Replacing coal by electricity projects is one of the national public welfare projects. In the field of energy conversion, the larger the number of electric heating users is, the more favorable it is to control air pollution, and the more significant benefits of the society, ecological system and environment are. This paper put forward a technology for solving restriction on rapid development of clean electricity heating due to electrical equipment capacity. It is able to enable a large number of users to access the power distribution network without capacity increase or with little capacity increase, which is beneficial to promoting electric heating extensively and accelerating the process of “replacing bulk coal by clean electric energy” project in China.

Information transmission is an important part of the Internet of things. At present, the different devices produced by IOT (Internet of things) manufacturers give rise to the various connection modes, such as infrared, Wi-Fi, network cable, Bluetooth, ZigBee, VB IOT, Lora and LTE, making the market in chaos. In view of the above situation, this paper proposed a new way of IOT communication by using PLC power line carrier for encrypted transmission. It covered the IOT network to all power supply terminals by using wires in the unit of the area. In this way, the IOT devices can be powered, solving the problem of the last kilometer of network signal transmission.