (LPWAN). Considering different failure rates, three monitoring periods of transmission lines in mountainous areas are proposed. An online monitoring framework of transmission lines in mountainous areas was designed based on long range radio (LoRa) and a cellular mobile network, and a dynamic group network model of LoRa was established. The multi-objective particle swarm optimization algorithm can be used to optimize the energy and delay of the system, and then the suitable working mode for the three monitoring periods can be obtained. The simulation results showed that the minimum packet loss rate of the system could be less than 1%, the energy consumption of the system was 80% lower than the existing monitoring system, and the service life of the system can reach 15.13 years under the normal failure rate. Compared with the existing schemes, the proposed work shows the advantages of high reliability transmission, low cost and long-term monitoring, which is especially for transmission line monitoring in mountainous areas.
Highlights
The reliability of power grid transmission largely depends on the reliability of the transmission line working state [1]
Taking the failure rate of transmission lines in mountainous areas provided in Table 6 as an example, it can be seen that the monitoring system works 82% of the time in a year of daily monitoring mode, which can reduce the energy consumption by 80% compared with the online monitoring system with a single working mode
This paper proposed a monitoring system of a transmission line in a mountainous area based on low power wide area network (LPWAN)
Summary
The reliability of power grid transmission largely depends on the reliability of the transmission line working state [1]. In [2,3,4,5], robots and unmanned aerial vehicles (UAVs) were proposed for automatic line inspection, showing the advantages of low cost and high efficiency compared with manual inspection These methods are still not real time and are difficult to operate in mountainous area. The communication distance of WSN is relatively short and its work life is limited, which is not suitable for long-term monitoring of transmission lines in mountainous areas. Low power wide area network (LPWAN) is a new emerging internet of things (IoT) communication technology, which complements between mobile cellular technology and WSN. According to the requirements of energy consumption and time delay, an online monitoring framework of transmission lines in mountainous areas was designed based on the hybrid network integrating.
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